Relevant bibliographies by topics / Supramolecular chemistry; Molecular recognition

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Supramolecular chemistry; Molecular recognition'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Supramolecular chemistry; Molecular recognition"

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Safarnejad Shad, Mastaneh, Pulikkal Veettil Santhini, and Wim Dehaen. "1,2,3-Triazolium macrocycles in supramolecular chemistry." Beilstein Journal of Organic Chemistry 15 (September 12, 2019): 2142–55. http://dx.doi.org/10.3762/bjoc.15.211.

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In this short review, we describe different pathways for synthesizing 1,2,3-triazolium macrocycles and focus on their application in different areas of supramolecular chemistry. The synthesis is mostly relying on the well-known “click reaction” (CuAAC) leading to 1,4-disubstituted 1,2,3-triazoles that then can be quaternized. Applications of triazolium macrocycles thus prepared include receptors for molecular recognition of anionic species, pH sensors, mechanically interlocked molecules, molecular machines, and molecular reactors.
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Liu, Yu, and Shizhao Kang. "Molecular recognition on supramolecular systems (XXXV)." Science in China Series B: Chemistry 44, no. 3 (June 2001): 260–67. http://dx.doi.org/10.1007/bf02879616.

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Lehn, Jean-Marie. "Towards Complex Matter: Supramolecular Chemistry and Self-organization." European Review 17, no. 2 (May 2009): 263–80. http://dx.doi.org/10.1017/s1062798709000805.

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Chemistry has developed from molecular chemistry, mastering the combination and recombination of atoms into increasingly complex molecules, to supramolecular chemistry, harnessing intermolecular forces for the generation of informed supramolecular systems and processes through the implementation of molecular information carried by electromagnetic interactions. Supramolecular chemistry is actively exploring systems undergoing self-organization, i.e. systems capable of spontaneously generating well-defined functional supramolecular architectures by self-assembly from their components, on the basis of the molecular information stored in the covalent framework of the components and read out at the supramolecular level through specific molecular recognition interactional algorithms, thus behaving as programmed chemical systems. Supramolecular entities as well as molecules containing reversible bonds are able to undergo a continuous change in constitution by reorganization and exchange of building blocks. This capability defines a Constitutional Dynamic Chemistry (CDC) on both the molecular and supramolecular levels. CDC introduces a paradigm shift with respect to constitutionally static chemistry. It takes advantage of dynamic constitutional diversity to allow variation and selection and thus adaptation. The merging of the features of supramolecular systems – information and programmability; dynamics and reversibility; constitution and structural diversity – points towards the emergence of adaptive chemistry. A further development will concern the inclusion of the arrow of time, i.e. of non-equilibrium, irreversible processes and the exploration of the frontiers of chemical evolution towards the establishment of evolutive chemistry, where the features acquired by adaptation are conserved and transmitted. In combination with the corresponding fields of physics and biology, chemistry thus plays a major role in the progressive elaboration of a science of informed, organized, evolutive matter, a science of complex matter.
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Haino, Takeharu. "Supramolecular Polymerization Engineered with Molecular Recognition." Chemical Record 15, no. 5 (July 14, 2015): 837–53. http://dx.doi.org/10.1002/tcr.201500012.

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Schalley, Christoph A. "Molecular recognition and supramolecular chemistry in the gas phase." Mass Spectrometry Reviews 20, no. 5 (2001): 253–309. http://dx.doi.org/10.1002/mas.10009.

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Zimmerman, Steven C. "A journey in bioinspired supramolecular chemistry: from molecular tweezers to small molecules that target myotonic dystrophy." Beilstein Journal of Organic Chemistry 12 (January 25, 2016): 125–38. http://dx.doi.org/10.3762/bjoc.12.14.

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This review summarizes part of the author’s research in the area of supramolecular chemistry, beginning with his early life influences and early career efforts in molecular recognition, especially molecular tweezers. Although designed to complex DNA, these hosts proved more applicable to the field of host–guest chemistry. This early experience and interest in intercalation ultimately led to the current efforts to develop small molecule therapeutic agents for myotonic dystrophy using a rational design approach that heavily relies on principles of supramolecular chemistry. How this work was influenced by that of others in the field and the evolution of each area of research is highlighted with selected examples.
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Spaniol, Jacqueline M., and Kraig A. Wheeler. "Accessing Centnerszwer's quasiracemate – molecular shape controlled molecular recognition." RSC Advances 6, no. 69 (2016): 64921–29. http://dx.doi.org/10.1039/c6ra08131b.

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Yu, Liu, and You Changcheng. "Molecular recognition studies on supramolecular systems (XXIV)." Science in China Series B: Chemistry 43, no. 1 (February 2000): 27–33. http://dx.doi.org/10.1007/bf03028846.

