Structures and Optical Properties of Tris(trimethylsilyl)silylated Oligothiophene Derivatives
作者:Hikaru Inubushi、Yohei Hattori、Yoshinori Yamanoi、Hiroshi Nishihara
DOI:10.1021/jo500029f
日期:2014.4.4
structures and optical properties of tris(trimethylsilyl)silylated oligothiophenes were examined by spectroscopies, theoretical calculations, and single-crystal X-ray measurements. Bathochromic shift from the original oligothiophenes was observed in the tris(trimethylsilyl)silylated ones, confirming the σ–π conjugation between Si–Si σ bonds and π-orbital. 5,5′-Bis(tris(trimethylsilyl)silyl)-2,2′-bithiophene
三(三甲基甲硅烷基)甲硅烷基化的低聚噻吩的结构和光学性质通过光谱学,理论计算和单晶X射线测量进行了检查。在三(三甲基甲硅烷基)甲硅烷基化的寡聚噻吩中发现了从原始的低聚噻吩的红移,这证实了Si-Siσ键与π轨道之间的σ-π共轭。5,5'-双(三(三甲基硅烷基)甲硅烷基)-2,2'-联噻吩(硅-T 2)显示出最高的荧光量子产率(Φ ˚F)无论是在溶液中(0.67,在350nm处激发)和实状态(0.74,在371 nm激发)。引入导致的小的非辐射率恒定三(三甲硅烷基)甲硅烷基的Si-T 2,从而导致在高Φ ˚F在解决方案状态。的Si-T 2也显示出有效的σ-π共轭和差分子相互作用,这反映其高Φ ˚F在固体状态。相反,降低Φ ˚F(0.13,在331纳米激发的)在固体状态中最长的低聚噻吩检查,5,5''' -双(1,1,1,3,3,3-六甲基-2-观察(三甲基硅烷基)三硅烷基-2-基)-2,2′: