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Relevant bibliographies by topics / Electron-donating groups

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Academic literature on the topic 'Electron-donating groups'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Electron-donating groups"

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Xu, Jian, Bin Niu, Song Guo, et al. "Influence of Chromophoric Electron-Donating Groups on Photoinduced Solid-to-Liquid Transitions of Azopolymers." Polymers 12, no. 4 (2020): 901. http://dx.doi.org/10.3390/polym12040901.

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The photoinduced solid-to-liquid transitions property of azobenzene-containing polymers (azopolymers) enables azopolymers with various promising applications. However, a general lack of knowledge regarding the influence of structure of the azobenzene derivatives on the photoinduced liquefaction hinders the design of novel azopolymers. In the present study, a series of azopolymers with side chains containing azobenzene unit bearing alkyl electron-donating groups were synthesized. The photoisomerization and photoinduced liquefaction properties of newly synthesized azopolymers were investigated.

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Ohwada, Tomohiko, and Koichi Shudo. "Ethylene dications substituted with electron-donating groups." Journal of Organic Chemistry 54, no. 22 (1989): 5227–37. http://dx.doi.org/10.1021/jo00283a012.

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Barbarella, Giovanna, Massimo Zambianchi, Rossanna Di Toro, Martino Colonna, Luciano Antolini, and Alessandro Bongini. "Functionalization of sexithiophene with electron-donating methylsulphanyl groups." Advanced Materials 8, no. 4 (1996): 327–31. http://dx.doi.org/10.1002/adma.19960080408.

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Du, Yang, Hui Zhang, Xia Du, et al. "A Theoretical Study on the Influence of the Functional Group Electronic Effect on the Electron Mobility of Cross-Linked Polyethylene." Applied Sciences 15, no. 2 (2025): 959. https://doi.org/10.3390/app15020959.

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The effect of electron-donating and electron-withdrawing groups grafted onto polyethylene on electron mobility was studied using density functional theory. In order to ensure the accuracy of the calculation results, 17 basis sets from six methods were screened. 3-methylpentane was selected as the cross-linked polyethylene model. Compared with the experimental values, the theoretical calculation results show that wB97XD/6-311G(d,p) is more suitable for studying the electron mobility system. The roles of electron-donating and electron-withdrawing functional groups were studied. The results show

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Bekki, Yosuke, and Atsuhiro Osuka. "meso‐ Free B III Subporphyrins with Electron‐donating Groups." Chemistry – An Asian Journal 15, no. 10 (2020): 1580–89. http://dx.doi.org/10.1002/asia.202000288.

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Gudimetla, Vittal B., Liqing Ma, Marlena P. Washington, John L. Payton, M. Cather Simpson, and John D. Protasiewicz. "meta-Terphenyl Phosphaalkenes Bearing Electron-Donating and -Accepting Groups." European Journal of Inorganic Chemistry 2010, no. 6 (2010): 854–65. http://dx.doi.org/10.1002/ejic.200900870.

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Cao, Wei, Kang Wang, Isabelle Ledoux-Rak, and Jianzhuang Jiang. "ABAB-type phthalocyanines simultaneously bearing electron donating and electron accepting groups. Synthesis, spectroscopy, and structure." Inorganic Chemistry Frontiers 3, no. 9 (2016): 1146–51. http://dx.doi.org/10.1039/c6qi00147e.

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Mg(trans-TPTCPc) was successfully prepared and structurally characterized, representing the first structurally characterized ABAB-type phthalocyanine compound simultaneously bearing electron-donating and electron-accepting groups.

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Durand, Raphaël J., Sébastien Gauthier, Sylvain Achelle, et al. "Incorporation of a platinum center in the pi-conjugated core of push–pull chromophores for nonlinear optics (NLO)." Dalton Transactions 46, no. 9 (2017): 3059–69. http://dx.doi.org/10.1039/c7dt00252a.

