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Title: Luminescent sulfonate coordination polymers: Synthesis, structural analysis and selective sensing of nitroaromatic compounds
Authors: Singh N.
Singh U.P.
Butcher R.J.
Published in: CrystEngComm
Abstract: With a flexible anthracene-based redox active ligand (9,10-bis((1H-imidazol-1-yl)methyl)anthracene (BIA)), a sulfonic acid coligand (1,5-naphthalenedisulfonic acids (NDS) and 5-sulfoisophthalic acid sodium salt (SIA)), six Zn(ii) and Cd(ii) coordination polymers (CPs), viz. [Zn(BIA)3(NDS)2] (CP-1a), [Zn(BIA)(SIA)] (CP-1b), [Cd(cis-BIA)2(NDS)2(DMF)2] (CP-1c), [Cd(trans-BIA)2(SIA)2(DMF)2] (CP-1d), [Cd2(BIA)2(NDS)2(DMF)] (CP-1e) and [Cd·Na(BIA)2(SIA)2(DMF)2(H2O)] (CP-1f), were synthesized hydrothermally. These coordination polymers were characterized by IR spectroscopy, thermogravimetric analysis (TGA) and single crystal X-ray crystallography. All these CPs, with strong photoluminescence in suspensions, have been used for sensing of nitroaromatic compounds. The luminescence properties of these CPs are selectively enhanced by picric acid (PA), dinitrotoluene (DNT) and nitroaniline (NA). The effect of picric acid on the surface of the CPs was also analyzed by scanning electron microscopy. The electronic properties of the BIA ligand and CP-1b were analyzed by cyclic voltammetry. Theoretical studies were performed by DFT calculation to understand the sensing mechanism of these polymers towards PA. Gas adsorption analysis of the Cd-CPs showed negligible uptake of N2, CO2 and CH4 whereas the Zn-CPs showed moderate uptake of these gases. © 2017 The Royal Society of Chemistry.
Citation: CrystEngComm (2017), 19(46): 7009-7020
Issue Date: 2017
Publisher: Royal Society of Chemistry
ISSN: 14668033
Author Scopus IDs: 57211016562
Author Affiliations: Singh, N., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Singh, U.P., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Butcher, R.J., Department of Chemistry, Howard University, Washington, DC 20059, United States
Funding Details: The authors are grateful to the CSIR, New Delhi, India for financial assistance. Neetu Singh thankfully acknowledges UGC, New Delhi for providing fellowship. We thank Dr. Paritosh Mohanty, Department of Chemistry, IIT Roorkee, for the gas adsorption study.
Corresponding Author: Singh, U.P.; Department of Chemistry, Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Journal Publications [CY]

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