Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 4, 2019
Previous Article Next Article

From mononuclear to two-dimensional cobalt(II) complexes based on a mixed benzimidazole–dicarboxylate strategy: syntheses, structures, and magnetic properties

Author affiliations

Abstract

Based on a benzimidazole derivative and three different dicarboxylates, three new cobalt(II) complexes, namely [Co(1,3-BDC)2(MBIm)2] (1), [Co(SCA)2(MBIm)2]n (2), and {[Co(1,4-BDC)3(MBIm)2]·2DMF}n (3), (1,3-BDC = benzene-1,3-dicarboxylic acid, SCA = succinic acid, 1,4-BDC = benzene-1,4-dicarboxylic acid, MBIm = 5,6-dimethylbenzimidazole), have been hydrothermally synthesized and characterized structurally and magnetically. Single crystal X-ray diffraction revealed that 1 is a mononuclear neutral complex possessing a distorted tetrahedral geometry, 2 is a one-dimensional (1D) chain coordination polymer with the Co2+ centers arranged in Td symmetry, and 3 is a geometrically frustrated two-dimensional (2D) framework constructed from linear trimeric Co3 units with a mixed TdOhTd geometry. Magnetic investigation revealed the easy-axis magnetic anisotropy of the Co2+ ions in 1 and 2, and field-induced slow magnetic relaxation behaviors were observed at very low temperatures with an effective energy barrier of Ueff = 51.8 K and 11.3 K for 1 and 2, respectively. Notably, complex 2 is the first example of a 1D SIM featuring four-coordinate metal centers. For 3, no long-range magnetic ordering was established even at 1.8 K, which is mainly attributed to spin frustration. These studies illustrate that a mixed benzimidazole–dicarboxylate strategy is an effective strategy for the design and construction of functional molecular magnetic materials with distinct magnetic properties and structural diversity.

Graphical abstract: From mononuclear to two-dimensional cobalt(ii) complexes based on a mixed benzimidazole–dicarboxylate strategy: syntheses, structures, and magnetic properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Nov 2018, accepted on 09 Dec 2018 and first published on 12 Dec 2018


Article type: Paper
DOI: 10.1039/C8CE01931B
Citation: CrystEngComm, 2019,21, 749-757

  •   Request permissions

    From mononuclear to two-dimensional cobalt(II) complexes based on a mixed benzimidazole–dicarboxylate strategy: syntheses, structures, and magnetic properties

    J. Kong, D. Shao, J. Zhang, Y. Jiang, C. Ji and X. Huang, CrystEngComm, 2019, 21, 749
    DOI: 10.1039/C8CE01931B

Search articles by author

Spotlight

Advertisements