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Bahrami, Mozhgan, Xingwen Zhang, Morteza Ehsani, Yousef Jahani, and Richard M. Laine. "[PhSiO1.5]8,10,12as nanoreactors for non-enzymatic introduction of ortho, meta or para-hydroxyl groups to aromatic molecules." Dalton Transactions 46, no. 27 (2017): 8797–808. http://dx.doi.org/10.1039/c7dt00373k.

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Traditional electrophilic bromination follows long established “rules”: electron-withdrawing substituents cause bromination selective formetapositions, whereas electron-donating substituents favororthoandparabromination.

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Baek, Jong-Beom, and Frank W. Harris. "Synthesis of phenylquinoxaline oligomers containing pendant electron-donating and electron-withdrawing groups." Journal of Polymer Science Part A: Polymer Chemistry 43, no. 24 (2005): 6465–79. http://dx.doi.org/10.1002/pola.21119.

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Dissertations / Theses on the topic "Electron-donating groups"

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Sutradhar, Tanushree. "Theoretical investigation on optoelectronic properties of nanoclusters and conjugates." Thesis, University of North Bengal, 2021. http://ir.nbu.ac.in/handle/123456789/4750.

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Cheng, Hong-Yi, and 陳鴻儀. "The synthesis of porphyrins with electron-withdrawing and -donating groups." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/64541561928294591379.

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碩士<br>國立中興大學<br>化學系所<br>96<br>Abstract A series of zinc porphyrins with both electron donor and acceptor groups were synthesized for use as NLO chromophores in optoelectronic materials and devices.The porphyrin bridge connecting D and A groups should provide a pathway for strong electronic coupling between D and A. Organic molecules with strong electron donor and electron aceptor groups that are connected by a large conjugated π– electron system usually show high β values, so we utilized a ethynyl unit to extendπ– conjugation of the systems. The preparation of porphyrins with ethyne-link

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CHANG, HSIEH MING, and 謝明璋. "Mechanistic Studies on The Thermal [m+n] Cycloadditions of Electron-Withdrawing Group Heptafulvenes and Electron-Donating Group Fulvenes." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/66903829394433213991.

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碩士<br>中國文化大學<br>應用化學研究所<br>88<br>In order to determine the product selectivity，such as the diastereoselectivity，periselectivity，and regioselectivity，which is governed by steric effects and electronic effects of the exocyclic substituents on the fulvenes and heptafulvenes，the intermolcular cycloadditions of electron-rich disubstituted 2- (2，4-cyclopentien-1-ylidene)-1，3-dithiolanefulvene (3c)，with 8，8-dicyanoheptafulvene (9a) are investigated. The reaction of strong electron-deficient substituted heptafulvene 9a (LUMO) with the fulvene 3c (HOMO) afford [4+2] adducts 20a (s

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Book chapters on the topic "Electron-donating groups"

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Bachrach, Steven M. "More Hard Truths." In Thinking Like a Physical Organic Chemist. Oxford University Press, 2023. http://dx.doi.org/10.1093/oso/9780197640371.003.0013.

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Abstract Organic chemistry textbooks commonly discuss alkyl groups (groups composed of carbon and hydrogen atoms) as electron donating. This chapter presents the standard experiments that support that notion and delves into the gas-phase acidity experiments that upend this standard explanation.

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Hore, P. J. "Chemical shifts." In Nuclear Magnetic Resonance. Oxford University Press, 2015. http://dx.doi.org/10.1093/hesc/9780198703419.003.0002.

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This chapter discusses chemical shifts. These give information on molecular identity and structure. The nuclear magnetic resonance (NMR) frequency of a nucleus in a molecule is determined principally by its magnetogyric ratio and the strength of the magnetic field it experiences. Chemical shifts arise because the field actually experienced by a nucleus in an atom or molecule differs slightly from the external field produced by the magnet. A magnetic field can induce two kinds of electronic current in a molecule: diamagnetic and paramagnetic. Diamagnetic and paramagnetic currents flow in opposi

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Vinduja, Puttanveedu, and Karuvanthodi Muraleedharan. "Theoretical Studies on Anti-Oxidant Activity of the Phytochemical, Coumestrol and Its Derivatives." In Functional Foods - Phytochemicals and Health Promoting Potential. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96967.

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Free radical-induced changes in cellular and organ levels have been studied as a possible underlying cause of various adverse health conditions. Important research efforts have, therefore, been made to discover more powerful and potent antioxidants/free radical scavengers for the treatment of these adverse conditions. The phytoestrogen coumestrol intensively attracted scientific interest due to their efficient pharmacological activities. In this scenario, DFT studies were carried out to test the antiradical activities of coumestrol and its derivatives. The results obtained from FEDAM plots dem

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Agrawal, Pratibha S., M. K. N. Yenkie, M. G. Bhotmange, B. D. Deshpande, and S. J. Dhoble. "Degradation of Substituted Benzoic Acids Related to Structural Reactivity." In Water Pollution Sources and Purification: Challenges and Scope. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815050684122010006.

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The existence of organic acids in aqueous waste continues to be an important environmental concern because of the odor and toxicity they impart to water. The photochemical degradation of benzoic acids (BA) and some of the substituted benzoic acids (SBA), which act as environmental pollutants, are studied in the present investigation using the Advanced Oxidation Processes (AOPs) and combinations of different oxidants and UV irradiation (UV/H2O2 , UV/TiO2 , UV/ZnO, and Fe(III)- oxalate complex). The photo-oxidative degradation of these pollutants was followed by studying their concentration deca

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Keeler, James, and Peter Wothers. "Transition metals." In Chemical Structure and Reactivity. Oxford University Press, 2013. http://dx.doi.org/10.1093/hesc/9780199604135.003.0019.

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This chapter assesses the d-block elements, which form Groups 3–11 and are collectively often referred to as the transition metals. The common feature of these elements is the presence of a partially filled d sub-shell. It is the presence of this partly filled shell which is responsible for most of the special properties which set the transition metals apart from main-group metals. These special properties include: the existence of compounds in which a particular element shows a range of oxidation states; the presence of unpaired electrons associated with the metal; the formation of coloured c

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Roy, M. N., V. N. G. Lindsay, and A. B. Charette. "Using Metal Carbenes Bearing One Electron-Withdrawing Group and One Electron-Donating Group." In Stereoselective Synthesis 1 Stereoselective Reactions of Carbon—Carbon Double Bonds. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-201-00407.

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Mingos, D. M. P. "Dative bond to dipole moment." In Essentials of Inorganic Chemistry 1. Oxford University Press, 1995. http://dx.doi.org/10.1093/hesc/9780198558484.003.0004.

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This chapter focuses on the dative bond and the dipole moment. A dative or co-ordinate bond is a covalent bond which originates from the donation of an electron-pair from one atom (or group of atoms) to an empty orbital on a second atom. Although the origin of the electron-pair in a co-ordinate bond is usually a lone pair on the donating atom, it can also be an electron-pair residing in a bonding σ- or π-orbital. Molecules act as electric dipoles if the charge distribution in them corresponds to a separation of regions of partial positive and negative charges. This occurs when the vector sum o

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Mellor, Sarah L., and Donald A. Wellings. "Synthesis of modified peptides." In Fmoc Solid Phase Peptide Synthesis. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780199637256.003.0010.

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Several important hormones such as oxytocin, secretin, and LHRH are known to be peptidyl amides. In addition to these, other peptidyl amides such as indolicidin and the protegrins have been shown to exhibit potent antimicrobial activity. The in vivo production of such compounds is via endogenous enzymatic cleavage of propeptides, making their synthesis by genetic engineering notoriously difficult. Furthermore, to facilitate the survival of synthetic peptidyl amides in vivo, an obvious defence against the action of carboxypeptidases is the N-alkylation of the carboxylic amide terminus. Such sec

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Clayden, Jonathan, Nick Greeves, and Stuart Warren. "Synthesis and reactions of carbenes." In Organic Chemistry. Oxford University Press, 2012. http://dx.doi.org/10.1093/hesc/9780199270293.003.0038.

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This chapter reviews the synthesis and reactions of carbenes. The best evidence for the existence of carbenes comes from a group of structures which contain a carbene but are stable compounds. The most important of these are known as the ‘N-heterocyclic carbenes’—the carbene is incorporated into a five-membered ring and stabilized by the presence of two adjacent electron-donating nitrogen atoms and the bulky N-substituents. These stable carbenes are very much the exception: most carbenes are too reactive to be isolated. Ultimately, carbenes can be formed from many other reactive intermediates,

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Nawaz Shariff, Shakeel, Supriya Saravu, and Dileep Ramakrishna. "Schiff Base Complexes for Catalytic Application." In Schiff Base in Organic, Inorganic and Physical Chemistry [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.107904.

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Primary amines are combined with an aldehyde group to generate Schiff base compounds, which are called condensation imine products. This class of compounds has a general structure, R-C=NR\', where R and R\' represent alkyl/aryl/cyclohexyl/heterocyclic group. These compounds contain an azomethine group that is basic in nature due to, (i) the presence of lone pair of electrons on the nitrogen and (ii) electron-donating nature of the double bond. Hence, these compounds, as ligands, participate in the formation of metal complexes. The presence of lone pair of electrons on the nitrogen atom and the

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Conference papers on the topic "Electron-donating groups"

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Knorr, Erica S., Jordan C. Kelly, Daniel P. Harrison, and Thomas N. Rohrabaugh. "Effect of electron-donating and -withdrawing groups on the photophysical properties of iridium (iii) diphenyl quinoxaline complexes." In Organic Photonic Materials and Devices XXVII, edited by Ileana Rau, Okihiro Sugihara, and William M. Shensky. SPIE, 2025. https://doi.org/10.1117/12.3047905.

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Smith, David A. M., Scott Williams, P. Jenkner, Robert D. Miller, E. J. Ginsburg, and Robin M. Hochstrasser. "Localization of excitations in silicon chains by electron donating side groups." In Optics Quebec, edited by Roger A. Lessard. SPIE, 1994. http://dx.doi.org/10.1117/12.166345.

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Liu, Li, Jie-Ping Shi, Hong-Wen Hu, and Guo-Yuan Lu. "Photophysical properties of tribranched chromophores Based on 1,3,5-triazine core and 3,4-ethyllenedioxythiophene electron-donating end-groups." In 2011 IEEE 4th International Nanoelectronics Conference (INEC). IEEE, 2011. http://dx.doi.org/10.1109/inec.2011.5991650.

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Runser, Claude, Marguerite Barzoukas, Alain Fort, Mireille Blanchard-Desce, and Jean-Marie Lehn. "Push-pull polyenes with enhanced quadratic nonlinear susceptibilities." In The European Conference on Lasers and Electro-Optics. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/cleo_europe.1994.cwf42.

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Organic molecules have been extensively studied in view of their potential applications for second-harmonic generation and electrooptic modulation in nonlinear optics.1 Molecules bearing a donor- acceptor (or push-pull) substituted π electron system can yield significant quadratic hyperpolarizabilities β. In addition, early experimental studies on para disubstituted polyenic systems have shown superlinear dependences of β with the length of the conjugation path linking the electron-donating and electron-accepting end groups.2−4 Also semiempirical calculations conducted on two series of push-pu

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MOTOYOSHIYA, J., T. TANAKA, M. KUROE, and Y. NISHII. "CHEMILUMINESCENCE OF 9-BENZYLIDENE-10-METHYLACRIDANS WITH ELECTRON-DONATING GROUPS BY CHEMICALLY GENERATED SINGLET OXYGEN – APPLICATION TO METAL ION SENSING USING AZACROWNED COMPOUND." In Proceedings of the 15th International Symposium. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812839589_0054.

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Chittibabu, K. G., L. Li, X. Wang, J. Kumar, and S. K. Tripathy. "Thiophene based Nonlinear Optical Chromophore functionalized Epoxy Polymers for Electro-Optic Applications." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.thc.4.

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Polymeric materials present certain advantages over inorganic crystals for second-order nonlinear optical (NLO) applications because of their low dielectric constant, large optical nonlinearity, low cost, and ease of processability. Stable NLO polymeric materials are potential candidates for electro-optic (EO) devices such as high bandwidth electro-optic modulators [1], optical interconnects [2], and fiber optic gyros [3]. Second-order NLO properties in polymers are present when the chromophores are aligned in a non-centrosymmetric manner. Chromophores with enhanced NLO susceptibilities can be

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Yoshihara, K., A. Douhal, Y. Nagasawa, A. Yartzev, H. Kandori, and K. Kenmitz. "Femtosecond intermolecular electron transfer : dye in weakly polar electron-donating solvent." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/up.1992.md1.

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Ultrafast intermolecular electron transfer (0.1-0.2 ps) was observed for xantheme dyes in electron-donating solvents. Rates were limited by ultrafast nuclear relaxation not by solvent longitudinal relaxation, (470 mn) and AN (405 nm) and DMA (470 nm) cations in the subpicosecond timescale. From the recovery of ground-state depletion and decay of cation radicals, the reverse ET was also found to be fast, i.e., 4.0 ps in NB/DMA and 2.7 ps in NB/AN.

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Plaza, P., N. Dai Hung, M. M. Martin, Y. H. Meyer, and W. Rettig. "Investigation of Fast Relaxation Processes in Non-fluorescent Rhodamine Dyes." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1992. http://dx.doi.org/10.1364/up.1992.fc21.

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Non radiative relaxation of various N-substituted ethyl-ester-Rhodamine dyes (scheme A) was explained by assuming an intramolecular rotational motion towards a low lying non emissive TICT-like state with charge localization [1]. Stationary and time-resolved fluorescence experiments evidenced that fluorescence quenching in those Rhodamines is linked with the rotation of the amino group. On the other hand, if the o-carboxyphenyl group is exchanged for a p-dimethylamino electron donor group (scheme B), the fluorescence quantum yield is very low in neutral ethanol but increases by more than two or

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Nagasawa, Yutaka, Arkadiy P. Yartsev, Keisuke Tominaga, and Keitaro Yoshihara. "Chemical Substitution and Deuterium Isotope Effects on Ultrafast Intermolecular Electron Transfer: Possible Role of Molecular Vibrations." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 1994. http://dx.doi.org/10.1364/up.1994.fa.3.

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We have observed ultrafast non-exponential fluorescence quenching of 7-aminocoumarin dyes in electron donating solvents by means of femtosecond fluorescence up-conversion technique [1]. We regarded this fluorescence quenching as an ultrafast intermolecular electron transfer (ET) from the solvent to the excited dye. When the carbon chain on the amino group becomes longer, the rate of ET becomes slower, and when the amino group is fixed by hexagonal carbon ring, it becomes the slowest. Some of the fast reactions occur much faster than the diffusive solvent relaxation process. The fastest reactio

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Andrade, Karine N. de, Amanda R. P. Costa, Rodolfo I. Teixeira, et al. "Photophysical characterization of 3-acyl-4-quinolones." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol202006.

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4-quinolones derivatives can present fluorescent properties, depending on their substituents and on the chemical environment (e.g., acidic medium), allowing their application as ion sensors. We theoretically evaluated the photophysical properties of previously synthesized 3-acyl-4-quinolones to verify how different substituents (R1=H, NH2 and R2 = OEt, OH, NHPh) affect their absorption profiles and the emission profile of a reference compound, PB3. All DFT and TD-DFT calculations were performed at B3LYP-D3/6-311++G(d,p) level and continuum polarization model for simulated acetonitrile as solve

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