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Zeng, Fanwen, and Steven C. Zimmerman. "Dendrimers in Supramolecular Chemistry: From Molecular Recognition to Self-Assembly." Chemical Reviews 97, no. 5 (August 1997): 1681–712. http://dx.doi.org/10.1021/cr9603892.

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Newkome, George R., Barry D. Woosley, Enfei He, Charles N. Moorefield, Ralf Güther, Gregory R. Baker, Gregory H. Escamilla, John Merrill, and Heinrich Luftmann. "Supramolecular chemistry of flexible, dendritic-based structures employing molecular recognition." Chem. Commun., no. 24 (1996): 2737–38. http://dx.doi.org/10.1039/cc9960002737.

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Dissertations / Theses on the topic "Supramolecular chemistry; Molecular recognition"

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Kerdelhue, Jean-Luc. "The higher paracyclophanes : potential receptors for the molecular recognition of molecular halogens and benzenes." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307819.

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Rajbanshi, Arbin. "Supramolecular interactions from small-molecule selectivity to molecular capsules." Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3879.

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Agostini, Alessandro. "Supramolecular and heterosupramolecar chemistry in controlled release and molecular recognition processes." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/29397.

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La presente tesis doctoral titulada ¿Supramolecular and heterosupramolecular chemistry in controlled release and molecular recognition processes¿ está centrada en los dos aspectos principales de la química supramolecular que han experimentado un gran auge en los últimos años: el reconocimiento molecular y los procesos de liberación controlada. En particular la primera parte de la tesis se focaliza en el diseño y síntesis de moléculas orgánicas que pueden ser empleados cómo sensores para especies aniónicas y neutras. El paradigma seleccionado para los procesos de reconocimiento molecular fue la aproximación del dosimetro químico. Esta aproximación presenta ventajas con respecto a los otros dos métodos de determinación de aniones (desplazamiento y unidad coordinanteunidad indicadora), cómo, por ejemplo, la posibilidad de determinar los analitos en disolución acuosa. Así se sintetizaron dos sensores selectivos, uno para el anión fluoruro (F-) y el otro para glutatión (GSH). El sensor selectivo para la determinación de F- está basado en un colorante azoico funcionalizado, en su ¿OH fenólico, cómo silileter. Esta molécula presenta una banda de absroción muy intensa centrada a 350 nm que, después de la adición de F- , sufre un efecto hipocrómico significativo y un desplazamiento batocromico ligero (de ca. 10 nm), mientras aparece una nueva banda a 470 nm, determinando un cambio de incoloro a amarillorojo. Para obtener un sensor selectivo para GSH se sintetizó una sonda químico basado en una sal de 2,6-difenilpirilio. Sucesivamente se preparó una disolución de este compuesto en agua/CTAB, que se caracterizaba por un intenso color azul. En este caso, la adición de GSH produce una disminución significativa de la banda del visible, acompañada por la consecuente decoloración. Además la adicón de GSH induce la aparición de Resumen vi una intensa banda de emisión centrada a 485 nm (después de la irradiación a 350 nm). La segunda parte de esta tesis doctoral se basa en el diseño y síntesis de nuevos sistemas híbridos orgánicos-inorgánicos para procesos de liberación controlada en ambiente celular. Estos materiales híbridos se componen en general, de dos unidades: una matriz inorgánica mesoporosa de base silícea, capaz de almacenar moléculas orgánicas (colorantes, farmacos...) y un compuesto orgánico anclado covalentemente a la superficie externa del soporte inorgánico mesoporoso, que actúa cómo puerta molecular. La aplicación de un estímulo externo puede modificar la conformación de la puerta molecular permitiendo o bien impidiendo la difusión de la carga almacenada en los mesoporos hacía el exterior (disolución o citoplasma). El primer sistema sintetizado y estudiado se compone de una matriz inorgánica mesoporosa (MCM-41), cargada con el colorante Ru(bipy)3 2+ y funcionalizada en la superficie con un oligoetilen glicol mediante un grupo ester. La adición de la enzima esterasa determinaba la hidrólisis del grupo ester y la consecuente reducción del tamaño de la puerta molecular, acompañada por la liberación del colorante previamente cargado. Otro sistema de liberación preparado consiste en el uso de la misma matriz MCM-41 nanoscópica y el mismo colorante Ru(bipy)3 2+, pero se funcionalizó la superficie con una puerta molecular fotolabil. La irradiación en el maximo de absorción de la puerta molecular inducía la fotodegradación de la misma y la consecuente liberación del colorante. Un tercer ejemplo de sistema de liberación consiste en una puerta molecular caracterizada por la presencia de dos grupos funcionales hidrolizables con enzimas diferentes: grupos urea y amida. vii El material final, caracterizado por la presencia del mismo esqueleto inorgánico, y cargado con Ru(bipy)3 2+, era capaz de liberar selectivamente cantidades distintas de colorante, dependiendo del enzima empleado. Así se podían conseguir dos tipos de perfiles de liberación: uno muy rápido y poco intenso y otro más lento pero mucho mas intenso. Finalmente se sintetizó un material híbrido siempre basado en la misma matriz de MCM- 41, cargado con rodamina-B y funcionalizado en la superficie con galactooligosacáridos. Con este material se podía conseguir una liberación controlada del colorante selectivamente en células senescentes, debido a que estas sobreexpresan el enzima ß-galactosidasa que es capaz de hidrolizar los galactooligosacáridos.
Agostini, A. (2013). Supramolecular and heterosupramolecar chemistry in controlled release and molecular recognition processes [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/29397
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South, Clinton Ray. "Polymer side-chains as arms for molecular recognition." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22667.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2008.
Committee Chair: Weck, Marcus; Committee Member: Beckham, Haskell; Committee Member: Bunz, Uwe; Committee Member: Jones, Christopher; Committee Member: Marder, Seth.
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Welideniya, Dhanushi Thathsara. "Supramolecular chemistry of small molecular fundamentals to drug–receptor applications." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/19106.

