Discrete Metal Complexes of Two Multiply Armed Ligands
作者:Muna R. A. Al-Mandhary、Christopher M. Fitchett、Peter J. Steel
DOI:10.1071/ch06116
日期:——
syntheses and metalcomplexes of 1,2,4,5-tetrakis(8-quinolyloxymethyl)benzene 1 and hexakis(8-quinolyloxymethyl)benzene 2 are described. X-Ray crystal structures are reported of the free ligand 1, a binuclear silver(i) and a tetranuclear copper(i) complex of 1, as well as a binuclear cobalt(ii) and trinuclear palladium(ii) and silver(i) complexes of 2. Within these discretemetalcomplexes the ligands
描述了1,2,4,5-四(8-喹啉氧基甲基)苯1和六(8-喹啉氧基甲基)苯2的合成和金属配合物。报告了游离配体 1、双核银 (i) 和四核铜 (i) 配合物 1 以及双核钴 (ii) 和三核钯 (ii) 和银 (i) 的 X 射线晶体结构2 的配合物。在这些离散的金属配合物中,发现配体采用一系列配位模式,由于 CH2O 接头单元赋予的灵活性,配体臂的相对方向有相当大的变化。
A unique ‘ON–OFF–ON’ switch with two perturbations at two different concentrations of Ag+
作者:Prabhpreet Singh、Subodh Kumar
DOI:10.1016/j.tetlet.2005.10.127
日期:2006.1
The dipod 1,2-bis(8-quinolinoxymethyl)benzene 3 and tetrapod 1,2,4,5-tetrakis(8-quinolinoxymethyl) benzene 4 show two perturbations in fluorescence with Ag+, (i) fluorescence quenching with < 1.0 equiv of AgNO3 lambda(max) a 395 nm and (ii) fluorescence enhancement at lambda(max) 500 nm with > 3 equiv of AgNO3. This 'ON-OFF-ON' switching of 3 and 4 in comparison with simultaneous fluorescence quenching and enhancement in the case of 8-methoxyquinoline 1 and the tripod 1,3,5-trimethyl-2,4,6-tris(8-quinolin-oxymethyl)benzene 2 point to the unique role of molecular architectures arising due to the number and spatial positions of quinoline units in the fluorescence behaviour of an 8-alkoxyquinoline moiety towards Ag+. (c) 2005 Elsevier Ltd. All rights reserved.