Log in

Relevant bibliographies by topics / Conjugated and cumulated molecules

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Conjugated and cumulated molecules'

Author: Grafiati

Published: 18 May 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Conjugated and cumulated molecules.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Conjugated and cumulated molecules"

1

Sarbadhikary, Prodipta, Suranjan Shil, and Anirban Misra. "Magnetic and transport properties of conjugated and cumulated molecules: the π-system enlightens part of the story." Physical Chemistry Chemical Physics 20, no. 14 (2018): 9364–75. http://dx.doi.org/10.1039/c7cp06113g.

Full text

Abstract:

We have investigated the intramolecular magnetic exchange coupling constants (J) for a series of nitronyl nitroxide diradicals connected by a range of linear conjugated and cumulene couplers focusing on the unusual π-interaction properties within the couplers.

APA, Harvard, Vancouver, ISO, and other styles

2

Horká, Petra, Vladimír Vrkoslav, Jiří Kindl, Karolina Schwarzová-Pecková, and Josef Cvačka. "Structural Characterization of Unusual Fatty Acid Methyl Esters with Double and Triple Bonds Using HPLC/APCI-MS2 with Acetonitrile In-Source Derivatization." Molecules 26, no. 21 (October 26, 2021): 6468. http://dx.doi.org/10.3390/molecules26216468.

Full text

Abstract:

Double and triple bonds have significant effects on the biological activities of lipids. Determining multiple bond positions in their molecules by mass spectrometry usually requires chemical derivatization. This work presents an HPLC/MS method for pinpointing the double and triple bonds in fatty acids. Fatty acid methyl esters were separated by reversed-phase HPLC with an acetonitrile mobile phase. In the APCI source, acetonitrile formed reactive species, which added to double and triple bonds to form [M + C3H5N]+• ions. Their collisional activation in an ion trap provided fragments helpful in localizing the multiple bond positions. This approach was applied to fatty acids with isolated, cumulated, and conjugated double bonds and triple bonds. The fatty acids were isolated from the fat body of early-nesting bumblebee Bombus pratorum and seeds or seed oils of Punicum granatum, Marrubium vulgare, and Santalum album. Using the method, the presence of the known fatty acids was confirmed, and new ones were discovered.

APA, Harvard, Vancouver, ISO, and other styles

3

Renard, Emma, Olivier Raguin, Victor Goncalves, Celine Mothes, Mathieu Moreau, Claire Bernhard, Peggy Provent, et al. "Abstract 1401: Lead optimization of radiopharmaceuticals for molecular radiotherapy and preclinical evaluation." Cancer Research 82, no. 12_Supplement (June 15, 2022): 1401. http://dx.doi.org/10.1158/1538-7445.am2022-1401.

Full text

Abstract:

Abstract Molecular Radiotherapy (MRT) targeting SSTR2 or PSMA have proven to be highly efficient for the treatment of neuroendocrine or metastatic prostate cancer, respectively. Beyond the leading radiopharmaceutical molecules 177Lu-DOTATATE or 177Lu-PSMA-617, a variety of vectors (small molecules, peptides, panel of biologics) have been developed on the same targets in order to improve the biodistribution within the tumor, the blood clearance, the route of elimination or the dosimetry. The labeling of the targeting ligand, whatever its nature, is a crucial step as it may affect significantly the properties of the theranostic conjugate, i.e. its binding affinity, PK and biodistribution. The addition of linkers, such as albumin binding domain or PEG, and choice of chelating agents have a major impact on the chemical and biological properties of the vectors. Random or site-specific bioconjugation, click chemistry, also have to be considered in the early stage as the choice of the selected technology will modify your development plan and manufacturing. New ligands and biological platforms are now being developed based on this historical knowledge, improved Target Product Profiles are built to conduct optimal lead optimization of MRT. Herein, we will present our lead optimization and preclinical evaluation process to select efficiently good radiolabeled molecules and list the key parameters to be checked. To date, it remains hard to predict the behavior of the modified bioconjugated molecules, and versatile synthesis strategies are needed to screen various combinations of radiometal complexes, linker and conjugation function, in order to converge rapidly to the optimized bioconjugate. As an example, we will present a study case where the conjugation of various bifunctional chelating agents on a small NTS1 receptor antagonist resulted in drastically different in vivo behavior of the resulting 68Ga-labeled compounds. Once optimal in vivo tumor uptake has been achieved, preclinical evaluation requires the selection of appropriate and relevant models, driven by target expression, radioresistance, and potentially tumor immune infiltrate for combination studies with immunotherapies. The therapeutic evaluation should take into consideration the dose and specific activity, the tolerance of a model related to ionizing radiations and the scheduling of treatments (cumulated dose, fractionation). We will present our recent results which highlight the importance to optimize these parameters to improve the efficacy of MRT. Citation Format: Emma Renard, Olivier Raguin, Victor Goncalves, Celine Mothes, Mathieu Moreau, Claire Bernhard, Peggy Provent, Frederic Boschetti, Franck Denat, Fabrice Viviani, Cyril Berthet. Lead optimization of radiopharmaceuticals for molecular radiotherapy and preclinical evaluation [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 1401.

