Syntheses and Crystal Structures of a Series of Zn(II)/Cd(II) Coordination Polymers Constructed from a Flexible 6,6′-Dithiodinicotinic Acid
Ya-Nan Zhang
Ping Liu
Yao-Yu Wang
Ling-Yue Wu
Ling-Yan Pang
Qi-Zhen Shi
10.1021/cg101433t.s003
https://acs.figshare.com/articles/journal_contribution/Syntheses_and_Crystal_Structures_of_a_Series_of_Zn_II_Cd_II_Coordination_Polymers_Constructed_from_a_Flexible_6_6_Dithiodinicotinic_Acid/2656861
Five novel Zn(II)/Cd(II)-based coordination polymers <b>1</b>–<b>5</b> with a flexible disulfide derivative of the nicotinate 6,6′-dithiodinicotinic acid (H<sub>2</sub>cpds) and two rodlike <i>N</i>,<i>N</i>′-donor ligands (bpa =1,2-bi(4-pyridyl)ethane; bpp = 1,3-bis(4-pyridyl)propane) have been successfully synthesized under the liquid diffusion condition and characterized by elemental analysis, IR spectra, and X-ray diffraction, namely {[Zn(cpds)]·H<sub>2</sub>O}<sub><i>n</i></sub> (<b>1</b>), {[Zn(cpds)(bpa)<sub>0.5</sub>]}<sub><i>n</i></sub> (<b>2</b>), {[Zn(cpds)(bpp)]}<sub><i>n</i></sub> (<b>3</b>), {[Cd(cpds)(bpa)<sub>1.5</sub>]·H<sub>2</sub>O}<sub><i>n</i></sub> (<b>4</b>), and {[Cd<sub>2</sub>(cpds)<sub>2</sub>(bpp)·(H<sub>2</sub>O)<sub>3</sub>]·4H<sub>2</sub>O}<sub><i>n</i></sub> (<b>5</b>). Complexes <b>1</b>–<b>5</b> display various coordination motifs due to different conformations, and coordination modes of the H<sub>2</sub>cpds ligand, at the same time the effect of the auxiliary ligands plays important roles in the construction of extended supramolecular networks. Complexes <b>2</b>–<b>4</b> all exhibit 2D layer structures, in which <b>2</b> displays a 2-fold 2D → 2D parallel interpenetration framework containing a rotaxane-like motif and <b>3</b> is a 2D 4<sup>4</sup> gridlike layer. Compound <b>4</b> contains two kinds of 2D chiral layers composed of three types of single-helical chains and two types of double-stranded helices. Two high-dimensional complexes (3D) with a microporous network containing a 1D metal–organic nanotube filled with plenty of free water molecules for <b>1</b>, and a 3-fold interpenetrating network with (4<sup>6</sup>·6<sup>4</sup>) topology by considering the cadmium dimer unit as a five-connected node for <b>5</b>, are observed. Solid-state properties of thermal stability, X-ray powder diffractions, and the photoluminescence properties at room temperature for these crystalline materials have been investigated.
2011-05-04 00:00:00
H 2cpds
2 D chiral layers
cadmium dimer unit
2 D 44 gridlike layer
coordination motifs
exhibit 2 D layer structures
2 displays
water molecules
coordination modes
IR spectra
photoluminescence properties
supramolecular networks
Complexe
Zn
Compound 4
Crystal Structures
type
microporous network
interpenetrating network
interpenetration framework
H 2cpds ligand
diffusion condition
diffraction
room temperature