Tetrahedron Letters

A simple quinoxaline-based highly sensitive colorimetric and ratiometric sensor, selective for nickel and effective in very high dilution

S Goswami, S Chakraborty, S Paul, S Halder…

Index: Goswami, Shyamaprosad; Chakraborty, Shampa; Paul, Sima; Halder, Sandipan; Maity, Annada C. Tetrahedron Letters, 2013 , vol. 54, # 37 p. 5075 - 5077

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Citation Number: 19

Abstract

Abstract A new quinoxaline based receptor (HQNM) has been designed and synthesized which shows a remarkable color change from colorless to yellow on specific binding with nickel. The cation recognition property of the receptor is monitored by the UV–vis and 1 H NMR titrations. It is observed that the receptor shows a specific selectivity toward nickel over other interfering cations. Thus, a significant bathochromic shift in UV–vis spectrum with a ...