A differentially selective sensor with fluorescence turn-on response to Zn2+ and dual-mode ratiometric response to
Debabrata Maity1, T Govindaraju
1Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bangalore-560064, India.
Chemical Communications (Cambridge, England)
|December 8, 2011
Abstract:
A novel quinoline-coumarin (QC) fluoroionophore conjugated by means of a triazolyl-pyrrolidinyl linker exhibits differential dual selectivity for Zn(2+) and Al(3+) in mixed media. QC acts as a turn on fluorescence sensor for Zn(2+) while exhibiting overall ratiometric selectivity for Al(3+) in aqueous media. Moreover, QC exhibited preferential second mode of selectivity for Al(3+) as it ratiometrically displaces Zn(2+) from the [QC + Zn(2+)] complex.
