Two 3D photoluminescent Zn(ii) complexes constructed from 5-amino-1-H-tetrazole with aromatic polycarboxylate ligands†
Abstract
Two new Zn(II) complexes, namely, [Zn2(BTEC)0.5(ATZ)2(H2O)3]·H2O (1) and [Zn1.5(2,5-PYDC)(ATZ)(H2O)]2 (2) have been assembled from 5-amino-1-H-tetrazole (HATZ) with two aromatic polycarboxylate ligands under hydrothermal conditions (H4BTEC = 1,2,4,5-benzenetetracarboxylic acid, 2,5-PYDC = 2,5-pyridinedicarboxylic acid). Single crystal X-ray analysis reveals that both complexes display three-dimensional (3D) structures. Complex 1 is a binodal (4,4)-connected bbf net with a (64·82)(66)2 topological symbol. Complex 2 displays a trinodal (3,3,4)-connected net with (4·102)2(102·12)2(42·102·122) topology. In the two structures, all the HATZ ligands are deprotonated and act as the anions, and the ATZ− anions all connected two Zn(II) centers with a μ2-mode. In addition, the two complexes display photoluminescence at 442 nm (λex = 342 nm) and 468 nm (λex = 374 nm), respectively. And their thermal stability has also been studied.