Synthesis, crystal structure and luminescence properties of homodinuclear lanthanide complexes with a new tetrapodal thenylsalicylamide ligand
作者:Xue-Qin Song、Li Wang、Meng-Meng Zhao、Guo-Quang Cheng、Xiao-Run Wang、Yun-Qiao Peng
DOI:10.1016/j.ica.2013.03.040
日期:2013.6
Five new homodinuclear lanthanide(III) complexes with a new tetrapodal thenylsalicylamide ligand (L), of formulae [Nd2L2(NO3)(6)(CH3OH)(2)]center dot 2H(2)O center dot 2CH(3)OH (1), and [Ln(2)L(2)(NO3)(6) (CH3OH)(2)]center dot 4CH(3)OH, Ln = Sm (2), Eu (3), Gd (4), Tb (5)) have been synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR spectroscopy and molar conductance analysis. The two arms of L ligand arranged in a complementary head to head fashion to bind two lanthanide to form a cage-like coordination dimer with the other two uncoordinated arms constructing interesting three dimensional supramolecular structures. The europium and terbium containing compounds both exhibit luminescence of the referring trivalent lanthanide ions, giving a red luminescence for Eu(III) and a green luminescence for Tb(III) triggered by an efficient antenna effect of the thenylsalicylamide group. (C) 2013 Elsevier B.V. All rights reserved.