APA, Harvard, Vancouver, ISO, and other styles

4

van Dongen, J. P. C. M., A. J. de Jong, H. A. Selling, P. P. Montijn, J. H. van Boom, and L. Brandsma. "Isomerization of conjugated and cumulated systems." Recueil des Travaux Chimiques des Pays-Bas 86, no. 10 (September 2, 2010): 1077–81. http://dx.doi.org/10.1002/recl.19670861008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Schonk, Ruud M., Bert H. Bakker, and Hans Cerfontain. "Reactions of cumulated and conjugated dienes with sulfur trioxide." Recueil des Travaux Chimiques des Pays-Bas 112, no. 3 (September 2, 2010): 201–9. http://dx.doi.org/10.1002/recl.19931120301.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Zhu, Xiao-Qing, Hao Liang, Yan Zhu, and Jin-Pei Cheng. "Hydride Affinities of Cumulated, Isolated, and Conjugated Dienes in Acetonitrile." Journal of Organic Chemistry 73, no. 21 (November 7, 2008): 8403–10. http://dx.doi.org/10.1021/jo801536m.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

H. Muhammad, G. Tastemirova, and K. Abdibekova. "STRUCTURES OF ALKANDIENES IN HYDROCARBONS." Bulletin of Toraighyrov University. Chemistry & Biology series, no. 4.2022 (December 28, 2022): 19–33. http://dx.doi.org/10.48081/rglj8585.

Full text

Abstract:

"Alkadienes have been under study for a long time, until the last decade of the 19th century, various structures have been known, each structure represents the specific chemical properties of the compound, alkadienes structures are the first important step for better identification of these compounds, by identifying the structures, different types of alkadienes can be distinguished from each other. Also, the structures of alkadienes and important synthetic compounds are of great value in industry and medicine. Conjugated, isolated, and cumulated structures have been identified by different people at different times in alkadienes. Compounds of alkadienes i.e. conjugated, isolated and cumulated alkadienes have chain and cyclic structures, alkadienes are used as medicine to treat some deadly diseases, for example Taxol in 1960, Jonathan Hartwell in the United States collected some plants such as pacific yew for the treatment of breast cancer. Also, in the 19th century, synthetic and natural polymers of alkadienes were widely used in the tire industry, in general, alkadienes are compounds that have two carbon-carbon double bonds (π) in their composition, that is why they are very active compounds, it is widely used in industry all over the world and they have caused the development of the world’s economy and industry. Keywords: Alkadienes, Nomenclature of alkadienes, Conjugated alkadienes, stability of conjugated alkadienes, Ultraviolet spectroscopy. "

APA, Harvard, Vancouver, ISO, and other styles

8

Nuckolls, Colin, Thomas J. Katz, and Louis Castellanos. "Aggregation of Conjugated Helical Molecules." Journal of the American Chemical Society 118, no. 15 (January 1996): 3767–68. http://dx.doi.org/10.1021/ja960145z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Dias, Jerry Ray. "Almost-isospectral conjugated polyene molecules." Chemical Physics Letters 253, no. 3-4 (May 1996): 305–12. http://dx.doi.org/10.1016/0009-2614(96)00258-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Fox, J., Z. Dong, X. Liu, and G. Yap. "Parallel Alignment of Conjugated Rod Molecules." Synfacts 2007, no. 4 (April 2007): 0384. http://dx.doi.org/10.1055/s-2007-968319.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Conjugated and cumulated molecules"

1

Sarbadhikary, Prodipta. "Magnetic and transport properties of spin polarized molecular systems: theoretical perspective." Thesis, University of North Bengal, 2021. http://ir.nbu.ac.in/handle/123456789/4668.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

O'Connor, M. P. "Electronic properties of conjugated molecules." Thesis, Lancaster University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379188.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Samori, Paolo. "Self-assembly of conjugated (macro)molecules." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2000. http://dx.doi.org/10.18452/14604.

