title: A Phenanthraquinone Based Fluorescent Probe for Sequential Detection of Cu2+and SO32.
abstract: Herein we report the selective detection of Cu2+and SO32-by phenanthraquinone thiosemicarbazone (PQTSC) chemosensor. The chemosensor is efficient in detecting Cu2+over other metal ions, while the PQTSC-Cu2+complex selectively sense SO32-over other anions. On addition of Cu2+to the receptor solution, quenching of emission intensity is observed by 16 folds and upon gradual addition of SO32-to this solution, the emission intensity increases and the maxima is regained. The limit of detection for Cu2+detection calculated from fluorescence titration is 1.06 × 10-8M and the association constant of PQTSC with Cu2+is found to be 2.18 × 105.
authors: Department of Chemistry, Jadavpur University, Kolkata, -700032, India.
authors: Saswati
authors: S
authors: Gharami
authors: Department of Chemistry, Jadavpur University, Kolkata, -700032, India.
authors: Deblina
authors: D
authors: Sarkar
authors: Department of Chemistry, Jadavpur University, Kolkata, -700032, India.
authors: Samik
authors: S
authors: Acharyya
authors: Department of Chemistry, Jadavpur University, Kolkata, -700032, India. tkmondal@chemistry.jdvu.ac.in.
authors: Tapan Kumar
authors: TK
authors: Mondal
keywords: Chemosensor; Copper sensor; Fluorescent turn-off sensor; Phenanthraquinone thiosemicarbazone (PQTSC)