Academic literature on the topic 'Polyaromatic molecules'
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Journal articles on the topic "Polyaromatic molecules"
Yazaki, Kohei, Lorenzo Catti, and Michito Yoshizawa. "Polyaromatic molecular tubes: from strategic synthesis to host functions." Chemical Communications 54, no. 26 (2018): 3195–206. http://dx.doi.org/10.1039/c8cc00799c.
Full textHe, Lanyan, Pingmei Wang, Lipeng He, Zhou Qu, Jianhui Luo, Baoliang Peng, Xianqiong Tang, and Yong Pei. "Molecular dynamics simulations of the self-organization of side-chain decorated polyaromatic conjugation molecules: phase separated lamellar and columnar structures and dispersion behaviors in toluene solvent." RSC Advances 8, no. 20 (2018): 11134–44. http://dx.doi.org/10.1039/c7ra13101a.
Full textKartel, M. T., V. V. Lobanov, E. M. Demyanenko, Wang Bo, A. G. Grebenyuk, and O. S. Karpenko. "Sorption of molecular hydrogen on the graphene-like matrix doped by N- and B-atoms." Himia, Fizika ta Tehnologia Poverhni 12, no. 2 (June 30, 2021): 112–23. http://dx.doi.org/10.15407/hftp12.02.112.
Full textMarkevich, Alexander, Simon Kurasch, Ossi Lehtinen, Oliver Reimer, Xinliang Feng, Klaus Müllen, Andrey Turchanin, Andrei N. Khlobystov, Ute Kaiser, and Elena Besley. "Electron beam controlled covalent attachment of small organic molecules to graphene." Nanoscale 8, no. 5 (2016): 2711–19. http://dx.doi.org/10.1039/c5nr07539d.
Full textHagiwara, Keita, Munetaka Akita, and Michito Yoshizawa. "An aqueous molecular tube with polyaromatic frameworks capable of binding fluorescent dyes." Chemical Science 6, no. 1 (2015): 259–63. http://dx.doi.org/10.1039/c4sc02377c.
Full textThomas, Michael, Irene Suarez-Martinez, Li-Juan Yu, Amir Karton, Graham S. Chandler, Marc Robinson, Isabelle Cherchneff, Dahbia Talbi, and Dino Spagnoli. "Atomistic simulations of the aggregation of small aromatic molecules in homogenous and heterogenous mixtures." Physical Chemistry Chemical Physics 22, no. 37 (2020): 21005–14. http://dx.doi.org/10.1039/d0cp02622k.
Full textRumi, Mariacristina, Giuseppe Zerbi, Klaus Müllen, G. Müller, and Matthias Rehahn. "Nonlinear optical and vibrational properties of conjugated polyaromatic molecules." Journal of Chemical Physics 106, no. 1 (January 1997): 24–34. http://dx.doi.org/10.1063/1.473191.
Full textLee, Hwankyu, and Yong-Kul Lee. "Effects of the asphaltene structure and the tetralin/heptane solvent ratio on the size and shape of asphaltene aggregates." Physical Chemistry Chemical Physics 19, no. 21 (2017): 13931–40. http://dx.doi.org/10.1039/c7cp01579h.
Full textTohnai, Norimitsu, Atsushi Yamamoto, Ichiro Hisaki, and Mikiji Miyata. "Hierarchical Construction of Versatile Diamondoid Porous Organic Salts (d-POS)." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C983. http://dx.doi.org/10.1107/s2053273314090160.
Full textMaziarz III, E. Peter, Gary A. Baker, and Troy D. Wood. "Electrospray ionization Fourier transform mass spectrometry of polycyclic aromatic hydrocarbons using silver(I)-mediated ionization." Canadian Journal of Chemistry 83, no. 11 (November 1, 2005): 1871–77. http://dx.doi.org/10.1139/v05-195.
Full textDissertations / Theses on the topic "Polyaromatic molecules"
Al-Muhammad, Ayham. "Synthesis of polyaromatic molecules for applications in organic electronics." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/392946/.
