Issue 25, 2020

Dinuclear complexes of Mn, Co, Zn and Cd assembled with 1,4-cyclohexanedicarboxylate: synthesis, crystal structures and acetonitrile fluorescence sensing properties

Abstract

Four dinuclear complexes: [Mn2(H2O)2(chdc)2(bipy)2], 1; [Co2(H2O)2(chdc)2(bipy)2]·H2O, 2; [Zn2(H2O)2(chdc)2(bipy)2]·H2O, 3; and [Cd2(H2O)2(chdc)2(bipy)2]·H2O, 4; chdc = e,a-cis-1,4,cyclohexanedicarboxylate and bipy = 2,2′-bipyridine, were attained as single crystals under ambient conditions. Crystallographic studies show that complexes 1, 2 and 3 are isostructural and crystallize in the monoclinic system with the P21/c space group. The metal centers in these complexes are hexa-coordinated with a distorted octahedral coordination sphere. Complex 4 crystallizes in the triclinic system with the P[1 with combining macron] space group; in this compound, the metal centers are hepta-coordinated and their coordination sphere is distorted-capped trigonal prismatic. Magnetic property measurements reveal that complexes 1 and 2 exhibit weak antiferromagnetic ordering. Complex 4 displays solid-state blue emission properties and a highly sensitive response to acetonitrile in water based on turn-on fluorescence with a low detection limit of 1.1 μM and selectivity over common polar organic solvents.

Graphical abstract: Dinuclear complexes of Mn, Co, Zn and Cd assembled with 1,4-cyclohexanedicarboxylate: synthesis, crystal structures and acetonitrile fluorescence sensing properties

Supplementary files

Article information

Article type
Paper
Submitted
22 Mar 2020
Accepted
17 May 2020
First published
18 May 2020

New J. Chem., 2020,44, 10317-10325

Dinuclear complexes of Mn, Co, Zn and Cd assembled with 1,4-cyclohexanedicarboxylate: synthesis, crystal structures and acetonitrile fluorescence sensing properties

L. D. Rosales-Vázquez, D. Martínez-Otero, V. Sánchez-Mendieta, J. Jaramillo-García, A. Téllez-López, R. Escudero, F. Morales, J. Valdes-García and A. Dorazco-González, New J. Chem., 2020, 44, 10317 DOI: 10.1039/D0NJ01410A

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