Full text

Abstract:

In dieser Dissertation wird die Selbstorganisation von pi-konjugierten (makro)molekularen Architekturen durch Chemisorption oder Physisorption in hochgeordnete supramolekulare nanoskopische und mikroskopische Strukturen auf festen Trägern untersucht. Ihre Struktur und Dynamik wurden auf molekularer Skala hauptsächlich mit Rastersondenmikroskopien, insbesondere mit Rastertunnel- und Rasterkraftmikroskopie, untersucht. Dies erlaubte die Charakterisierung einer Reihe von Phänomenen, die sowohl an Fest-Flüssig-Grenzflächen auftreten, wie beispielsweise die Dynamik der einzelnen molekularen Nanostäbchen (Ostwald Reifung) und die Fraktionierung steifer Polymerstäbchen durch Physisorption an der Grafitoberfläche aus der Lösung heraus, als auch in trockenen Filmen vorkommen wie die Selbstorganisation steifer Polymerstäbchen zu Nanobändern mit molekularen Querschnitten, die sich epitaktisch auf Oberflächen orientieren lassen und auch die Ausbildung gestapelter Architekturen von diskförmigen Molekülen. Außerdem wurden die elektronischen Eigenschaften der untersuchten Systeme mit Hilfe von Photoelektronenspektroskopie charakterisiert. Die entwickelten Nanostrukturen sind nicht nur für Nanokonstruktionen auf festen Oberflächen von Interesse, sondern besitzen auch Eigenschaften, die sie für Anwendungen in einer zukünftigen molekularen Elektronik prädestiniert, etwa für den Aufbau molekularer Drähte.
In this thesis the self-assembly of pi-conjugated (macro)molecular architectures, either through chemisorption or via physisorption, into highly ordered supramolecular nanoscopic and microscopic structures has been studied. On solid substrates structure and dynamics has been investigated on the molecular scale making use primarily of Scanning Probe Microscopies, in particular Scanning Tunneling Microscopy and Scanning Force Microscopy. This allowed to characterize a variety of phenomena occurring both at the solid-liquid interface, such as the dynamics of the single molecular nanorods (known as Ostwald ripening), the fractionation of a solution of rigid-rod polymers upon physisorption on graphite; and in dry films, i.e. the self-assembly of rigid-rod polymers into nanoribbons with molecular cross sections which can be epitaxially oriented at surfaces and the formation ordered layered architectures of disc-like molecules. In addition the electronic properties of the investigated moieties have been studied by means of Photoelectron Spectroscopies. The nanostructures that have been developed are not only of interest for nanoconstructions on solid surfaces, but also exhibit properties that render them candidates for applications in the field of molecular electronics, in particular for building molecular nanowire devices.

APA, Harvard, Vancouver, ISO, and other styles

4

Winfield, Jessica Mary. "Spectroscopy of conjugated polymers and small molecules." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611577.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Wildman, Jack. "Molecular dynamics simulations of conjugated semiconducting molecules." Thesis, Heriot-Watt University, 2017. http://hdl.handle.net/10399/3261.

Full text

Abstract:

In this thesis, we present a study of conformational disorder in conjugated molecules focussed primarily on molecular dynamics (MD) simulation methods. Along with quantum chemical approaches, we develop and utilise MD simulation methods to study the conformational dynamics of polyfluorenes and polythiophenes and the role of conformational disorder on the optical absorption behaviour observed in these molecules. We first report a classical force-field parameterisation scheme for conjugated molecules which defines a density functional theory method of accuracy comparable to high-order ab-initio calculations. In doing so, we illustrate the role of increasing conjugated backbone and alkyl side-chain length on inter-monomer dihedral angle potentials and atomic partial charge distributions. The scheme we develop forms a minimal route to conjugated force-field parameterisation without substantial loss of accuracy. We then present a validation of our force-field parameterisation scheme based on self-consistent measures, such as dihedral angle distributions, and experimental measures, such as persistence lengths, obtained from MD simulations. We have subsequently utilised MD simulations to investigate the interplay of solvent and increasing side-chain lengths, the emergence of conjugation breaks, and the wormlike chain nature of conjugated oligomers. By utilising MD simulation geometries as input for quantum chemical calculations, we have investigated the role of conformational disorder on absorption spectral broadening and the formation of localised excitations. We conclude that conformational broadening is effectively independent of backbone length due to a reduction in the effect of individual dihedral angles with increasing length and also show that excitation localisation occurs as a result of large dihedral angles and molecular asymmetry.

