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Issue 40, 2019
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Two zinc(ii)-based coordination polymers with flexible dicarboxylate and pyridine mixed ligands: effect of π⋯π interactions on electrical activity

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Abstract

Two novel coordination polymers (CPs) [Zn(cis-1,4-chdc)(4-phpy)]n, (1) and [Zn(cis-1,4-chdc)(py)]n, (2) (1,4-H2chdc = 1,4-cyclohexanedicarboxylic acid, 4-phpy = 4-phenylpyridine and py = pyridine) were synthesized and characterized by elemental analysis, infrared spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction and thermogravimetric analyses. Both compounds formed a one-dimensional (1D) chain-like structure constructed by Zn2(CO2)4 paddle-wheel dimers interconnected via double strands of cis-1,4-chdc-bridges, whereby pyridine-based ligands were decorated as arms on both sides of Zn2 dimers. In compound 1, polymeric 1D chains underwent self-assembly via π⋯π stacking interactions among 4-phpy ligands to form a 2D network, whereas this type of interaction was absent in 2. Interestingly, both compounds exhibited electrical conductivity and revealed Schottky barrier diode behavior. However, compound 1 showed better electrical conductivity (1.09 × 10−3 S m−1) with respect to compound 2 (6.01 × 10−5 S m−1) because of π⋯π interactions.

Graphical abstract: Two zinc(ii)-based coordination polymers with flexible dicarboxylate and pyridine mixed ligands: effect of π⋯π interactions on electrical activity

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Publication details

The article was received on 01 Aug 2019, accepted on 18 Sep 2019 and first published on 18 Sep 2019


Article type: Paper
DOI: 10.1039/C9NJ03986D
New J. Chem., 2019,43, 16071-16077

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    Two zinc(II)-based coordination polymers with flexible dicarboxylate and pyridine mixed ligands: effect of π⋯π interactions on electrical activity

    Akhtaruzzaman, P. Das, S. Khan, S. Maity, S. Naaz, S. Islam, P. Ghosh, P. P. Ray and M. H. Mir, New J. Chem., 2019, 43, 16071
    DOI: 10.1039/C9NJ03986D

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