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Doctor of Philosophy
Department of Chemistry
Christer B. Aakeroy
A family of bis-pyridine based pharmaceutical active ingredients were synthesized and co-crystallized with four iodoperfluoroalkanes. Thirteen new crystal structures that are driven by I‧‧‧N(py) halogen bonds, are presented and compared with that of their hydrogen-bonded analogues. Halogen bonded co-crystals exhibit two different structural arrangements, as opposed to layered architectures observed in hydrogen bonded co-crystals. In order to explore the effect of aromatic stacking interactions on hydrogen and halogen bond driven co-crystallization process, we utilized a series of aromatic hydrogen and halogen bond donors in combination with bis-pyridine based pharmaceutical active ingredients. Aromatic stacking between the donor and the acceptor were limited, due to the lack of complementarity between the donor and the acceptor in terms of size, shape and geometry. In that case, homomeric interactions between the single components were translated into the structure of the binary co-crystals. According to our charge calculations, similarly activated hydrogen and iodine atoms possess similar electrostatics. Therefore, we wanted to investigate the interchangeability of hydrogen bonds and halogen bonds by utilizing 2-aminopyrimidine as the backbone for C(sp)-H and C(sp)-I functionalities which makes self-complementary ribbons via NH‧‧‧N synthons. Our results show that the ethynyl proton is capable of acting as a synthon mimic of ethynyl iodine by interchangeable C(sp)-H‧‧‧N hydrogen bonds and C(sp)-I‧‧‧N halogen bonds. We exploited the halogen bonding donor capability of iodo, bromo and chloro ethynyl functionalities towards a series of halide ions. Based on the grinding experiments these donors showed 90%, 70% and 50% success rates towards halides. Among the halides, chlorides exhibited the highest red shift compared to bromides and iodides. We synthesized a series of cavitands functionalized with hydrogen bond donor and acceptor groups and studied their binding preferences towards a series of active ingredients. We have shown that suitably functionalized cavitands can act as carriers of active ingredients and especially, selective binding of aspirin is demonstrated using a two-point binding mode.
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D'Souza, Lawrence Joseph. "Bile Acid Based Molecular Tweezers And Crown Ethers." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/114.

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Chapter 1. Introduction to Molecular Tweezers Whitlock and Zimmerman developed a class of molecular hosts, popularly known as molecular tweezers, which sandwich aromatic guests by ii=ii interaction. Chapter 1 summarizes molecular tweezers of various kinds which have recently been synthesized. Chapter 2. Design and synthesis of "Bile Acid-Based Molecular Tweezers" Bile acids have a rigid backbone, and the array of hydroxyl groups separated by 5-7 A provides opportunities for the attachment of binding surfaces such as two extended chromophoric units.
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Gardlik, Matthew Michael. "Design, synthesis, and encapsulation processes of molecular baskets." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1243536105.

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Tiwari, Laxmikant. "Design and synthesis of novel anion receptors." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312677.

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Shade, Matthew. "Redox-active calixarenes as receptors for anions and neutral molecules." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242875.

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De, la Torre Paredes Cristina. "Nanotechnology and supramolecular chemistry in controlled release and molecular recognition proceses for biomedical applications"." Doctoral thesis, Universitat Politècnica de València, 2018. http://hdl.handle.net/10251/94043.

