Synthesis and physical properties of α,ω-bis[Co2(CO)6{μ-η2:η2-C(R)C}]oligothiophenes
作者:Taeg Sung Jung、Joo Hwan Kim、Eun Kyung Jang、Dong Hyun Kim、Yoon-Bo Shim、Bongjin Park、Sung Chul Shin
DOI:10.1016/s0022-328x(00)00003-6
日期:2000.4
α,ω-Bis[Co2(CO)6μ-η2:η2-C(R)C}]oligothiophene derivatives (6–10), in which two dicobalt hexacarbonyl acetylides are π-conjugated onto both terminals of the oligothiophene, were prepared by the reaction of the α,ω-bis(alkynyl)oligothiophenes (1–5) with Co2(CO)8. The molecular structures of new compounds were identified by spectroscopic methods and elemental analysis. In cyclic voltammetry of the clusters
α,ω二[CO 2(CO)6 μ-η 2:η 2 -C(R)C}]低聚噻吩衍生物(6 - 10),其中,两个二钴六羰基乙炔化物是π共轭到两个端子低聚噻吩的,是由α的反应制得,ω -双(炔基)的低聚噻吩(1 - 5)用Co 2(CO)8。通过光谱方法和元素分析鉴定了新化合物的分子结构。在所述簇的循环伏安法6 - 10,两个基于低聚噻吩-氧化过程(一个用于7)发生-0.2和V之间1.5,0.0和-1.6伏,这是不存在的低聚噻吩(之间发生金属簇部分的一个还原过程1 - 5)。簇的预期电子通信的沉默6 - 10可以归因于还原过程,随后在环境温度下快速化学反应。簇6 - 10通常表现出三个特征波段:适度紧张,高能带,强中等能带和弱低能量带。高能带归因于π–π *局部激发。中能带和低能带可以归因于金属配体(d Co –π *配体)簇部分的电荷转移跃迁。