Photophysics and Redox Properties of Rylene Imide and Diimide Dyes Alkylated Ortho to the Imide Groups
作者:Joseph E. Bullock、Michael T. Vagnini、Charusheela Ramanan、Dick T. Co、Thea M. Wilson、Jay W. Dicke、Tobin J. Marks、Michael R. Wasielewski
DOI:10.1021/jp908679c
日期:2010.2.11
naphthalene-1,4:5,8-bis(dicarboximide) (NI), perylene-3,4-dicarboximide (PMI), perylene-3,4:9,10-bis(dicarboximide) (PDI), and terrylene-3,4:11,12-bis(dicarboximide) (TDI). The monoimides were dialkylated, while the diimides were tetraalkylated, with the exception of NI, which could only be dialkylated due to steric hindrance. The absorption, fluorescence, transient absorption spectra, and lowest excited
钌催化的CH键活化可直接将源自苯乙烯的苯乙基直接连接到各种萘嵌苯二酰亚胺和二酰亚胺中的邻苯二甲酰亚胺位置,包括萘1,8-双二甲酰亚胺(NMI),萘1,4 :5,8-双(二甲酰亚胺)(NI)、,-3,4-二甲酰亚胺(PMI),per-3,4:9,10-双(二甲酰亚胺)(PDI)和三甲苯-3,4:11 ,12-双(二甲叉酰亚胺)(TDI)。除NI外,单酰亚胺是二烷基化的,而二酰亚胺是四烷基化的,NI由于空间位阻而只能被二烷基化。这些发色团的吸收,荧光,瞬态吸收光谱和最低激发单重态寿命(除NI外)与未取代的母发色团几乎相同。二烷基化生色团的还原电势比母体化合物高约100 mV负电势,氧化电势比母体化合物的正电势低约40 mV正电,而四烷基化化合物的相应电势比负电基体强约200 mV,正电势低约100 mV。它们的母体化合物的那些。PDI自由基阴离子的连续波电子顺磁共振(EPR)和电子核双共振