Halogen⋅⋅⋅π Interactions in Supramolecular Architecture of 1D Coordination Polymers and Their Electrical Conductance. Issue 12 (25th March 2019)

• Record Type: Journal Article
• Authors: Islam, Sakhiul; Datta, Joydeep; Maity, Suvendu; Dutta, Basudeb; Ahmed, Faruk; Ghosh, Prasanta; Ray, Partha Pratim; Mir, Mohammad Hedayetullah
• Is Part Of: ChemistrySelect. Volume 4:Issue 12(2019)
• Page Start: 3294
• Page End: 3299
• Publication Date: 2019-03-25
• Subjects: Cadmium -- Coordination polymer -- Halogen⋅⋅⋅π interactions -- Impedance analysis -- Schottky diode; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201900578
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Two isotypical Cd(II) based one‐dimensional coordination polymers (1D CPs) [Cd2 ( p ‐clba)4 (bpy)2 ]⋅(C2 H5 OH) (1 ) and [Cd2 ( p ‐brba)4 (bpy)2 ]⋅(C2 H5 OH), (2 ) (H2 p ‐clba= para ‐chlorobenzoic acid, H2 p ‐brba= para ‐bromobenzoic acid and bpy=4, 4′‐bipyridine) have been synthesized and characterized by X‐ray structure analysis. In the solid‐state strcuture, both the compounds undergo X⋅⋅⋅п (X=Cl or Br) interactions to generate two‐dimensional (2D) supramolecular architectures. Here, due to the larger size and more polarisability of Br atom, Br⋅⋅⋅п interaction is stronger than Cl⋅⋅⋅п, which is accounted for the stronger interchain interactions in 2 as compared to 1 . This is depicted in the observed electrical conductivity of the compounds. The compound 2 with stronger interchain interactions shows better charge transport and hence, increasing conductivity. Moreover, band gap of the CPs has been obtained by DFT computation, which also supports the progression of conductivity. Abstract : This study highlights the effect of halogen⋅⋅⋅π interactions on charge transport and electrical conductivity of coordination polymers as a result of the modification of para ‐substituent on the benzoate ligands.