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A series of transition metal coordination complexes, [Zn3(2‐aptt)2(1,4‐bdc)2]n (1), [Zn4(2‐aptt)4(H2pma)2(H2O)4]n (2), [Zn2(2‐aptt)2(3‐pc)2(H2O)4] (3), and [Pb(2‐ptt)]n (4) were synthesized under solvothermal conditions using the pyridine containing mercapto‐triazole ligand 2‐apttH [4‐amino‐3‐(2‐pyridyl)‐1H‐1,2,4‐triazole‐5‐thione] as a main building block. Their structures were determined by single‐crystal X‐ray diffraction analyses and further characterized by elemental analyses and IR spectroscopy. Notably, desamination reaction exists in the formation of complex 4, in which the ligand 2‐apttH deaminated to generate the ligand 2‐pttH2 [3‐(2‐pyridyl)‐1H‐1,2,4‐triazole‐5‐thione]. The four complexes exhibit structural diversity: complex 1 presents an interesting 3D framework, complexes 2 and 4 feature 2D networks, whereas complex 3 shows dinuclear structure. Moreover, the luminescent properties of complexes 1–4, the first and second ligands were also studied. [ABSTRACT FROM AUTHOR]

Two novel trinuclear Hg(II) complexes, namely, [Hg3Cl6(L1)2] (1) and [Hg3Cl6(L2)2] (2), (L1 = trans-4-[(p-N,N-dimethylamino)styryl]-N-acetic-acidpyridinium, L2 = trans-4-[(p-N-2-hydroxyethyl-N-methylamino)styryl]-N-acetic-acid pyridinium) have been synthesized and characterized by IR spectroscopy, elemental analysis, and X-ray single-crystal diffraction. In both 1 and 2, the tri- and tetra-coordinated Hg(II) atoms are linked by the carboxyl groups, resulting in the formation of trinuclear structures. Their linear absorption, one-photon fluorescence, two-photon fluorescence, and two-photon pumped up-conversion lasing are investigated. Upon pumped by 1064 nm laser beam, complexes 1 and 2 exhibit excellent two-photon lasing at ∼627 nm. [ABSTRACT FROM AUTHOR]

Two new coordination polymers formulated as {[Zn(bdic)(bmt)H2O] · 0.5H2O} n (1) and {[Cd(bdic)(bmt)(H2O)2] · 2H2O} n (2) (H2bdic = 1,3-benzenedicarboxylic acid, bmt = 1-((benzotriazol-1-yl)methyl)-1-H-1,2,4-triazole) have been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. Both coordination polymers exhibit 1-D chain structure where bmt is unidentate and bdic2− bridging. In 1, bmt hangs at two sides of the main chain, whereas bmt hangs at one side of the main chain in 2. Fluorescent properties have also been determined. [ABSTRACT FROM AUTHOR]