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Issue 99, 2015
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Two reversible transformable mercury(ii) coordination polymers as efficient adsorbents for removal of dibenzothiophene

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Abstract

Three new compounds of Hg(II) have been synthesized, [Hg(quinoxaline)2(NO2)2] (1), [Hg3(μ-quinoxaline)2(μ-SCN)6]n (2) and [Hg(μ-quinoxaline)(μ-CN)2]n (3) through the reaction between a quinoxaline ligand and mercury(II) salts which have then been analyzed using IR spectroscopy and thermal gravimetric (TGA) analysis. Furthermore, these compounds have also been characterized using single-crystal X-ray crystallography. The single-crystal X-ray data of compound 1 shows the complex to be a monomer of mercury(II). The structural studies of compounds 2 and 3 show that these structures are two- and three-dimensional coordination polymers of mercury(II). Under mild reaction conditions, the mentioned compounds exhibited high efficiency and reusability in desulfurization removal of model oil which was prepared by dissolving dibenzothiophene in n-hexane. Furthermore, the DBT removal in the solution obeys first order reaction kinetics and the activation energy of the adsorption process was found to be 16.57 kJ mol−1. Finally, solid state crystal to crystal transformation of these compounds was investigated.

Graphical abstract: Two reversible transformable mercury(ii) coordination polymers as efficient adsorbents for removal of dibenzothiophene

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Supplementary files

Article information


Submitted
30 Jun 2015
Accepted
11 Sep 2015
First published
14 Sep 2015

RSC Adv., 2015,5, 81356-81361
Article type
Paper
Author version available

Two reversible transformable mercury(II) coordination polymers as efficient adsorbents for removal of dibenzothiophene

Y. Hou, M. Y. Masoomi, M. Bagheri, A. Morsali and S. W. Joo, RSC Adv., 2015, 5, 81356
DOI: 10.1039/C5RA12686J

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