APA, Harvard, Vancouver, ISO, and other styles

6

Jäckel, Frank. "Self-Assembly and Electronic Properties of Conjugated Molecules." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2005. http://dx.doi.org/10.18452/15267.

Full text

Abstract:

Die Verwendung einzelner Moleküle als aktive Elemente elektronischer Bauteile wird derzeit als potentielle Alternative zur halbleiterbasierten Nanoelektronik angesehen, da einzelne Moleküle a priori nur einige Nanometer groß sind. Auß erdem kann dabei eventuell eine vereinfachte Verarbeitung und Herstellung der Bauteile erreicht werden. In dieser Arbeit werden das Selbstaggregationsverhalten und die Elektrontransporteigenschaften konjugierter Moleküle mit Rastertunnelmikroskopie (RTM) und -spektroskopie (RTS) an einer Fest-Flüssig-Grenzfläche und unter Ultrahochvakuumbedingungen bei tiefen Temperaturen untersucht. Ihre mögliche Verwendung in hybrid-molekularen Bauteilen als auch Ansätze für eine mono-molekulare Elektronik werden erkundet. Insbesondere wird die Nano-Phasenseparation von Elektron-Donor-Akzeptor-Multiaden an der Fest-Flüssig-Grenzfläche demonstriert, die zur Integration verschiedener elektronischer Funktionen auf der Nanoskala benutzt werden kann. Desweiteren wird die Abhängigkeit der elektronischen Kopplung scheibenförmiger gestapelter Moleküle vom lateralen Versatz innerhalb des Stapels experimentell nachgewiesen. Dies eröffnet neue Möglichkeiten die elektronischen Eigenschaften solcher dreidimensionaler Architekturen gezielt zu beeinflussen. Außerdem werden die ersten RTM/RTS-Untersuchungen von Ladungstransferprozessen in einzelnen organischer Donor-Akzeptor-Komplexe präsentiert. Schließlich werden die Ladungstransferkomplexe mit dem Ansatz der Nano-Phasenseparation kombiniert, um den ersten Einzelmolekültransistor mit intergrierten Nanogates zu realisieren. In diesem prototypischen Bauteil wird die Strom-Spannungs-Kennlinie einer hybrid-molekularen Diode, die aus einem Hexa-peri-hexabenzocoronen (HBC) im Tunnelspalt eines RTMs besteht, durch einen kovalent an das HBC gebundenen Ladungstransferkomplex modifiziert. Dies wird als wichtiger Schritt in Richtung einer mono-molekularen Elektronik angesehen.
The use of single molecules as active components in electronic devices is presently considered a potential alternative to semiconductor-based nano-scale electronics since it directly provides precisely-defined nano-scale components for electronic devices which eventually allows for simple processing and devicefabrication. In this thesis the self-assembly and electron transport properties of conjugated molecules are investigated by means of scanning tunneling microscopy (STM) and spectroscopy (STS) at solid-liquid interfaces and under ultrahigh vacuum conditions and low temperatures. The use of the molecules in hybrid-molecular electronic devices and potential approaches to a mono-molecular electronics are explored. In particular, electron-donor-acceptor-multiads are shown to exhibit a nano-phase-segregation at the solid-liquid interface which allows for the integration of different electronic functions at the nano-scale. Furthermore, the dependence of the electronic coupling of stacked disk-like molecules on the lateral off-set in the stack is demonstrated experimentally which offers new possibilities for the control of the electronic properties of these three-dimensional architectures. In addition the first STM/STS experiments on charge transfer in single organic donor-acceptor complexes are presented. Finally, charge transfer complexes are combined with the approach of nano-phase-segregation to realize the first single-molecule transistor with integrated nanometer-sized gates. In this prototypical device the current through a hybrid-molecular diode made from a hexa-peri-hexabenzocoronene (HBC) in the junction of the STM is modified by charge transfer complexes covalently attached to the HBC in the gap. Since the donor which complexes the covalently attached acceptor comes from the ambient fluid the set-up represents a single-molecule chemical field-effect transistor with nanometer-sized gates. This is considered a major step towards mono-molecular electronics.