Full textKulisic, Niksa. "Heteroacenes as potential materials for molecular electronics." Doctoral thesis, Università degli studi di Trieste, 2010. http://hdl.handle.net/10077/3609.
Full textIn this thesis, different strategies for obtaining azaacenes suitable for solution-based processing techniques have been investigated and developed. The first synthetic approach involved the condensation of commercially available compounds which include the diamines 2,3-diaminobenzene, 2,3-diaminonaphtalene and 2,3-diaminophenazine and the bromoanilic acid and embelin. This synthetic route yielded a series of dihydroazaacenes with 5 and 7 fused aromatic rings. The low overall solubility of this azaacenes did not permit an extensive characterization of the compounds. A second synthetic approach was developed to investigate both C-N exchange and lateral expansion of the π-conjugation. Through this approach a tetraazaoctacene derivative was obtained and characterized. However it lacked of solubility necessary for being compatible with solution-processing techniques. A third strategy was based on the introduction of solubilizing groups on such extended tetraazaoctacene core. While the di-substitution did not render the azaoctacene soluble in neutral media, tetra-substitution yielded a derivative with enhanced solubility in neutral solvent.
1981
Rolland, de Denus Christine Marie. "Controlled molecular design and polymerization of polyaromatic ethers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23656.pdf.
Full textde, Mendoza Bonmatí Paula. "Design and synthesis of new polyaromatic scaffolds for nano-scale applications." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/9045.
Full textResumen:
En la última década, el diseño y la síntesis de nuevos sistemas poliaromáticos han resultado de gran interés gracias a sus propiedades únicas y sus aplicaciones potenciales para la obtención de dispositivos electrónicos, y como precursores de fullerenos.
Hemos estudiado el mecanismo que procede a través de la activación del enlace C-H en la reacción intramolecular de arilación directa catalizada por paladio, para la formación de sistemas biarílicos, demostrando que la reacción procede a través de la abstracción del protón asistido por la base. Aplicando condiciones optimizadas hemos preparado la molécula C60H24 que al ser irradiada da lugar a la formación del fullereno C60, mediante la reacción de arilación directa formando seis nuevos enlaces C-C en una única etapa.
Además, en una colaboración interdisciplinar con físicos teóricos y experimentales, en el proyecto PicoInside, hemos participado en el diseño y la síntesis de moléculas poliaromáticas para su posterior aplicación como dispositivos electrónicos moleculares.
Abstract:
In the last decade, the design and synthesis of new polyaromatic scaffolds have attracted a broad interest due to their exceptional properties and their potential applications in material science like molecular electronic devices and as precursors of fullerene.
Based in the intramolecular palladium-catalyzed direct arylation reaction we developed new procedures as reliable tools for the biaryl coupling through C-H activation. Insight mechanistic studies showed a proton abstraction mechanism assisted by the base rather than activation of aromatic systems towards electrophilic attack. Applying optimized reaction conditions, formation up to six C-C bonds, and in situ dehydrogenation, allows for the synthesis of C60H24, crushed fullerene in one single step that upon laser irradiation leads to C60 fullerene.
Moreover, in an interdisciplinary collaboration with theoretical and experimental physicist, PicoInside project, we have participated in the design and synthesis of Y-shaped polyaromatic molecules required for single molecule electronic devices.
Silva, Maria João Cerqueira da. "Polyaromatic hydrocarbons in hepatic tissues of Etmopterus pusillus and Galeus melastomus : multibiomarker analysis." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22689.
