Tailoring C-6-Substituted Coumarin Scaffolds for Novel Photophysical Properties and Stimuli-Responsive Chromism

Autor:	Deng-Gao Chen, Chao-Tsen Chen, Pi-Tai Chou, Yi-Cheng Lan, Ravinder Singh, Chun-Hsiang Wang, Yi-Hung Liu
Rok vydání:	2021
Předmět:	Materials science Stimuli responsive Cyclohexane Solvatochromism Photochemistry Coumarin Surfaces Coatings and Films Dipole chemistry.chemical_compound Chromism chemistry Coumarins Intramolecular force Solvents Materials Chemistry Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry B. 125:11557-11565
ISSN:	1520-5207 1520-6106
Popis:	A judicious strategy was utilized to envision the substantial regio-positional effects of substituents on the photophysical properties of the 2H-chromen-2-one-3-benzothiazole scaffold-based push-pull framework, named 6-X-CUMs. Among them, 6-NEt2-CUM reveals prominent excited-state intramolecular charge transfer with a large change of dipole moment (Δμ ∼ 18.23 D), hence displaying remarkable emission solvatochromism from the green (536 nm in cyclohexane) to far-red region (714 nm in dimethyl sulfoxide) and a high-temperature sensitivity (-0.23 nm °C-1). These, together with unique basicity and acido-/vaporchromism upon acidification elucidated by NMR and photospectroscopic studies, show stark contrast to the conventional 7-NEt2-CUM. The new series of these tailored 6-X-CUMs represents a new dimension in tailoring the photophysical properties for the development of a promising class of multistimuli-responsive materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b263a46bfebf1aecc2f57bf50d4a7b57 https://doi.org/10.1021/acs.jpcb.1c08133 Zobrazit plný text záznamu