APA, Harvard, Vancouver, ISO, and other styles

7

Vogel, Jörn-Oliver. "Co-deposited films of rod-like conjugated molecules." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2009. http://dx.doi.org/10.18452/15978.

Full text

Abstract:

In dieser Arbeit wird die Phasenseparation und Mischung zwischen konjugierten Stäb-chenmolekülen in dünnen Filmen untersucht. Hauptaugenmerk liegt darauf zu ergrün-den welche molekularen Eigenschaften zu Mischung und/ oder Phasenseparation füh-ren. Mit den 5 Molekülen Pentacen (PEN), Quaterthiophen (4T), Sexithiophen (6T), p-Sexiphenylen (6P), alpha,omega-Dihexylsexithiophen (DH6T) werden Materialpaare zusammen gestellt, die sich in den Parametern „optische und elektrische Eigenschaf-ten“, „Länge des konjugierten Kerns“ und Alkylkettensubstitution unterscheiden. Alle Schichten werden mittels organischer Molekularstrahlabscheidung auf die Substrate Siliziumoxid und Mylar, einer PET Folie, simultan von zwei Quellen aufgedampft. Das Mischungsverhältnis wird mittels der individuellen Aufdampfraten eingestellt und eine Gesamtrate von 0.5 nm/min eingehalten. Es wird Phasenseparation für Materialpaare mit ungleicher konjugierter Kernlänge, z.B. [4T/6T], beobachtet. Erstaunlicherweise führt die Co-Verdampfung von Molekülpaaren mit ähnlicher konjugierter Kernlänge [4T/PEN] und [6T/6P] zu wohlgeordneten Fil-men, in denen die Moleküle in gemischten Lagen parallel zur Substratoberfläche auf-wachsen und die Längsachse der Moleküle fast senkrecht zur Substratoberfläche orien-tiert ist. Molekülpaare mit ähnlicher konjugierter Kernlänge und Alkylsubstitution [6T/DH6T] und [6P/DH6T] zeigten ebenfalls geordneten Schichten, wobei als Besonderheit eine lineare Abhängigkeit des Lagenabstandes vom DH6T-Gehalt zu beobachten ist. Dies wird mit einer Phasenseparation in eine aromatische und eine alkyl Domäne erklärt. Mit abnehmendem DH6T-Gehalt im Film ist die Alkyldomäne weniger dicht gepackt, was auf Grund der Flexibilität der Alkylketten zu einer Abnahme des gesamten Lagenab-standes führt. Die besonders geringe Oberflächenrauhigkeit und die miteinander verbundenen Inseln der [DH6T/6T] Filme prädestinieren sie zur Verwendung in Feldeffekttransistoren. Es wird gezeigt, dass es möglich ist, die Ladungsträgerdichte im Kanal durch Änderung des Verhältnisses zwischen DH6T und 6T so zu verändern, dass der Transistor im Verar-mungs- oder Anreicherungsregime betrieben werden kann. Dabei bleibt die Ladungsträ-germobilität auf gleich bleibend hohem Niveau. Dies entspricht dem Dotieren eines anorganischen Halbleiters.
This thesis is centered on studies of phase separation and mixing in co-deposited thin films of rod-like conjugated molecules. The main focus is to determine which molecular properties lead to phase separation and/or mixing of two materials. To address this question I used five materials, of importance in the context of “organic electronics”: pentacene (PEN), quaterthiophene (4T), sexithiophene (6T), p-sexiphenylene (6P), alpha,omega-dihexylsexithiophene (DH6T). With these it was possible to form material pairs which differ in the parameters: energy levels, length of the conjugated core, and alkyl-end-chain-substitution. All films were deposited by organic molecular beam deposition onto the chemically inert substrates silicon oxide and Mylar, a polyethylene terephthalate (PET) foil. The material pairs were deposited simultaneously from two thermal sublima-tion sources. The mixing ratio was controlled by the individual deposition rates, which were measured online by a microbalance. The total deposition rate was 0.5 nm/min, and the film thicknesses ranged from 4 nm to 40 nm. Phase separation is observed for material pairs with dissimilar conjugated core sizes, i.e. [4T/6T]. Noteworthy, the co-deposition of material pairs with similarly sized conju-gated cores [4T/PEN] and [6T/6P] lead to well ordered layered structures. The mole-cules show mixing within layers on a molecular scale and the long molecular axis is ori-ented almost perpendicular to the substrate surface. Material pairs with similarly sized conjugated core and alkyl-end-chain-substitution [6T/DH6T] and [6P/DH6T] show also growth in mixed layered structures. An especially appealing fact is that the interlayer distance increases proportional to the DH6T content in the film. This can be explained with a phase separation into an aromatic and an alkyl domain vertically to the substrate surface. A decrease of the DH6T content in the film leads to a less dense packing in the alkyl domain. This leads, due to the flexibility of the alkyl chains, to a decrease of the overall interlayer distance. The low surface corrugation and the interconnected islands render the material pair [6T/DH6T] well suitable for the use as active layer in organic field effect transistors. It is shown that it is possible to tune the charge carrier density in the channel by changing the ratio between 6T and DH6T. This effect enables switching the transistor from en-hancement to depletion mode, while maintaining a high charge carrier mobility. This is comparable to p-type doping of inorganic semiconductors.

