Viscosity sensitive semisquaraines based on 1, 1, 2-trimethyl-1H-benzo[e]indole: Photophysical properties, intramolecular charge transfer, solvatochromism, electrochemical and DFT study
作者:Sushil Khopkar、Mahesh Jachak、Ganapati Shankarling
DOI:10.1016/j.molliq.2019.03.173
日期:2019.7
1, 1, 2-Trimethyl-1H-benzo[e]indole based D-π-A type semisquaraines denoted as, SSK 1–3 were synthesized to investigate their primary photophysical properties, intramolecular charge transfer, solvatochromism, electrochemical properties and viscosity dependent enhanced emission. These semisquaraines contain 1, 1, 2-trimethyl-1H-benzo[e]indole and squaryl ring as donor and acceptor respectively. These
1,1,2-三甲基-1H-苯并[ ë ]吲哚基于d-π-A型半方酸菁表示为,SSK 1 - 3合成来调查它们的主要光物理性质,分子内电荷转移,溶剂化,电化学性能和粘度依赖排放增加。这些半方胺分别包含1、1、2-三甲基-1H-苯并[ e ]吲哚和方酸环作为供体和受体。这些染料在437至444 nm之间显示吸收,并且在469–493 nm范围内发射。合成化合物的斯托克斯位移在32–54 nm范围内。的SSK 1 - 3显示出强烈的黄-橙色固态荧光(F最大 = 520–549 nm)。这些染料表现出分子内电荷转移特性,这由其振荡器强度,跃迁偶极矩,基态和激发态偶极矩以及广义Mulliken-Hash分析(GMH)证实。此外,正发射溶剂化变色行为(Δλ EM = 21-24纳米)这些染料从不同的溶剂极性曲线进行定量分析。更有趣的是,这些D-π-A型FMR在可见光谱(450-650 nm)处的99