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La presente tesis doctoral, titulada "Nanotecnología y química supramolecular en procesos de liberación controlada y reconocimiento molecular para aplicaciones biomédicas", se centra en dos temas importantes: el reconocimiento molecular y los procesos de liberación controlada. Esta tesis doctoral está estructurada en cuatro capítulos. El primer capítulo introduce el concepto de materiales híbridos orgánicos-inorgánicos funcionalizados con puertas moleculares y sus aplicaciones biomédicas como nanomateriales para dirigir y controlar la liberación controlada de fármacos. Además se introduce una breve descripción sobre sensors colorimétricos basados en la base de la quimica supramolecular, particularmente en los procesos de reconocimiento molecular. En particular, el capítulo 2 describe la preparacion de cinco nanodispositivos que responden a enzimas. Estos materiales híbridos se componen de dos unidades principales: un soporte mesoporoso basado en sílice inorgánica, capaz de encapsular moléculas orgánicas y un compuesto orgánico anclado en la superficie externa del soporte mesoporoso inorgánico que actúa como puerta molecular. Todos los sistemas propuestos utilizan puertas moleculares peptídicas que responden a temperatura o enzimas como estímulo. La segunda parte de esta tesis doctoral se centra en el diseño y desarrollo de un nuevo compuesto químico capaz de detectar monóxido de carbono in vivo. En resumen, para todos los resultados antes mencionados podemos decir que esta tesis doctoral constituye una contribución científica original al desarrollo de la química supramolecular. Sus resultados derivados de los estudios presentados dejan rutas abiertas para continuar el estudio y el desarrollo de nuevos materiales híbridos y sensors químicos más eficientes para aplicaciones biomédicas y terapeuticas.
This PhD thesis entitled "Nanotechnology and supramolecular chemistry in controlled release and molecular recognition processes for biomedical applications", is focused on two important subjects: molecular recognition and controlled delivery processes. This PhD thesis is structured in four chapters. The first chapter introduces the concept of organic-inorganic hybrid materials containing switchable "gate-like" ensembles and their biomedical applications as nanomaterials for targeting and control drug delivery. Furthermore, is introduced a short review about chromo-fluorogenic chemosensors based on basic principles of supramolecular chemistry, particulary in molecular recognition processes. In particular, in chapter 2 is focus on the development of enzymatic-driven nanodevices. These hybrid materials are composed of two main units: an inorganic silica based mesoporous scaffold, able to store organic molecules and an organic compound anchored on the external surface of the inorganic mesoporous support than acts as molecular gate. All the systems proposed use peptidic gates that respond to temperature or enzimatic stimulis. The second part of this PhD thesis is focused on the design and development of a new chemical compound capable of detecting carbon monoxide in vivo. In summary, for all the results above mentioned we can say that this PhD thesis constitutes an original scientific contribution to the development of supramolecular chemistry. Its results derived from the studies presented leaves open routes to continue the study and development of new hybrid materials and more efficient chemical sensors with biomedical and therapeutic applications.
La present tesi doctoral, titulada "Nanotecnologia i química supramolecular en processos d'alliberament controlat i reconeixement molecular per a aplicacions biomèdiques", es centra en dos temes importants de la química: el reconeixement molecular i els processos d'alliberament controlat. Aquesta tesi doctoral està estructurada en quatre capítols. El primer capítol introdueix el concepte de materials híbrids orgànics-inorgànics funcionalitzats amb portes moleculars i les seves aplicacions biomèdiques com nanomaterials per dirigir i controlar l'alliberament controlat de fàrmacs. A més s'introdueix una breu descripció sobre sensors colorimètrics fonamentats en la base de la química supramolecular, particularment en els processos de reconeixement molecular. En particular, el capítol 2 descriu la preparació de cinc nanodispositius que responen a enzims. Aquests materials híbrids es componen de dues unitats principals: un suport mesoporos basat en sílice inorgànica, capaç d'encapsular molècules orgàniques i un compost orgànic ancorat a la superfície externa del suport mesoporós inorgànic que actua com a porta molecular. La segona part d'aquesta tesi doctoral es centra en el disseny i desenvolupaent d'un nou compost químic capaç de detectar monòxid de carboni in vivo. En resum, per a tots els resultats abans mencionats podem dir que esta tesi doctoral constituïx una contribució científica original al desenvolupament de la química supramolecular. Els seus resultats derivats dels estudis presentats deixen rutes obertes per a continuar l'estudi i el desenvolupament de nous materials hibrids i sensors químics més eficients per a aplicacions biomèdiques i terapeutiques.
De La Torre Paredes, C. (2017). Nanotechnology and supramolecular chemistry in controlled release and molecular recognition proceses for biomedical applications" [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/94043
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Books on the topic "Supramolecular chemistry; Molecular recognition"

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Weber, E., ed. Supramolecular Chemistry II — Host Design and Molecular Recognition. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/3-540-58800-0.

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Canceill, J., J. C. Chambron, A. Collet, Ch Dietrich-Buchecker, H. D. Durst, J. P. Dutasta, F. H. Kohnke, et al. Supramolecular Chemistry I — Directed Synthesis and Molecular Recognition. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/bfb0111279.

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L, Atwood J., ed. Supramolecular chemistry. 2nd ed. Hoboken: Wiley, 2008.

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Gale, Philip A., W. Dehaen, and E. Alcade. Anion recognition in supramolecular chemistry. Heidelberg: Springer, 2010.

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Gale, Philip A., and Wim Dehaen, eds. Anion Recognition in Supramolecular Chemistry. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15444-7.