APA, Harvard, Vancouver, ISO, and other styles

8

Samorí, Paolo. "Self-assembly of conjugated (macro)molecules nanostructures for molecular electronics /." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962281530.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Wright, Helen. "Fused ring conjugated polymers and small molecules for organic-semiconductors." Thesis, University of Manchester, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542784.

Full text

Abstract:

Fused ring structures such as cyclopentadithiophenes (CPDT), fluorenes and dithienopyrroles have been shown to have low band gaps and extended conjugation lengths. Both of these properties make them interesting materials for organic semiconductor applications. It has been shown that increasing the planarity of building blocks, and in turn the polymer or molecule they are contained within, can improve charge transport by increasing π-π stacking. While the homo-polymers of dithienopyrrole, and alkene bridged CPDT and fluorene have low band gaps, it is possible to further reduce them by forming co-polymers, either by combination with an acceptor unit or by increasing the planarity of the polymer. Three families of small molecules and corresponding co-polymers were therefore synthesised using three main building blocks - alkene bridged CPDT, alkylidene fluorene and dithienopyrrole - combined with a series of co-monomers. In the cases of CPDT and dithienopyrrole two different alkyl chains were used with the aim of influencing solubility and solid-state packing. The optical and electrochemical properties were studied and trends determined. In addition physical and thermal properties were studied and for several of the small molecules, crystal structures and theoretical structures were also evaluated to probe intermolecular interactions in the solid state.During the synthesis of one alkylidene fluorene small molecule an unexpected impurity was isolated in which the bridging alkene of the fluorene had rearranged. Possible reasons for the formation were investigated and the properties of the compound studied.Several small molecules and one co-polymer were incorporated into preliminary OFET devices, although performance was limited by poor film formation. Film forming studies were also undertaken on the co-polymer.

APA, Harvard, Vancouver, ISO, and other styles

10

Wiebeler, Christian [Verfasser]. "Photophysics and photochemistry of conjugated systems and photochromic molecules / Christian Wiebeler." Paderborn : Universitätsbibliothek, 2015. http://d-nb.info/1073201570/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Conjugated and cumulated molecules"

1

Pietila, Lars-Olof. Molecular mechanics and force field studies of weakly coupled conjugated molecules and molecular crystals. Helsinki: Societas Scientiarum Fennica, 1988.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Eland, John H. D., and Raimund Feifel. Conjugated and aromatic molecules. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198788980.003.0006.

Full text

Abstract:

In the vast majority of conjugated and aromatic molecules, the outermost occupied orbitals are either of π‎ character or non-bonding lone pairs belonging to heteroatoms. These are the orbitals from which double ionisation gives rise to most of the distinct bands that can be discerned in their spectra. Double photoionisation spectra of ethylene, butadiene, pyrrole, furan, thiophene, benzene, hexafluorobenzene, toluene, pyridine, pyrazine, pyrimidine, pyridazine, naphthalene, azulene, quinoline, biphenyl, TDME, iron pentacarbonyl, ferrocene, and TMPPD are presented with analysis where possible. The effects of inner valence Auger effects are also emphasised, which can greatly increase the intensity of double photoionisation. In this chapter, the molecules are ordered mainly in the usual way by number of atoms, then by molecular weight, but the authors have put closely related molecules together where possible.