Full textUm dos maiores ecossistemas do planeta, o marinho, apresenta uma biodiversidade enorme e é uma fonte de diversos recursos naturais. Hoje em dia, este ecossistema tornou-se relevante devido ao facto de ser alvo de inúmeras pressões antropológicas. Os tubarões são um dos predadores que estão no topo das cadeias alimentares marinhas, e estão constantemente a absorver contaminantes como consequência da bioacumulação nas redes tróficas. Etmopterus pusillus e Galeus melastomus no Oceano Atlântico estão a sofrer os efeitos da bioacumulação dos hidrocarbonetos poliaromáticos (PAH´s). Por essa mesma razão, no presente estudo foram avaliados um número de biomarcadores como objetivo de estabelecer uma relação entre os níveis de PAH´s e a ocorrência de stress oxidativo em elasmobrânquios. Na pesca comercial, foram capturados 37 indivíduos de Etmopterus pusillus (23 machos e 14 fêmeas) e 15 indivíduos de Galeus melastomus (todos fêmeas) no Oceano Atlântico, nos arredores da costa de Sesimbra. O tecido hepático foi colhido e congelado a -80°C. As amostras hepáticas foram divididas em três grupos de idade: juvenis, adultos e séniores, separados de acordo com o seu peso e tamanho individual. Neste estudo, alguns PAH´s foram quantificados como, naftaleno, pireno, fenantreno e benzo[a]pireno através do método fluorimétrico. Os PAH´s foram detetados em todas as amostras de tecido hepático dos juvenis, adultos e sénior e em ambas as espécies. Visto que foram detetados níveis de PAH´s, diferentes indicadores de stress oxidativo foram quantificados: atividade da catálase (CAT), catividade da glutationa s-transferase (GST), glutationa total (TG), peroxidação lipídica (LPO), sistema transportador de eletrões (ETS), hidratos de carbono (HC) e lípidos. Nos tecidos hepáticos de Etmopterus pusillus foi observado que CAT, GST e LPO aumentam no grupo dos adultos. Contrariamente, TG , ETS e lipidos diminuem no grupo adulto quando comparados com os juvenis. Relativamente ao Galeus melastomus foi observado que GST e LPO diminuem no grupo dos adultos quando comparados com os juvenis. Como a acumulação de PAH´s nos tecidos hepáticos foi detetada e foram encontradas diferenças significativas nos níveis das defesas antioxidantes, isto pode indicar uma relação entre eles, e um eventual estado de stress oxidativo desta população de elasmobrânquios.
One of the biggest ecosystems on the planet, the marine ecosystem, represents huge diversity and is a source of many different natural resources. Today, this ecosystem has become relevant due to the fact that planet ecosystems are a target of several anthropogenic pressures. Sharks are one of the top predators in marine food chain, constantly absorbing contaminants as a consequence of bioaccumulation on trophic nets. Etmopterus pusillus and Galeus melastomus in the Atlantic Ocean are suffering the effects of polyaromatic hydrocarbons (PAH´s) bioaccumulation. For that reason, in the present report were evaluated a number of different biomarkers in order to stablish the relationship between PAH´s levels and the occurrence of oxidative stress in elasmobranchs. In commercial fishing, 37 individuals of Etmopterus pusillus (23 males and 14 females) and 15 individuals of Galeus melastomus (all females) were captured in the Atlantic Ocean, off the coast of Sesimbra. Hepathic tissue was collected and frozen at -80°C. Hepathic samples were split into three age groups: juveniles, adults and seniors, split according to the specimen’s total weight and size. In this study, several PAH´s were quantified, such as naphthalene, pyrene, phenanthrene and benzo[a]pyrene content by a fluorimetric method. PAH´s were detected in hepathic tissue samples of juveniles, adults and seniors group in both species. Since PAH´s accumulation in liver tissue were detected, different stress oxidative parameters were quantified: catalase activity (CAT), glutathione stransferase activity (GST), total glutathione (TG), lipid peroxidation (LPO), electron transport system (ETS), hydrocarbons (HC) and lipids. In hepathic tissue of Etmopterus pusillus it was observed that CAT, GST and LPO increased in adult group. Conversely, TG, ETS and lipids decreased in adult group when compared with juvenile group. Relatively to Galeus melastomus, it was observed that GST and LPO decreased in adult group when compared with juvenile group. As PAH´s accumulation in hepathic tissues were detected and significant differences in antioxidant defense levels were found, it might indicate a relationship between them, and eventually an oxidative stress state of elasmobranch´s population.