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Simon, J. Design of molecular materials: Supramolecular engineering. Chichester, England: Wiley, 2000.

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Marguerettaz, Xavier. Supramolecular chemistry at the semiconductor-liquid electrolyte interface. Dublin: University College Dublin, 1997.

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Functional supramolecular architectures: For organic electronics and nanotechnology. Weinheim, Germany: Wiley-VCH, 2011.

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D, Försterling H., ed. Principles of physical chemistry: Understanding molecules, molecular assemblies, supramolecular machines. Chichester: Wiley, 2000.

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service), SpringerLink (Online, ed. Molecular networks. Berlin: Springer, 2009.

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Book chapters on the topic "Supramolecular chemistry; Molecular recognition"

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Arduini, A., A. Casnati, M. Fabbi, P. Minari, A. Pochini, A. R. Sicuri, and R. Ungaro. "New Shapes For Selective Molecular Recognition From Calixarenes." In Supramolecular Chemistry, 31–50. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2492-8_3.

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Dearden, David V. "Host-Guest Molecular Recognition Without Solvents." In Physical Supramolecular Chemistry, 229–47. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0317-3_15.

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Knipe, Peter C., Sam Thompson, and Andrew D. Hamilton. "Molecular Recognition in Biomimetic Receptors." In Macrocyclic and Supramolecular Chemistry, 146–64. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119053859.ch7.

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Buergi, H. B. "On Molecular Recognition in Fullerene Chemistry." In Crystallography of Supramolecular Compounds, 31–44. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1692-0_3.

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Bampos, Nick, Zöe Clyde-Watson, Joanne C. Hawley, Chi Ching Mak, Anton Vidal-Ferran, Simon J. Webb, and Jeremy K. M. Sanders. "NMR Studies of Molecular Recognition by Metalloporphyrins." In NMR in Supramolecular Chemistry, 37–44. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4615-9_3.

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Jorgensen, William L., Wolfgang Damm, Antonio Frontera, and Michelle L. Lamb. "Molecular Recognition of Carbohydrates: Interaction of Diols with Acetate Ion." In Physical Supramolecular Chemistry, 115–26. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0317-3_8.

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de Vink, Pim J., and Luc Brunsveld. "Chapter 17. Molecular Recognition of Proteins by Cucurbiturils." In Monographs in Supramolecular Chemistry, 464–82. Cambridge: Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788015967-00464.

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Brodbelt, J. S. "Evaluation of Hydrogen-Bonding Interactions in Molecular Recognition By Ion Trap Mass Spectrometry." In Physical Supramolecular Chemistry, 249–60. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0317-3_16.

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Becher, Jan, Zhan-Ting Li, Philippe Blanchard, Niels Svenstrup, Jesper Lau, Mogens Brøndsted Nielsen, and Klaus B. Simonsen. "Tetrathiafulvalenes in Macrocyclic and Supramolecular Chemistry: Self Assembly with Tetrathiafulvalenes." In Molecular Recognition and Inclusion, 85–95. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5288-4_9.

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Desiraju, Gautam R., and C. V. Krishnamohan Sharma. "Crystal Engineering and Molecular Recognition-Twin Facets of Supramolecular Chemistry." In Perspectives in Supramolecular Chemistry, 31–61. Chichester, UK: John Wiley & Sons, Ltd., 2007. http://dx.doi.org/10.1002/9780470511459.ch2.

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Conference papers on the topic "Supramolecular chemistry; Molecular recognition"

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Long, Timothy E., Casey L. Elkins, Lars Kilian, Taigyoo Park, Scott R. Trenor, Koji Yamauchi, Ralph H. Colby, Donald J. Leo, and Brian J. Love. "“Reversible Macromolecules” as Scaffolds for Adaptive Structures." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43010.

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Self-healing macromolecular structures, submicron capsules and fibers with molecular recognition, stimuliresponsive molecules, solvent-free rheological reversibility, multivalency in rational drug design, and the emergence of new fields of adaptive and evolutive chemistry will require a predictive synergy of tailored non-covalent and covalent bonding in molecular design. Supramolecular chemistry has emerged as a stimulating focal point that will enable these scientific and technological discoveries, and biorecognition and biomolecular organization often serve as the inspiration for the future design of supramolecular assemblies. Linear and branched macromolecules are conventionally prepared using unique combinations of step-growth and chain polymerization strategies wherein the repeating units are irreversibly connected using stable covalent bonds. Moreover, optimum physical properties and commercial success of macromolecules are derived from our ability to prepare exceptionally high molecular weights in a controlled fashion. Although high molecular weight linear macromolecules are desirable for the optimization of physical performance and commercial impact, high molecular weights often compromise future solvent-free manufacturing, melt processability, thermal stability, and recyclability of the final products. Our recent efforts have demonstrated the utility of living anionic polymerization techniques to place functionality at desired positions on the polymer backbone. This control allowed investigation of the relationship between topology and tailored functionality, a fundamental investigation that may lead to interesting adaptive and smart applications. Specifically, the synthesis of polyisoprene homopolymers in a variety of topologies was performed, as well as the introduction of complementary hydrogen bonding to diverse families of hydroxyl containing polymeric and monomeric precursors.
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Jorobekova, Sh. "Molecular recognition in supramolecular systems of humic substances." In Fifth International Conference of CIS IHSS on Humic Innovative Technologies «Humic substances and living systems». CLUB PRINT ltd., 2019. http://dx.doi.org/10.36291/hit.2019.jorobekova.030.

