title: Formation of Zn(II) and Cd(II) coordination polymers assembled by triazine-based polycarboxylate and in-situ-generated pyridine-4-thiolate or dipyridylsulfide ligands: observation of an unusual luminescence thermochromism.
abstract: Three novel coordination polymers, [Cd(5)(HTTHA)(2)(Hpt)(4)(H(2)O)]·4H(2)O (1; H(6)TTHA = 1,3,5-triazine-2,4,6-triamine hexaacetic acid, Hpt = pyridinium-4-thiolate), {[Cd(3)(TTHA)(dps)(H(2)O)(3)](2)}·H(2)O (2), and [Zn(3)(TTHA)(dps)(H(2)O)]·5H(2)O (3; dps =4,4'-dipyridylsulfide), have been synthesized by the flexible hexapodal acid H(6)TTHA and in-situ-generated Hpt and dps ligands from a 4,4'-dipyridyldisulfide (dpds) precursor through cleavage of both S-S and S-C(sp(2)) bonds and temperature-dependent chemical rearrangement under hydrothermal conditions. Polymers 2 and 3 exhibit 3D frameworks, while in 1, the extended 3D network can be described as 2D layers further bridged via H-bond interaction. Intriguingly, the three compounds have shown an unusual luminescence thermochromism. Upon decreasing the temperature from 298 to 10 K, the emission bands grow in intensity and change in color dramatically.
authors: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
authors: Qilong
authors: Q
authors: Zhu
authors: Tianlu
authors: T
authors: Sheng
authors: Chunhong
authors: C
authors: Tan
authors: Shengmin
authors: S
authors: Hu
authors: Ruibiao
authors: R
authors: Fu
authors: Xintao
authors: X
authors: Wu