Photoactive amorphous molecular materials based on bisquinoline diamines and their synthesis by Friedländer condensation reaction

Autor:	Pradip K. Bhowmik, L. Senthilkumar, Tae Soo Jo, P. Umadevi, Haesook Han, Jung Jae Koh, Alexi K. Nedeltchev
Rok vydání:	2014
Předmět:	Absorption spectroscopy Polymerization Chemistry General Chemical Engineering General Physics and Astronomy Molecular orbital Density functional theory General Chemistry Time-dependent density functional theory Glass transition Condensation reaction Photochemistry Amorphous solid
Zdroj:	Journal of Photochemistry and Photobiology A: Chemistry. 283:45-55
ISSN:	1010-6030
Popis:	A new class of bisquinoline diamines prepared by Friedlander condensation reaction are reported showing stable amorphous state with high glass transition temperatures up to 150 °C and high thermal stabilities >370 °C. Additionally, they show excellent fluorescent properties in the blue, green and yellow region of visible light in both solution and solid states. They show narrow full-widths at half-maxima in the range of 52–73 nm in various organic solvents. Their solution quantum efficiencies are relatively high in the range of 27–38%. The absorption spectra obtained from time-dependent density functional theory (TDDFT) using optimized geometry correlated well with the experimental data. From the frontier molecular orbital studies, the electronic transitions involved possesses π–π* character. These materials could be useful for high-performance applications in opto- and microelectronic fields either by further chemical transformations of these diamines for amorphous molecular materials or by their polymerization reactions to create charge transporting materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cbc1768af2c632682e3f2c1b5fdaee66 https://doi.org/10.1016/j.jphotochem.2014.03.021 Zobrazit plný text záznamu Full Text from ScienceDirect