Coordination networks from zero-dimensional metallomacrocycle, one-dimensional chain to two-dimensional sheet based on a ditopic diiminopyridine ligand and group 12 metals

Jin Yang, Biao Wu*, Fuyu Zhuge, Jianjun Liang, Chuandong Jia, Yao Yu Wang, Ning Tang, Xiao Juan Yang, Qi Zhen Shi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

The reaction of a ditopic diiminopyridine ligand 2,6-bis(1-(2,6- diisopropyl-4-(pyridin-3-yl)phenylimino)ethyl)pyridine (L) with group 12 metal salts in various solvent systems afforded 12 metal-organic coordination complexes, including zero-dimensional (0D) metallomacrocycle, one-dimensional (1D) chain, and two-dimensional (2D) network structures: [Zn4Cl 8L2]•2C7H8•2CH 3COCH3•3H2O (1a), {[Zn2Cl 4L]•2CH3OH•2CHCl3•2H 2O}n (1b), {[ZnCl2L]•0.5CH 2Cl2•0.5H2O}n (1c), {[ZnBr 2L]•CH2Cl2}n (2), [ZnI 2L]n (3), {[Zn(NO3)2L 2•2C7H8]}n (4), {[CdCl 2L2]•2CH2Cl2}n (5), {[Cd(NO3)2L2]•CH2Cl 2}n (6), {[Cd(ClO4)2L 2]•CH2Cl2}n (7), {[Hg 42-L2)(μ2-Cl 2)(μ-HgCl2)Cl6]•2H2O} n (8), {[HgBr2L]•CH3CN•0.5CH 2Cl2}n (9), and {[HgI2L]•0. 5CH2Cl2}n (10). In these complexes, the semirigid ligand L exhibits four kinds of coordination modes [(syn, syn, syn), (syn, syn, anti), (anti, anti, syn), (anti, anti, anti)], leading to the formation of various supramolecular structures. Complex 1a is a tetranuclear metallomacrocycle. 1b contains 1D zigzag chains propagating along two different directions, which further pack into a noninterpenetrated three-dimensional (3D) framework by hydrogen-bonding interactions. Complexes 1c, 2, 3, 9, and 10 exhibit a 1D helical chain structure, while 4, 5, 6, and 7 are 1D looped-chain coordination polymers. Complex 8 displays an unprecedented pentanuclear Hg(II)-based 2D network with both HgCl2 and Hg2Cl 2 bridges. It is noteworthy that 1a and 1b are supramolecular isomers formed in different solvent systems. The effects of the solvent, metal center, and anion on the different conformations adopted by the ligand and the structure of the products have been discussed. Additionally, the luminescent properties of the complexes have been investigated in the solid state, which display increased ligand-based fluorescence emission at room temperature.

Original languageEnglish
Pages (from-to)2331-2341
Number of pages11
JournalCrystal Growth and Design
Volume10
Issue number5
DOIs
Publication statusPublished - 5 May 2010
Externally publishedYes

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