Two cluster-based metal–organic frameworks with selective detection of Hg2+ ion and magnetic properties

Two cluster-based metal–organic frameworks {[Cd5L4Br10]·2(CH3)2NH}n (1) and {[MnIII3OL(TA)3]F·sol}n (2) (L = 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-trimethylbenzene, TA = terephthalate anion) containing a semi-rigid tribenzimidazol-based ligand were synthesized and characterized. Single crystal X...

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Bibliographic Details
Published in:CrystEngComm 2021-09, Vol.23 (35), p.6053-6058
Main Authors: Lin, Qingfang, Zong, Zhihui, Tong, Jing, Xie, Wen, Liang, Lili
Format: Article
Language:English
Subjects:
Antiferromagnetism
Clusters
Crystal structure
Crystallography
Fluorescence
Magnetic properties
Manganese ions
Mercury (metal)
Metal-organic frameworks
Single crystals
Trimethylbenzene
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Summary:Two cluster-based metal–organic frameworks {[Cd5L4Br10]·2(CH3)2NH}n (1) and {[MnIII3OL(TA)3]F·sol}n (2) (L = 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-trimethylbenzene, TA = terephthalate anion) containing a semi-rigid tribenzimidazol-based ligand were synthesized and characterized. Single crystal X-ray analyses show that the structure of 1 contains pentanuclear cadmium clusters with an interesting four-fan shape, in which each μ2-Br interlinks two crystallographically unique Cd atoms, while 2 contains a trimanganese cluster with three Mn3+ ions present in an equilateral triangle distribution. Furthermore, 1 exhibits highly selective fluorescent detection of trace Hg2+, with the detection limit of 5.26 × 10−7 M−1. 2 shows antiferromagnetic interactions between Mn3+ ions.
ISSN:1466-8033
DOI:10.1039/d1ce00826a