摘要:
Two new near-infrared (NIR) luminescent Zn-Nd complexes [(ZnLNd)-Nd-1(OAc)(NO3)(2)] (3) and [(ZnLNd)-Nd-2(DMF)(2)(NO3)(3)] (4) have been obtained with two salen-type Schiff-base ligands H2L1 and H2L2, (H2L1=N,N'-bis(3-methoxysalicylidene)-(1s, 2s)-(-)1,2-dipheneylethylenediamine and H2L2=N,N'-bis(3-methoxysalicylidene)-(s)-2,2-diamine-1,1'-binaphthyl) from the reaction of different chiral diamines with o-vanillin. The X-ray crystal structure analysis reveals that both of them crystallize in the chiral space groups with P2(1), a = 10.1669(6), b = 19.3775(11), c = 17.4639(10) angstrom, beta = 94.8710(10)degrees, V = 3428.1(3) angstrom(3), Z = 4 for 3, and C2, a = 22.1914(13), b = 9.7886(6), c = 22.0138(13) angstrom, beta = 118.9590 (10)degrees, V=4372.5(4)angstrom(3), Z = 4 for 4. Complexes 3-4 are both dinuclear Zn-Nd structures, while suitable choice of chiral Schiff-base ligands could induce the different complexions of ligands and metal ions, and the functional control of ligand character shows a potentially effective way to the fine-tuning properties of NIR luminescence from Nd ions. (C) 2008 Elsevier B.V. All rights reserved.