The syntheses, crystal structures and optical limiting effects of transition metal adducts bridged by bipyridyl-based ligands
摘要:
Two novel compounds [HgI2(bPt)](2) (1) and [MnCl2(bpt)(2)](n)center dot 2CH(3)OH (2) (bpt = N,N'-bis(3-pyridylmethyl)thiourea), have been synthesized via the self-assembly reaction in solution. Complex I possesses a two-dimensional supramolecular network formed by hydrogen bonds among repeating [HgI2(bpt)](2) dimeric units. Complex 2 is a one-dimensional coordination polymer containing uniform -MnCl2-(bpt)(2)-MnCl2-(bpt)(2)- double chain. Their limiting thresholds were determined to be 1.0 J cm(-2) for 1 and 0.7 J cm(-2) for 2 and the results testified that the skeletal structure and constituted metal nuclearity have a strong impact on the NLO properties of the complexes. (C) 2005 Elsevier B.V. All rights reserved.