Four triazole-bridging coordination polymers containing (m-phenol)-1,2,4-triazole:: Syntheses, structures and properties of fluorescence and magnetism

Four triazole-bridging coordination complexes, [Zn-4(Ptr)(2)(SO4)(3)(mu(3)-OH)(2)(H2O)(4)](n) (1), [Hg(CN)(2)(ptr)](n) (2), [Hg(Cl)(2)(ptr)](n) (3), and [Cu-2(mu(2)-ptr)(2)(mu(2)-F)(2)](n) (SiF6)(n) center dot 2nH(2)O (4), were synthesized with (m-phenol)-1,2,4-triazole (ptr). Compounds 1-4 with extended structures of 4-substituted 1,2,4-triazole are rarely reported. The layered structure of I can be regarded as constructed from the 2-D inorganic backbone of SO42- (2) anions bridging [Zn-4(mu(3)-OH)(2)(H2O)(2)](6-) subunits with the ptr ligands anchoring to both sides of backbone. Compounds 2 and 3 are the first mercury(II) complexes with 4-substituted 1,2,4-triazole, which feature the ptr ligand acting as a bidentate ligand bridging the Hg(II) atoms to form arciform -Hg-ptr-Hg-ptr chains. The structure of 4 is constructed from the F atoms bridging Cu atoms in symmetrical mu(2)-coordination mode to form a zigzag cationic chain with each ptr ligand bridging a pair of Cu atom on the both sides, resulting in a nonplanar 5-membered [Cu2N2F] ring. Fluorescent properties of 1-4 were characterized and the magnetic property of 4 shows antiferromagnetic interaction between the copper(II) ions. (c) 2006 Elsevier Inc. All rights reserved.