摘要:
Six complexes based on a flexible tripodal ligand H(3)TTTA (2,2',2 ''-[1,3,5-triazine-2,4,6-triyltris(thio)]-tris-acetic acid) have been hydrothermally synthesized and structurally characterized. X-ray single-crystal diffractions reveal that they have rich structural chemistry: mononuclear, [Zn(HTTTA)(2,2'-bPy)(H2O)(3)](n) (1); dimeric metallamacrocycle, [Zn(HTTTA)(2,2'-bipy)(H2O)](n) (2) and [Cd(HTTTA)(2,2'-bipy)(H2O)center dot H2O](n) (3); two-dimensional networks with binodal (3,6)-connected Cdl(2) topology based on linear trinuclear M-3(mu(2)-CO2)(4)(mu(2)-CO2)(2) SBUs (Secondary Building Units), [M-3(TTTA)(2)(2,2'-bipy)(2)(H2O)(m)center dot nH(2)O](n) (M=Zn.4, m=0, n=4; Cd.5 and Mn.6, m=2; n=2). The value of pH and the metal ions has large influences on the resulting structures. The flexible tricarboxylic acid exhibits four coordination modes from monodentate to mu(6)-bridge. Fluorescence and magnetic properties of the complexes have also been investigated in details. (C) 2011 Elsevier Inc. All rights reserved.