From triplesalen to triplesalacen: Synthesis spectroscopic, redox, and magnetic properties of the trinuclear CuII3 triplesalacen complex
作者:Stephan Walleck、Hubert Theil、Maik Heidemeier、Gabriele Heinze-Brückner、Anja Stammler、Hartmut Bögge、Thorsten Glaser
DOI:10.1016/j.ica.2010.06.054
日期:2010.12
Abstract The tris(tetradentate) triplesalacen ligand H6talacen and its trinuclear copper complex, namely [(talacen)CuII3], were synthesized and its molecular and electronic structure determined. The ligand is prepared by the triple condensation of 2,4,6-trisacetyl-1,3,5-trihydroxybenzene (1) and excess acacen half-unit (2). The molecular structure of [(talacen)CuII3] exhibits a strong ligand folding around
摘要合成了三(四齿)三链烯配体H6talacen及其三核铜络合物[(talacen)CuII3],并确定了其分子和电子结构。通过2,4,6-三乙酰基-1,3,5-三羟基苯(1)和过量的acacen半单元(2)的三重缩合制备配体。[(talacen)CuII3]的分子结构表现出围绕中心CuII-酚盐键的强配体折叠。该配体折叠比在三核铜三链烯配体中观察到的强。电子吸收光谱在32400 cm-1处表现出突出的强带,并且d-d跃迁在19000 cm-1处。这些光谱特征与配体折叠有关,后者打开了OPh(pz)–Cu II(dx 2-y 2)的键合路径。电化学研究提供了相对于Fc + / Fc处于0.17 V相对较低电势的不可逆氧化,这被认为是中心间苯三酚骨架的以配体为中心的氧化。根据自旋极化机制,建立了J = 1.20 cm-1(H = ∑ ij-2 J ij S i S j)的铁磁耦合。对中央间苯