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Photochemistry of Dithiocarbamate Cu(S2CNEt2)2 Complex in CHCl3. Transient Species and TD-DFT Calculations
The Journal of Physical Chemistry A ( IF 2.7 ) Pub Date : 2016-09-30 00:00:00 , DOI: 10.1021/acs.jpca.6b08738
Aleksey I. Solovyev 1, 2 , Victor F. Plyusnin 1, 2 , Aleksandr A. Shubin 2, 3 , Vjacheslav P. Grivin 1 , Stanislav V. Larionov 2, 4
Affiliation  

Nanosecond laser flash photolysis was used to study the mechanism of photochemical transformations of the diethyldithiocarbamate Cu(II) complex (Cu(dtc)2, where dtcS2CNEt2 anion) in chloroform solutions. The electron transfer from the excited Cu(dtc)2 complex to a solvent molecule leads to the appearance of the primary intermediate, the [ClCu(dtc)(dtcCHCl2)] complex, where a dtcCHCl2 molecule is coordinated with a copper ion via one sulfur atom. In the fast reaction (k = 2.1 × 109 M–1 s–1) with Cu(dtc)2, this complex forms a long-lived dimer [ClCu(dtc)(dtcCHCl2)Cu(dtc)2]. This intermediate decays during several seconds (k = 5.6 × 10–2 s–1) into the final product, i.e., a diamagnetic dimer [ClCu(dtc)Cu(dtc)2]. To determine the structure of intermediate complexes the quantum chemical calculations were carried out using DFT, TD-DFT, and PCM (Polarizable Continuum Model) methods.

中文翻译:

二硫代氨基甲酸盐Cu(S 2 CNEt 22络合物在CHCl 3中的光化学。暂态物种和TD-DFT计算

纳秒激光闪光光解被用于研究二乙基二铜(II)配合物(铜(DTC)的光化学转化的机构2,其中DTC --小号2 CNET 2阴离子)的氯仿溶液。电子从激发的Cu(dtc)2络合物转移到溶剂分子导致出现第一中间体[ClCu(dtc)(dtcCHCl 2)]络合物,其中dtcCHCl 2分子与铜离子通过一个硫原子 在与Cu(dtc)2的快速反应中(k = 2.1×10 9 M –1 s –1,该络合物形成长寿命的二聚体[ClCu(dtc)(dtcCHCl 2)Cu(dtc)2 ]。该中间体会在几秒钟内(k = 5.6×10 –2 s –1)衰减成最终产物,即反磁性二聚体[ClCu(dtc)Cu(dtc)2 ]。为了确定中间体配合物的结构,使用DFT,TD-DFT和PCM(可极化连续体模型)方法进行了量子化学计算。
更新日期:2016-09-30
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