Competitive Radiative Decay and Metal-Metal Bond Cleavage from the Lowest Excited State of Triphenyltin- and Triphenylgermanium-tricarbonyl (1,10-phenanthroline)rhenium.
Competitive Radiative Decay and Metal-Metal Bond Cleavage from the Lowest Excited State of Triphenyltin- and Triphenylgermanium-tricarbonyl (1,10-phenanthroline)rhenium.
复制标题
三苯基锡和三苯基锗-三羰基（1,10-菲咯啉）铼最低激发态的竞争性辐射衰变和金属-金属键断裂。
DOI：
10.1021/ja00500a041
复制
发表时间：
1979
期刊：
影响因子：
--
通讯作者：
M. Wrighton
中科院分区：
文献类型：
--
作者：
J. Luong;R. A. Faltynek;M. Wrighton
摘要/ Abstract摘要：配合物Ph3ERe(CO)3（，10-菲罗啉）（E = Sn, Ge）的光发射率约为。750nm)，从最低激发态在CH2Cl2/CCl4溶液在298度。K，也给出了E-Re键的解理（约φ）。0.25)，在相同条件下光激发。ClRe(CO)3（1,10 -邻菲罗啉）生成的相对发射量子产率和反应量子产率与激发波长无关，激发波长符合最低激发态的反应和发射。在苯溶液中被CCl4猝灭，排除了激发态、双分子、电子向CCl4转移等反应机理。相反，这种机制可能是缓慢的（大约）。1/100000秒)E-Re离解。这个概念与最低激发态是一致的。
Abstract : The complexes Ph3ERe(CO)3( ,10-phenanthroline) (E = Sn, Ge) exhibit optical emission (approx. 750 nm) from the lowest excited state in CH2Cl2/CCl4 solutions at 298deg. K and also give E-Re bond cleavage (Phi approx. 0.25) upon photoexcitation under the same conditions. Both the relative emission quantum yield and the reaction quantum yield for ClRe(CO)3 (l,10-phenanthroline) formation are independent of excitation wavelength consistent with reaction and emission originating from the lowest excited state. The emission is now quenched by CCl4 in benzene solution, ruling out excited state, bimolecular, electron transfer to CCl4 as the reaction mechanism. Rather, the mechanism is likely slow (approx. 1/100000 sec) E-Re dissociation. This notion is in accord with a lowest excited state.