Synthesis, crystal structures, and dye removal properties of a series of discrete and polymeric copper, zinc, cobalt, and cadmium complexes containing bis-pyridyl-bis-amine ligands

Journal Article · Sat Sep 15 04:00:00 EDT 2018 · Journal of Solid State Chemistry (Print)

DOI:https://doi.org/10.1016/J.JSSC.2018.06.008· OSTI ID:22890210

Wu, Jing-Yun; Chen, Che-Wei ^[1]

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1. Department of Applied Chemistry, National Chi Nan University, Nantou, 545, Taiwan (China)

Two bis-pyridyl-bis-amine ligands, trans-1,2-bis(m-picolyamino)cyclohexane (rac-m-picchxn) and trans-1,2-bis(p-picolyamino)cyclohexane (rac-p-picchxn), derived from trans-1,2-diaminocyclohexane (rac-chxn), were assembled with CuCl{sub 2}, ZnCl{sub 2}, ZnBr{sub 2}, Co(NO{sub 3}){sub 2}, and CdCl{sub 2} through reactants slow diffusion to afford corresponding metal complexes. Complexes [Cu(R,R-m-picchxn)Cl{sub 2}] (1) and [Zn(rac-m-picchxn)Br{sub 2}] (3) are mononuclear coordination structures, complex [Zn{sub 2}(rac-m-picchxn)Cl{sub 4}]{sub n} (2) adopts a one-dimensional (1D) helical chain, complex {[Co(R,R-p-picchxn)(NO_3)_2]·THF·2/3H_2O}{sub n} (4) has a two-dimensional (2D) kgm layer structure, complex [Cd(rac-p-picchxn)Cl{sub 2}]{sub n} (5) suits a 1D double-stranded zigzag chain structure, and compound [Cu(rac-chxn){sub 2}][CuCl{sub 3}] (6) is a Cu(I)-Cu(II) mixed-valence ionic product generated from the hydrolysis of rac-p-picchxn associated with the reduction of Cu(II) ion. The two bis-pyridyl-bis-amine ligands possess a chelating-bridging mode in forming infinite network and a chelating-only mode in forming discrete complexes. These metal–organic architectures show the influence of metal ion combining with organic ligand and anion on the structure variation. Noteworthy, chain polymers 2 and 5 could be utilized in the removal of methyl orange (MO), acid orange 7 (AO7), and malachite green (MG) from water through adsorptive processes. The adsorption dynamics of MO and AO7 on 2 and MG on both 2 and 5 obeyed a pseudo-second-order kinetics while that of MO and AO7 on 5 followed a pseudo-first-order kinetics.

• OSTI ID: 22890210
• Journal Information: Journal of Solid State Chemistry (Print), Journal Name: Journal of Solid State Chemistry (Print) Vol. 265; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: Netherlands
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CADMIUM CHLORIDES
CADMIUM COMPLEXES
COBALT NITRATES
COPPER CHLORIDES
CRYSTAL STRUCTURE
LIGANDS
METHYL ORANGE
NITROGEN OXIDES
POLYMERIZATION
POLYMERS
ZINC BROMIDES
ZINC CHLORIDES