Benigni, Paolo. "Trapped Ion Mobility Spectrometry coupled to Fourier Transform Ion Cyclotron Resonance Mass Spectrometry for the analysis of Complex Mixtures." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3547.
Full textLe, Maître Johann. "Développement de la spectrométrie de masse à ultra- haute résolution associée à la spectrométrie de mobilité ionique pour la caractérisation de coupes pétrolières lourdes. structural analysis of heavy oil fractions afterr hydrodenitrogenation by high-resolution tandem mass spectrometry and ion mobility spectrometry Structural analysis of neutral nitrogen compounds refractory to the hydrodenitrogenation process of heavy oil fractions by high-resolution tandem mass spectrometry and ion mobility-mass spectrometry Chemical characterization of 15 biocrudes obtained from hydrothermal liquefaction of industrially cultivated wild micro algae Chemical characterization with different analytical techniques, a way to understand the process: Case of the paraffinic base oil production line Exploring complex mixtures by cyclic ion mobility high-resolution mass spectrometry – Application towards Petroleum. Simulation and modeling of Collision Cross Section for structural elucidation of heavy oil fraction by ion mobility-mass spectrometry: Using polyaromatic hydrocarbons compounds mixture as calibration standard Characterization of sulfoxides compounds in dimeric distribution of heavy oil fractions by positive-ion electrospray ionization FTICR mass spectrometry Structural analysis of Petroporphyrins from asphaltene by trapped ion mobility coupled with a Fourier transform ion cyclotron resonance mass spectrometer. Cyclic ion mobility spectrometry coupled to high-resolution time-of-flight mass spectrometry equipped with atmospheric solid analysis probe for the molecular characterization of combustion particulate matter. Structural study of analogues of Titan’s haze by trapped ion mobility coupled with a Fourier transform ion cyclotron mass spectrometer." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMR051.
Full textThe evolution of oil reserves requires the use in refineries of unconventional crude oils, which are often heavier and therefore difficult to characterize. Petroleum products are in fact extremely complex chemical mixtures. The light and volatile part can be analysed by gas chromatography coupled with mass spectrometry (GC/MS), allowing the identification of compounds by using precise mass measurements and fragmentation models. However, these techniques are inappropriate for the analysis of heavy fractions. In practice, the characterization of the most complex mixtures involves the use of ultra-high-resolution mass spectrometers generally by direct analysis without chromatographic separation. The reference technique today is Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR). With a resolution of more than 106 and a mass measurement accuracy of less than 0.1 ppm, this instrument can separate all the species present in a petroleum product and assign a unique elemental composition to each m/z value. This makes it very easy to obtain molecular maps that can be presented graphically using the Kendrick diagram, the van Krevelen diagram or the number of unsaturations (DBE) as a function of the number of carbons. This thesis work has allowed thanks to the molecular characterization of petroleum products (Vacuum Gas Oil, Crude Oil, Interfacial Material, Asphaltenes and Bio-Oil...) addressing the complexity of their treatment in the refining tool. Protocols for sample analysis have been developed, using different sources of ionization at atmospheric pressure (ESI, APCI and APPI) as well as laser desorption/ionization (LDI) on the FTICR 12T mass spectrometer. Information on the isomeric content of petroleum products was then determined using ion mobility spectrometry (IMS)
Book chapters on the topic "Polyaromatic molecules"
Jacquot de Rouville, Henri-Pierre, Romain Garbage, Agnès M. Sirven, Claire Kammerer, and Gwénaël Rapenne. "Triptycene or Subphthalocyanine Wheels and Polyaromatic Hydrocarbon Nanovehicles." In Single Molecular Machines and Motors, 65–79. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-13872-5_4.
Full text"Structure, texture, and thermal behaviour of polyaromatic solids Marc Monthioux." In Carbon Molecules and Materials, 143–94. CRC Press, 2002. http://dx.doi.org/10.1201/b16832-7.