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Seela, Frank, Xiaohua Peng, Hong Li, Padmaja Chittepu, Khalil I. Shaikh, Junlin He, Yang He, and Igor Mikhailopulo. "Modified DNA: From synthesis to molecular recognition." In XIIIth Symposium on Chemistry of Nucleic Acid Components. Prague: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2005. http://dx.doi.org/10.1135/css200507001.

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Higgins, M. J., M. Polcik, T. Fukuma, J. E. Sader, and S. P. Jarvis. "Direct Mechanical Measurement of Organised Water and the Influence of Adjacent Surface Chemistry Using Atomic Force Microscopy (Keynote)." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64383.

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Directly measuring structural changes in water with a mechanical probe of lateral dimensions comparable to that of a single molecule provides an invaluable insight into how and why bio-molecules behave with high selectivity or why certain surfaces promote or inhibit bio-molecular adhesion. In the immediate vicinity of the molecule, continuum models break down and the aqueous environment will often form a discrete layered structure depending on the nature of the molecule. The absence or presence of such structure may be fundamental in influencing the promotion or inhibition of protein adsorption, biological function and membrane recognition.
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Veličković, Suzana, and Xianglei Kong. "„Superalkali” clusters, production, potential application like energy storage materials." In 8th International Conference on Renewable Electrical Power Sources. SMEITS, 2020. http://dx.doi.org/10.24094/mkoiee.020.8.1.15.

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One of the major developments of the past century was the recognition of clusters as building blocks of new materials. “Superalkali” clusters because of their ionization energies which lower than alkaline atoms, present the excellent reducing agents; hence, they are recognized as good can-didates for the synthesis of unusually compounds. “Superalkalis”, plays an important role in the chemistry and material science because of their potential to serve as structural units for the assem-bly of novel nanostructured functional materials, such as nonlinear optical materials, hydrogen storage materials, as well as an excellent reduction reagent for decreasing emissions of carbon dioxide, nitrogen oxides, and molecular nitrogen. One way to get a cluster is to use unconventional methods. To date, the mass spectrometry has proven itself a crucial method, which has no alterna-tive, in the field of the production “superalkali” clusters. However, in order to obtain these clus-ters, it is necessary to make modifications of the mass spectrometers available on the market. With-in this paper, the possibilities of obtaining “superalkali” clusters by combining two classical meth-ods of mass spectrometry such as, Knudsen cell and the surface ionization within a magnetic mass spectrometer will be presented. The modified classic surface ionization mass spectrometry has con-firmed to be an efficient and inexpensive method for obtaining these clusters.
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Chen, Kok Hao, and Jong Hyun Choi. "DNA Oligonucleotide-Templated Nanocrystals: Synthesis and Novel Label-Free Protein Detection." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11958.

