complexation. The CO stretching frequencies are in accord with facial geometry of the rhenium complex. The photochemical behavior of free trans-1,2-bis(4-pyridyl)ethylene and of its protonated form is also reported. The quantum yield for the trans→cis photoinduced isomerization of free ligand in methanolic solutions at 313 nm irradiation is 0.17±0.03. The average values for the photoisomerization of the protonated
合成了复合物
FAc- [Re(CO)3(phen)(t -bpe)] PF 6(t -bpe =反式-1,2-双(4-
吡啶基)
乙烯,phen = 1,10-
菲咯啉) ,经紫外-可见,1 H NMR,拉曼和红外光谱纯化和表征。
FAc- [Re(CO)3(phen)(t -bpe)] +的1 H NMR共振光谱揭示了在配位t上
金属中心的清晰电子通讯-bpe在络合时
配体信号发生高场移位。CO拉伸频率与stretching配合物的面部几何形状一致。还报道了游离反式-1,2-双(4-
吡啶基)
乙烯及其质子化形式的光
化学行为。在313 nm照射下,
甲醇溶液中游离
配体的反式→顺式光致异构化的量子产率为0.17±0.03。质子化
配体(pH 1.9)的光异构化的平均值在313和334 nm激发下分别为0.19±0.02和0.15±0.01。所述光辅助反式→顺异构吨在-bpe
FAC - [的Re(CO)3(p