Synthesis, Photophysical and Electrochemical Investigation of Dinuclear Tetrazolato-Bridged Rhenium Complexes
作者:Phillip J. Wright、Sara Muzzioli、Melissa V. Werrett、Paolo Raiteri、Brian W. Skelton、Debbie S. Silvester、Stefano Stagni、Massimiliano Massi
DOI:10.1021/om300870a
日期:2012.11.12
Dinuclear complexes were obtained by treatment of the corresponding mononuclear tetrazole-bound complexes with fac-[Re(CO)3(phen)(THF)]+. The second rhenium fragment coordinated either to the pyridine ring or, in the case of the benzonitrile ligand, to the tetrazole ring. The electrochemical properties were probed in an imidazolium ionic liquid, highlighting reduction processes centered on the phen
从基于阴离子四唑的配体开始,即5-(4'-氰基苯基)四唑酸酯和5-(4'-吡啶基)四唑酸酯,fac- [Re(CO)3(phen)] +(phen的单核和双核配合物制备并表征1,10-菲咯啉。对于单核络合物,仅获得带负电荷的四唑并环上金属片段的区域选择性配位。通过先前的四唑环烷基化,实现与苄腈和吡啶基的配位。通过用fac- [Re(CO)3(phen)(THF)] +处理相应的单核四唑结合的配合物获得双核配合物。第二个fragment片段与吡啶环配位,或者在苄腈配体的情况下与四唑环配位。在咪唑鎓离子液体中探查了电化学性质,突出了以phen配体为中心的还原过程和位于金属上的氧化过程。配合物的光物理性质的特征在于三重态金属到配体的电荷转移激发态的磷光发射,其寿命和量子产率的趋势与能隙定律一致。这两种双核络合物显示出几乎可叠加的发射曲线:在5-(4'-氰基苯基)四唑酸盐桥连的络合物中,与四唑配位