NDLI: A hetero-bimetallic(Cu–Ru) chromogenic and fluorogenic complex as receptor of soft metal ions

Content Provider	Springer Nature Link
Author	Dixit, Namrata Shahid, Mohammad Misra, Arvind Mishra, Lallan
Copyright Year	2012
Abstract	A hetero-bimetallic complex of type [Cu(bpy)(NCS)(μ-NCS)Ru(bpy)$_{2}$Cl]·PF$_{6}$ is synthesized and characterized using spectroscopic studies, elemental analyses and ESI-MS data. Owing to the presence of sulphur donor ligand in the complex, its affinity towards soft metal ions is monitored. It detects selectively Hg$^{2+}$ and Ag$^{+}$ ions over a number of environmentally relevant cations including Mn$^{2+}$, Pb$^{2+}$, Zn$^{2+}$, Cd$^{2+}$, Ni$^{2+}$, Cu$^{2+}$, and Co$^{2+}$. The naked eye response is more pronounced for Hg$^{2+}$ as compared to Ag$^{+}$ ions. The detection limit for Hg$^{2+}$ ions is 1.0 ppm while for Ag$^{+}$ ions are 10 ppm. However, fluorescence response is exclusive to Ag$^{+}$ ions. The complex shows a tenfold enhancement in the fluorescence intensity upon addition of Ag$^{+}$ ions while no change in emission intensity is observed upon addition of other cations including Hg$^{2+}$. Competitive binding experiments using fluorescence spectrometry reveal that the complex binds Ag$^{+}$ selectively even in presence of tenfold excess of other cations exclusive of Hg$^{2+}$ ions. The emission from the complex obtained by addition of Ag$^{+}$ ions is quenched upon addition of Hg$^{2+}$ ions, displaying fluorescence on–off behavior.
Starting Page	125
Ending Page	132
Page Count	8
File Format	PDF
ISSN	09230750
Journal	Journal of Inclusion Phenomena and Macrocyclic Chemistry
Volume Number	76
Issue Number	1-2
e-ISSN	15731111
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-06-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Heterobimetallic complex Binding study Soft metal ion Chromogenic response Fluorescence on–off behavior Organic Chemistry Food Science Crystallography
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Food Science

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