Homo- and Heterometallic[2×2] Grid Arrays Containing RuII, OsII, and FeII Subunits and their Mononuclear RuII and OsII Precursors: Synthesis, Absorption Spectra, Redox Behavior, and Luminescence Properties
作者:Dario M. Bassani、Jean-Marie Lehn、Scolastica Serroni、Fausto Puntoriero、Sebastiano Campagna
DOI:10.1002/chem.200305441
日期:2003.12.5
a series of [2x2] molecular grids have been investigated. The latter were prepared either by means of sequential self-assembly, or by a stepwise protection/deprotection procedure, and are based on a ditopic hexadentate ligand 1 in which two terpyridine-like binding sites are fused together in a linear arrangement. The molecular grids studied include the homometallic species [[Fe(1)](4)](8+) (Fe(2)Fe(2))
研究了一系列[2x2]分子网格的吸收光谱,氧化还原行为和发光特性(在刚性矩阵中为77 K,在流体溶液中为室温)。后者是通过顺序自组装或通过逐步保护/脱保护程序制备的,并且基于双位六齿配体1,其中两个类吡啶类结合位点以线性排列融合在一起。研究的分子网格包括同金属物种[[Fe(1)](4)](8+)(Fe(2)Fe(2))和异金属物种[[Ru(1)](2)[Fe (1)](2)](8+)(Ru(2)Fe(2))和[[Os(1)](2)[Fe(1)](2)](8+)(Os( 2)Fe(2))。为了比较,研究了单核络合物[Ru(1)(2)](2+)(1-Ru)和[Os(1)(2)](2+)(1-Os)的性质。 。所有这些化合物在UV区显示出非常强的吸收带(ε在10(5)-10(6)M(-1)cm(-1)范围内,这归因于自旋允许的以配体为中心(LC)的转变)以及强烈的金属到配体的电荷转移(MLCT)