APA, Harvard, Vancouver, ISO, and other styles

3

Daudel, Raymond. Electronic Structure of Molecules: Diatomic Molecules, Small Molecules, Saturated Hydrocarbons, Conjugated Molecules, Molecules of Biochemical Interest. Elsevier Science & Technology Books, 2017.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Chen, Pengle, and Bin Wu, eds. Functional Supramolecular Nanoassemblies of Π-Conjugated Molecules. Frontiers Media SA, 2020. http://dx.doi.org/10.3389/978-2-88963-360-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Graovac, A., I. Gotman, and N. Trinajstic. Topological Approach to the Chemistry of Conjugated Molecules. Springer, 2012.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Conjugated and cumulated molecules"

1

Gutman, Ivan, and Oskar E. Polansky. "Thermodynamic Stability of Conjugated Molecules." In Mathematical Concepts in Organic Chemistry, 135–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70982-1_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Delysse, S., J. M. Nunzi, P. Raimond, and F. Kajzar. "Nonlinear Spectroscopy in Conjugated Molecules." In Electrical and Related Properties of Organic Solids, 339–58. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5790-2_20.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Yergey, Alfred L., Charles G. Edmonds, Ivor A. S. Lewis, and Marvin L. Vestal. "LC/MS of Conjugated Molecules." In Liquid Chromatography/Mass Spectrometry, 127–35. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4899-3605-9_7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Akaike, Kouki, and Kaname Kanai. "Solar Cell Applications of π-Conjugated Molecules." In Physics and Chemistry of Carbon-Based Materials, 293–332. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3417-7_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Sixl, H. "Electronic Structures of Conjugated Polydiacetylene Oligomer Molecules." In Springer Series in Solid-State Sciences, 240–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-82569-9_43.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Lesk, Arthur M. "Molecular Orbital Theory of Planar Conjugated Molecules." In Introduction to Symmetry and Group Theory for Chemists, 103–17. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-2151-8_11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Hannah, Robert W., and Foil A. Miller. "Characteristic Frequencies of Molecules with Triple Bonds and Cumulated Double Bonds." In Course Notes on the Interpretation of Infrared and Raman Spectra, 85–99. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2004. http://dx.doi.org/10.1002/0471690082.ch4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Morley, J. O. "Design of Novel Conjugated Molecules with Large Hyperpolarizabilities." In Springer Proceedings in Physics, 86–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-93426-1_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zhang, Fuji, and Huaien Li. "On maximal energy ordering of acyclic conjugated molecules." In Discrete Mathematical Chemistry, 385–92. Providence, Rhode Island: American Mathematical Society, 2000. http://dx.doi.org/10.1090/dimacs/051/29.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Collard, David M. "π-Stacked Oligomers as Models for Semiconducting Conjugated Organic Materials." In π-Stacked Polymers and Molecules, 185–243. Tokyo: Springer Japan, 2013. http://dx.doi.org/10.1007/978-4-431-54129-5_4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Conjugated and cumulated molecules"

1

LERICHE, P., A. LELIÈGE, E. RIPAUD, V. JEUX, D. DEMETER, P. BLANCHARD, and J. RONCALI. "PHOTOVOLTAICS BASED ON SMALL CONJUGATED MOLECULES." In Proceedings of International Conference Nanomeeting – 2013. WORLD SCIENTIFIC, 2013. http://dx.doi.org/10.1142/9789814460187_0115.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Kotkov, Sergei Y., Victor N. Zadkov, Boris A. Grishanin, Valentin D. Vachev, and John H. Frederick. "Ultrafast dynamics of surface-adsorbed conjugated molecules." In SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, edited by Janice M. Hicks, Wilson Ho, and Hai-Lung Dai. SPIE, 1995. http://dx.doi.org/10.1117/12.221484.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Kubo, Takashi, Mitsuya Aoba, Akihiro Shimizu, Yasukazu Hirao, Kozo Matsumoto, Hiroyuki Kurata, and Masayoshi Nakano. "Singlet open-shell character of conjugated Kekulé molecules." In INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2009: (ICCMSE 2009). AIP, 2012. http://dx.doi.org/10.1063/1.4771836.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Vleugels, Rick, Ward Brullot, and Thierry Verbiest. "Giant faraday rotation in conjugated, rod-like molecules." In SPIE Organic Photonics + Electronics, edited by Joy E. Haley, Jon A. Schuller, Manfred Eich, and Jean-Michel Nunzi. SPIE, 2016. http://dx.doi.org/10.1117/12.2235685.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

