title: Hydrothermal syntheses, crystal structures, and characteristics of a series of Cd-btx coordination polymers (btx = 1,4-Bis(triazol-1-ylmethyl)benzene).
abstract: Four novel cadmium-btx (btx = 1,4-bis(triazol-1-ylmethyl)benzene) coordination polymers [Cd(btx)(2)(NO(3))(2)](n)(1), [Cd(btx)(2)Cl(2)](n)(2), [Cd(btx)(SO(4))(H(2)O)(2)](n)(3), and [Cd(btx)(S(2)O(7))(H(2)O)](n)(4) have been prepared by hydrothermal reaction (140 or 180 degrees C) and characterized. Both 1 and 2 have two-dimensional rhombohedral grid structures, 3 possesses a two-dimensional rectangular grid structure, and 4 displays a three-dimensional framework, which is formed by btx bridging parallel layers. To the author's best knowledge, polymer 4 is the first Cd(II) polymer in which the Cd(II) ion is eight-coordinated in a hexagonal bipyrimidal geometry. In addition, we studied the effects of temperature on the hydrothermal reaction system of btx and CdSO(4) and found that different products can be obtained at different temperatures. Furthermore, polymer 3 possesses a very strong third-order NLO absorptive effect with an alpha(2) value of 1.15 x 10(-)(9) m W(-1). Polymers 2-4 display strong fluorescent emissions in the solid state at room temperature. The DTA and TGA results of the four polymers are in agreement with the crystal structures.
authors.affiliation: Department of Chemistry, Zhengzhou University, Henan 450052, P. R. China.
authors.forename: Xiangru
authors.initials: X
authors.lastname: Meng
authors.forename: Yinglin
authors.initials: Y
authors.lastname: Song
authors.forename: Hongwei
authors.initials: H
authors.lastname: Hou
authors.forename: Huayun
authors.initials: H
authors.lastname: Han
authors.forename: Bo
authors.initials: B
authors.lastname: Xiao
authors.forename: Yaoting
authors.initials: Y
authors.lastname: Fan
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhu