NDLI: A Ni-based MOF for selective detection and removal of Hg<sup>2+</sup> in aqueous medium: a facile strategy

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A Ni-based MOF for selective detection and removal of Hg²⁺ in aqueous medium: a facile strategy

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Dalton Transactions Vol - 46 Issue - 5

Dalton Transactions Vol - 46 Issue - 4

Dalton Transactions Vol - 46 Issue - 3

Dalton Transactions Vol - 46 Issue - 2

Dalton Transactions Vol -39

Dalton Transactions Vol -0

A Ni-based MOF for selective detection and removal of Hg²⁺ in aqueous medium: a facile strategy

Content Provider	Royal Society of Chemistry (RSC)
Author	Roy, Partha Mondal, John Halder, Shibashis Frontera, Antonio Ortega-Castro, Joaquín
Copyright Year	2017
Abstract	The uncoordinated sulfur atom of the thiocyanato ligand of a 3D metallo-organic framework (MOF), [Ni(3-bpd)2(NCS)2]n (1), where 3-bpd is 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, has been explored for selective visual detection and effective removal of Hg2+ in aqueous medium. [Ni(3-bpd)2(NCS)2]n has been synthesized under ambient conditions and characterized by elemental analysis, FT-IR spectroscopy, UV-vis spectroscopy, FE-SEM and EDX, XPS and X-ray single crystal diffraction analysis. 1 shows two thiocyanato moieties bound to the hexacoordinated metal center with N atoms whereas the sulfur end remains uncoordinated. The strategy for binding and removal of Hg2+ is very simple. Hg2+ is known for its affinity for strong bond formation with the soft center, S. The sulfur atoms form bonds with this heavy metal ion. The color of 1 changes from green to grey as Hg atoms form coordinate bonds with S atoms of the SCN− group. It has been found that Hg is present in grey materials in a 2 : 1 ratio (Hg/Ni). 1 is selective for Hg as other metals/metalloids, including heavy metal ions, present in water are unable to change the color of 1 as they do not form any bond with it. Binding of Hg with the S end of the thiocyanato moiety has been confirmed by a number of techniques, e.g. IR and UV-vis spectra, FESEM, EDX, and XPS. Simple filtration is done to separate grey materials for the removal of Hg2+ ion from the water medium. A theoretical calculation has been performed to rationalize the fact.
Starting Page	1943
Ending Page	1950
Page Count	8
File Format	HTM / HTML PDF
ISSN	14779226
Volume Number	46
Issue Number	6
Journal	Dalton Transactions
DOI	10.1039/c6dt04722j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NCS Sulfur Ligand Three-dimensional space 3-Butadiene Fourier-transform infrared spectroscopy Spectroscopy Ultraviolet\u2013visible spectroscopy X-ray crystallography Neutron diffraction Covalent bond Heavy metals Ion
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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