SPANO, F. C., and S. SIDDIQUI. "EXCITONS IN PINWHEEL AGGREGATES OF π-CONJUGATED MOLECULES." In Proceedings of the 10th Annual Symposium of the NSF Center. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793294_0006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Aktas, Bengu, Lokman Uzun, Deniz Hur, and Bora Garipcan. "Amino acid conjugated self assembly molecules modified Si wafers." In 2014 18th National Biomedical Engineering Meeting (BIYOMUT). IEEE, 2014. http://dx.doi.org/10.1109/biyomut.2014.7026352.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Wang, Hong X., Akira Takahashi, M. Hartmann, and Shaul Mukamel. "Quantum confinement and nonlinear optical response of conjugated molecules." In OE/LASE'93: Optics, Electro-Optics, & Laser Applications in Science& Engineering, edited by Shahab Etemad. SPIE, 1993. http://dx.doi.org/10.1117/12.148452.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Frederick, John H., Valentin D. Vachev, and J. E. Hadder. "Simple models for excited-state dynamics of conjugated molecules." In Laser Applications in Life Sciences: 5th International Conference, edited by Pavel A. Apanasevich, Nikolai I. Koroteev, Sergei G. Kruglik, and Victor N. Zadkov. SPIE, 1995. http://dx.doi.org/10.1117/12.197471.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Vivas, M. G., L. De Boni, and C. R. Mendonca. "Polarization-dependent two-photon absorption of π-conjugated molecules." In Frontiers in Optics. Washington, D.C.: OSA, 2010. http://dx.doi.org/10.1364/fio.2010.jwa10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Bronstein, Hugo. "Open-shell conjugated small molecules and polymers for optoelectronics." In MATSUS Fall 2023 Conference. València: FUNDACIO DE LA COMUNITAT VALENCIANA SCITO, 2023. http://dx.doi.org/10.29363/nanoge.matsus.2023.321.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Conjugated and cumulated molecules"

1

Spiegel, Yitzhak, Michael McClure, Itzhak Kahane, and B. M. Zuckerman. Characterization of the Phytophagous Nematode Surface Coat to Provide New Strategies for Biocontrol. United States Department of Agriculture, November 1995. http://dx.doi.org/10.32747/1995.7613015.bard.

Full text

Abstract:

Chemical composition and biological role of the surface coat (SC) of the root-knot nematodes, Meloidogyne spp. are described. SC proteins of M. incognita race 3 infective juveniles (J2) were characterized by electrophoresis and western blotting of extracts from radioiodine and biotin-labelled nematodes. J2 labelled with radioiodine and biotin released 125I and biotin-labelled molecules into water after 20 hours incubation, indicating that SC proteins may be loosely attached to the nematode. Antiserum to the principal protein reacted with the surface of live J2 and with surface proteins previously separated by electrophoresis. Human red blood cells (HRBC) adhered to J2 of several tylenchid nematodes over the entire nematode body. HRBC adhered also to nylon fibers coated with SC extracted from M. javanica J2; binding was Ca++/Mg++ dependent, and decreased when the nylon fibers were coated with bovine serum albumin, or pre-incubated with fucose and mannose. These experiments support a working hypothesis that RBC adhesion involves carbohydrate moieties of HRBC and carbohydrate-recognition domain(s) (CRD) distributed on the nematode surface. To our knowledge, this is the first report of a surface CRD i the phylum Nematoda. Gold-conjugated lectins and neoglycoproteins combined with silver enhancement have been used for the detection of carbohydrates and CRD, respectively, on the SC of M. javanica J2. Biotin reagents were used to trace surface proteins, specifically, on live J2. The labile and transitory nature of the SC was demonstrated by the dynamics of HRBC adherence to detergent-treated J2, J2 at different ages or fresh-hatched J2 held at various temperatures. SC recovery was demonstrated also by a SDS-PAGE profile. Monoclonal antibodies developed to a cuticular protein of M. incognita J2 gave a slight, but significant reduction in attachment of Pasteuria penetrans spores. Spore attachment as affected by several enzymes was inconsistent: alcian blue, which specifically blocks sulfyl groups, had no afffect on spore attachment. Treatment with cationized ferritin alone or catonized ferritin following monoclonal antibody caused significant decreases in spore attachment. Those results suggest a role in attachment by negatively charged groups.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!