Spectrophotometric and spectrofluorimetric studies on the selective sensing of fluoride ions by Co(II) and Ni(II) complexes of naphthoquinone derivative possessing enhanced H-bonding property

被引：24

作者：

Madhupriya, Selvaraj ^{[1
]}

Elango, Kuppanagounder P. ^{[1
]}

机构：

[1] Deemed Univ, Gandhigram Rural Inst, Dept Chem, Gandhigram 624302, India

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2012年 / 97卷

关键词：

Chemosensor; Fluoride ions; Colorimetry; Charge transfer; Complexes; RECEPTORS; THIOUREA; ANIONS; RECOGNITION; CHEMOSENSOR; EFFICIENT; UREA;

D O I：

10.1016/j.saa.2012.06.020

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A novel colorimetric chemosensor based on aminonaphthoquinone (L) bearing an N-H receptor unit directly attached to quinone signaling unit has been designed, synthesized and demonstrated. The ligand showed a highly selective colorimetric response to fluoride ions based on H-bond formation with the receptor unit. The binding constants of the L and its square planar [Co(L)Cl-2]center dot 3H(2)O and [Ni(L)Cl-2]center dot 4H(2)O complexes, computed using fluorescent enhancement data, were found to be 0.6, 1.5 and 0.9 x 10(8) M-1, respectively, indicating enhancement of H-bond donor ability of the receptor unit, as a result of complexation with metal ions, towards fluoride ion sensing. Also, these sensors had high selectivity for fluoride ion detection over other common anions, such as Cl-, Br-, I-, AcO-, NO3-, H2PO4- and CN- in acetonitrile. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：429 / 434

页数：6

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