Fluorescence Enhancement of Covalently Linked 1-Cyano-1,2-diphenylethene Chromophores with Naphthalene-1,8-diyl Linker Units: Analysis Based on Kinetic Constants
作者:Takashi Hirose、Yohei Tsunoi、Yuya Fujimori、Kenji Matsuda
DOI:10.1002/chem.201404745
日期:2015.1.19
of kinetic analysis of decay rate constants and theoretical calculations. Derivatives of 1‐cyano‐1,2‐diphenylethene dimer have a distorted cyclic structure when both ends are clipped with two naphthalene‐1,8‐diyl linker units. In contrast to the reference monomer derivative, which exhibits only slight fluorescence in solution (Φf<0.01, τf<0.1 ns), the dimer derivative shows high fluorescence quantum
已经通过衰减速率常数的动力学分析和理论计算研究了共价固定的荧光发色团的荧光增强作用。当1-氰基1,2-二苯基乙烯二聚体的两个末端被两个萘-1,8-二基连接基单元夹住时,它们的环状结构会扭曲。与此相反的参考单体衍生物,其表现出在溶液中只有轻微的荧光(Φ ˚F <0.01,τ ˚F <0.1纳秒),二聚体衍生物显示出高的荧光量子产率(Φ ˚F = 0.55)和长寿命(τ ˚F = 20.6由于抑制了非辐射衰减过程(k nr = 0.022 ns-1)。AV-形,在一侧上的共价接头衍生物显示中等量子产率和寿命(Φ ˚F = 0.12,τ ˚F = 4.9纳秒)。根据吸收/荧光带的波长位移以及基于时变密度泛函理论(TD-DFT)的理论计算,我们提出了一种H-聚集体型准分子相互作用。