Two zinc(ii)-based coordination polymers with flexible dicarboxylate and pyridine mixed ligands: effect of π⋯π interactions on electrical activity. (1st October 2019)

• Record Type: Journal Article
• Authors: Akhtaruzzaman, ; Das, Pubali; Khan, Samim; Maity, Suvendu; Naaz, Sanobar; Islam, Sakhiul; Ghosh, Prasanta; Ray, Partha Pratim; Mir, Mohammad Hedayetullah
• Is Part Of: New journal of chemistry. Volume 43:Number 40(2019)
• Page Start: 16071
• Page End: 16077
• Publication Date: 2019-10-01
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c9nj03986d
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : We synthesized two Zn(ii )-based 1D coordination polymers with paddle-wheel units using flexible 1, 4-cyclohexanedicarboxylate linkers; these compounds exhibited electrical conductivity and Schottky barrier diode behavior. 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-H2 chdc = 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.