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Semiconductor and magnetic nanoparticles hold unique optical and magnetic properties, and great promise for bio-imaging and therapeutic applications. As part of their stable synthesis, the nanocrystal surfaces are usually capped by long chain organic moieties such as trioctylphosphine oxide. This capping serves two purposes: it saturates dangling bonds at the exposed crystalline lattice, and it prevents irreversible aggregation by stabilizing the colloid through entropic repulsion. These nanocrystals can be rendered water-soluble by either ligand exchange or overcoating, which hampers their widespread use in biological imaging and biomedical therapeutics. Here, we report a novel scheme of synthesizing fluorescent PbS and magnetic Fe3O4 nanoparticles using DNA oligonucleotides. Our method of PbS synthesis includes addition of Na2S to the mixture solution of DNA sequence and Pb acetate (at a fixed molar ratio of DNA/S2−/Pb2+ of 1:2:4) in a standard TAE buffer at room temperature in the open air. In the case of Fe3O4 particle synthesis, ferric and ferrous chloride were mixed with DNA in DI water at a molar ratio of DNA/Fe2+/Fe3+ = 1:4:8 and the particles were formed via reductive precipitation, induced by increasing pH to ∼11 with addition of ammonium hydroxide. These nanocrystals are highly stable and water-soluble immediately after the synthesis, due to DNA termination. We examined the surface chemistry between oligonucleotides and nanocrystals using FTIR spectroscopy, and found that the different chemical moieties of nucleobases passivate the particle surface. Strong coordination of primary amine and carbonyl groups provides the chemical and colloidal stabilities, leading to high particle yields (Figure 1). The resulting PbS nanocrystals have a distribution of 3–6 nm in diameter, while a broader size distribution is observed with Fe3O4 nanoparticles as shown in Figure 1b and c, respectively. A similar observation was reported with the pH change-induced Fe3O4 particles of a bimodal size distribution where superparamagnetic and ferrimagnetic magnetites co-exist. In spite of the differences, FTIR measurements suggest that the chemical nature of the oligonucleotide stabilization in this case is identical to the PbS system. As a particular application, we demonstrate that aptamer-capped PbS QD can detect a target protein based on selective charge transfer, since the oligonucleotide-templated synthesis can also serve the additional purpose of providing selective binding to a molecular target. Here, we use thrombin and a thrombin-binding aptamer as a model system. These QD have diameters of 3∼6 nm and fluoresce around 1050 nm. We find that a DNA aptamer can passivate near IR fluorescent PbS nanocrystals, rendering them water-soluble and stable against aggregation, and retain the secondary conformation needed to selectively bind to its target, thrombin, as shown in Figure 2. Importantly, we find that when the aptamer-functionalized nanoparticles binds to its target (only the target), there is a highly systematic and selective quenching of the PL, even in high concentrations of interfering proteins as shown in Figure 3a and b. Thrombin is detected within one minute with a detection limit of ∼1 nM. This PL quenching is attributed to charge transfer from functional groups on the protein to the nanocrystals. A charge transfer can suppress optical transition mechanisms as we observe a significant decrease in QD absorption with target addition (Figure 3c). Here, we rule out other possibilities including Forster resonance energy transfer (FRET) and particle aggregation, because thrombin absorb only in the UV, and we did not observe any significant change in the diffusion coefficient of the particles with the target analyte, respectively. The charge transfer-induced photobleaching of QD and carbon nanotubes was observed with amine groups, Ru-based complexes, and azobenzene compounds. This selective detection of an unlabeled protein is distinct from previously reported schemes utilizing electrochemistry, absorption, and FRET. In this scheme, the target detection by a unique, direct PL transduction is observed even in the presence of high background concentrations of interfering negatively or positively charged proteins. This mechanism is the first to selectively modulate the QD PL directly, enabling new types of label free assays and detection schemes. This direct optical transduction is possible due to oligonucleotidetemplated surface passivation and molecular recognition. This chemistry may lead to more nanoparticle-based optical and magnetic probes that can be activated in a highly chemoselective manner.
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Chen, Kok Hao, and Jong Hyun Choi. "Nanoparticle-Aptamer: An Effective Growth Inhibitor for Human Cancer Cells." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11966.

