Tailoring C-6-Substituted Coumarin Scaffolds for Novel Photophysical Properties and Stimuli-Responsive Chromism
作者:Ravinder Singh、Deng-Gao Chen、Chun-Hsiang Wang、Yi-Cheng Lan、Yi-Hung Liu、Pi-Tai Chou、Chao-Tsen Chen
DOI:10.1021/acs.jpcb.1c08133
日期:2021.10.21
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
一种明智的策略被用来设想取代基对基于 2 H -chromen-2-one-3-苯并噻唑支架的推拉框架的光物理性质的显着区域位置影响,命名为6-X-CUMs。其中,6-NEt 2 -CUM显示出显着的激发态分子内电荷转移,偶极矩变化很大(Δμ ∼ 18.23 D),因此从绿色(环己烷中为 536 nm)到远红色区域显示出显着的发射溶剂致变色(在二甲基亚砜中为 714 nm)和高温灵敏度(-0.23 nm °C –1)。这些,连同 NMR 和光谱研究阐明的酸化时独特的碱性和酸/蒸汽变色,与传统的7-NEt 2 -CUM形成鲜明对比。这些定制的6-X-CUM的新系列代表了定制光物理特性以开发一类有前途的多刺激响应材料的新维度。