Full textSawada, Tsuyoshi, Shingo Kubo, and Kazuaki Nanamura. "Chirality and Circular Polarized Properties of Photochromic Polyaromatic Molecules." In Chirality from Molecular Electronic States. IntechOpen, 2019. http://dx.doi.org/10.5772/intechopen.81880.
Full textSaraswat, Pooja, Kritika Yadav, Anamika Gupta, Mrinalini Prasad, and Rajiv Ranjan. "Physiological and molecular basis for remediation of polyaromatic hydrocarbons." In Handbook of Bioremediation, 535–50. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-12-819382-2.00034-x.
Full textConference papers on the topic "Polyaromatic molecules"
Davari, N., P. O. Astrand, and M. Unge. "Field-dependent ionization potential for polyaromatic molecules from constrained density-functional theory." In 2014 IEEE 18th International Conference on Dielectric Liquids (ICDL). IEEE, 2014. http://dx.doi.org/10.1109/icdl.2014.6893142.
Full textSavchenkova, A. S., A. S. Semenikhin, I. V. Chechet, S. G. Matveev, M. Frenklach, and A. M. Mebel. "DIMERIZATION OF POLYAROMATIC HYDROCARBON MOLECULES WITH FORMATION OF E-BRIDGE BOND: A THEORETICAL STUDY." In 9TH INTERNATIONAL SYMPOSIUM ON NONEQUILIBRIUM PROCESSES, PLASMA, COMBUSTION, AND ATMOSPHERIC PHENOMENA. TORUS PRESS, 2020. http://dx.doi.org/10.30826/nepcap9a-13.
Full textWright, John C. "Applications of Linear and Nonlinear Site Selective Spectroscopy to Chemical Measurements." In Laser Applications to Chemical Analysis. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/laca.1987.tha5.
Full textJian, Cuiying, and Tian Tang. "Nanorods self-assembled from polyaromatic compounds: A molecular dynamics study [1]." In 2015 IEEE Nanotechnology Materials and Devices Conference (NMDC). IEEE, 2015. http://dx.doi.org/10.1109/nmdc.2015.7439271.
Full text"Effects caused by vacancies in carbon nanocluster C96 and polyaromatic molecule C96H24." In Chemical technology and engineering. Lviv Polytechnic National University, 2021. http://dx.doi.org/10.23939/cte2021.01.044.
Full textCollis, Gavin E. "Designing small molecule polyaromatic p- and n-type semiconductor materials for organic electronics." In SPIE Micro+Nano Materials, Devices, and Applications, edited by Benjamin J. Eggleton and Stefano Palomba. SPIE, 2015. http://dx.doi.org/10.1117/12.2202565.
Full textSharma, Vaishali, Shweta D. Dabhi, Satyam Shinde, and Prafulla K. Jha. "Tuning electronic properties of graphene nanoflake polyaromatic hydrocarbon through molecular charge-transfer interactions." In INTERNATIONAL CONFERENCE ON NANOMATERIALS FOR ENERGY CONVERSION AND STORAGE APPLICATIONS: NECSA 2018. Author(s), 2018. http://dx.doi.org/10.1063/1.5035233.
Full textMisono, Masatoshi, Masaaki Baba, Shunji Kasahara, and Sho Yamasaki. "HIGH-RESOLUTION SPECTROSCOPY OF POLYAROMATIC HYDROCARBONS WITH A SINGLE MODE TI:SAPPHIRE LASER DISCIPLINED BY AN OPTICAL FREQUENCY COMB." In 74th International Symposium on Molecular Spectroscopy. Urbana, Illinois: University of Illinois at Urbana-Champaign, 2019. http://dx.doi.org/10.15278/isms.2019.mj04.
Full textChen, Shaohua, Ming Han, Abdulkareem AlSofi, and Tianping Huang. "A Novel Chemical Formulation for Heavy Oil Viscosity Reduction and Heavy Oil Displacement." In Middle East Oil, Gas and Geosciences Show. SPE, 2023. http://dx.doi.org/10.2118/213402-ms.
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