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Semiconductor nanocrystals have unique optical properties due to quantum confinement effects, and a variety of promising approaches have been devised to interface the nanomaterials with biomolecules for bioimaging and therapeutic applications. Such bio-interface can be facilitated via a DNA template for nanoparticles as oligonucleotides can mediate the aqueous-phase nucleation and capping of semiconductor nanocrystals.[1,2] Here, we report a novel scheme of synthesizing fluorescent nanocrystal quantum dots (NQDs) using DNA aptamers and the use of this biotic/abiotic nanoparticle system for growth inhibition of MCF-7 human breast cancer cells for the first time. Particularly, we used two DNA sequences for this purpose, which have been developed as anti-cancer agents: 5-GGT GGT GGT GGT TGT GGT GGT GGT GG-3 (also called, AGRO) and 5-(GT)15-3.[3–5] This study may ultimately form the basis of unique nanoparticle-based therapeutics with the additional ability to optically report molecular recognition. Figure 1a shows the photoluminescence (PL) spectra of GT- and AGRO-passivated PbS QD that fluoresce in the near IR, centered at approximately 980 nm. A typical synthesis procedure involves rapid addition of sodium sulfide in the mixture solution of DNA and Pb acetate at a molar ratio of 2:4:1. The resulting nanocrystals are washed to remove unreacted DNA and ions by adding mixture solution of NaCl and isopropanol, followed by centrifugation. The precipitated nanocrystals are collected and re-suspended in aqueous solution by mild sonication. Optical absorption measurements reveal that approximately 90 and 77% of GT and AGRO DNA is removed after the washing process. The particle size distribution in Figure 1b suggests that the GT sequence-capped PbS particles are primarily in 3–5 nm diameter range. These nanocrystals can be easily incorporated with mammalian cells and remain highly fluorescent in sub-cellular environments. Figure 1c serially presents an optical image of a MCF-7 cell and a PL image of the AGRO-capped QD incorporated with the cell. Figure 1. (a) Normalized fluorescence spectra of PbS QD synthesized with GT and AGRO sequences, which were previously developed as anti-cancer agents. The DNA-capped QD fluoresce in the near IR centered at ∼980 nm. (b) TEM image of GT-templated nanocrystals ranging 3–5 nm in diameter. (c) Optical image of an MCF-7 human breast cancer cell after a 12-hour exposure to aptamer-capped QD. (d) PL image of AGRO-QD incorporated with the cell, indicating that these nanocrystals remain highly fluorescent in sub-cellular environments. One immediate concern for interfacing inorganic nanocrystals with cells and tissue for labeling or therapeutics is their cytotoxicity. The nanoparticle cytotoxicity is primarily determined by material composition and surface chemistry, and QD are potentially toxic by generating reactive oxygen species or by leaching heavy metal ions when decomposed.[6] We examined the toxicity of aptamer-passivated nanocrystals with NIH-3T3 mouse fibroblast cells. The cells were exposed to PbS nanocrystals for 2 days before a standard MTT assay as shown in Figure 2, where there is no apparent cytotoxicity at these doses. In contrast, Pb acetate exerts statistically significant toxicity. This observation suggests a stable surface passivation by the DNA aptamers and the absence of appreciable Pb2+ leaching. Figure 2. Viability of 3T3 mouse fibroblast cells after a 2-day exposure to DNA aptamer-capped nanocrystals. There is no apparent dose-dependent toxicity, whereas a statistically significant reduction in cell viability is observed with Pb ions. Note that Pb acetate at 133 μM is equivalent to the Pb2+ amount that was used for PbS nanocrystal synthesis at maximum concentration. Error bars are standard deviations of independent experiments. *Statistically different from control (p<0.005). Finally, we examined if these cyto-compatible nanoparticle-aptamers remained therapeutically active for cancer cell growth inhibition. The MTT assay results in Figure 3a show significantly decreased growth of breast cancer cells incorporated with AGRO, GT, and the corresponding templated nanocrystals, as anticipated. In contrast, 5-(GC)15-3 and the QDs synthesized with the same sequence, which were used as negative controls along with zero-dose control cells, did not alter cell viability significantly. Here, we define the growth inhibition efficacy as (100 − cell viability) per DNA of a sample, because the DNA concentration is significantly decreased during the particle washing. The nanoparticle-aptamers demonstrate 3–4 times greater therapeutic activities compared to the corresponding aptamer drugs (Figure 3b). We speculate that when a nanoparticle-aptamer is internalized by the cancer cells, it forms an intracellular complex with nucleolin and nuclear factor-κB (NF-κB) essential modulator, thereby inhibiting NF-κB activation that would cause transcription of proliferation and anti-apoptotic genes.[7] The nanoparticle-aptamers may more effectively block the pathways for creating anti-apoptotic genes or facilitate the cellular delivery of aptamers via nanoparticle uptake. Our additional investigation indicates that the same DNA capping chemistry can be utilized to produce aptamer-mediated Fe3O4 nanocrystals, which may be potentially useful in MRI and therapeutics, considering their magnetic properties and biocompatibility. In summary, the nanoparticle-based therapeutic schemes developed here should be valuable in developing a multifunctional drug delivery and imaging agent for biological systems. Figure 3. Anti-proliferation of MCF-7 human breast cancer cells with aptamer-passivated nanocrystals. (a) Viability of MCF-7 cells exposed to AGRO and GT sequences, and AGRO-/GT-capped QD for 7 days. The DNA concentration was 10 uM, while the particles were incubated with cells at 75 nM. (b) Growth inhibition efficacy is defined as (100 − cell viability) per DNA to correct the DNA concentration after particle washing.
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Reports on the topic "Supramolecular chemistry; Molecular recognition"

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Moyer, Bruce a., Debra A. Bostick, Christopher J. Fowler, Hyun-Ah Kang, Alexandre Ruas, Laetitia H. Delmau, Tamara J. Haverlock, et al. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), September 2005. http://dx.doi.org/10.2172/893098.

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Jonathan L. Sessler. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), September 2007. http://dx.doi.org/10.2172/891664.

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Bowman-James, Kristin, George S. Wilson, and Bruce Moyer. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/834750.

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Bowman-James, Kristin, George S. Wilson, and Bruce Moyer. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), June 2002. http://dx.doi.org/10.2172/834752.

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Bowman-James, Kristin, and George S. Wilson. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/834754.

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Bowman-James, Kristin, and Bruce A. Moyer. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/838638.

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Bowman-James, Kristen. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), December 2004. http://dx.doi.org/10.2172/850320.

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Bowman-James, K., G. Wilson, and B. A. Moyer. Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), December 2004. http://dx.doi.org/10.2172/835027.

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Bowman-James, Kristin, and Bruce Moyer. Title: Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), June 1999. http://dx.doi.org/10.2172/827243.

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Sessler, Jonathan L. The Supramolecular Chemistry of Selective Anion Recognition for Anions of Environmental Relevance. Office of Scientific and Technical Information (OSTI), December 2004. http://dx.doi.org/10.2172/850321.

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