Photochemical and Photophysical Reactions of <i>f</i><i>ac</i>-Rhenium(I) Tricarbonyl Complexes. Effects from Binucleating Spectator Ligands on Excited and Ground State Processes
作者:J. Guerrero、O. E. Piro、E. Wolcan、M. R. Feliz、G. Ferraudi、S. A. Moya
DOI:10.1021/om000784p
日期:2001.6.1
the newly prepared complexes Re(CO)3(2,2‘-biquinoline)LS+, LS = pyrazine or 4,4‘-bipyridine, and Re(CO)3(2,2‘-bipy)(2-pyrazinecarboxylate) were investigated by steady state and time-resolved spectroscopy. The X-ray structure of the latter compound showed that the spectator ligand 2-pyrazinecarboxylate is coordinated through the carboxylate group to Re(I). A component of the complexes' luminescence was
地面和新制备的复合物的Re(CO)的激发态性质3(2,2'-联喹啉)L-小号+,L小号=吡嗪或4,4'-联吡啶和Re(CO)3(2,2' -bipy)(2-吡嗪羧酸酯)的稳态和时间分辨光谱法进行了研究。后一种化合物的X射线结构表明,观众配体2-吡嗪羧酸酯通过羧酸酯基团配位到Re(I)。配合物发光的一个成分与长寿命的配体Re,2,2'-联喹啉或2,2'-联吡啶的电荷转移有关,而发射的一个快速成分与配体内激发态有关。CuCl 2对发光的猝灭通过动态和静态机制进行能量传递。处于激发态的复合物被2,2',2''-三氟三乙醇还原,并形成Re(I)配位基自由基物种。通过复合物的脉冲辐射分解产生类似的产物。比较了2,2'-联喹啉配合物和Re(CO)3(1,10-phen)4-硝基苯甲酸酯的光化学性质,并探讨了其光化学反应的机理。