A turn-off fluorescence sensor for cyanide detection which in turn inhibit 2-way ESIPT investigated by experimental and theoretical study

Sohini Basu Roy; Amit Maity; Kajal Krishna Rajak

doi:10.1016/j.inoche.2017.01.009

A turn-off fluorescence sensor for cyanide detection which in turn inhibit 2-way ESIPT investigated by experimental and theoretical study

Sohini Basu Roy, Amit Maity, Kajal Krishna Rajak

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A ligand based on 3-((quinoline-7-yl) methyeleneamino) phenazine-2-ol) (HAPQA) has been designed and synthesized for the selective detection of cyanide ions. The ligand HAPQA exhibits excited-state intramolecular proton transfer (ESIPT) with a long wavelength emission fluorescent (575 nm) which gradually quenches with the addition of cyanide ions. The photophysical properties of the probe as well as its selectivity towards CN⁻ ions are explored using UV–visible, emission spectroscopy and time-resolved fluorescence spectroscopic studies. The ligand exhibits strong H-bonding-mediated inhibition of 2-way excited-state intramolecular proton transfer (ESIPT) in HAPQA selectively with cyanide ions over all other ions. The deep orange colour fluorescence of the ligand in acetonirile turns into bright green coloured solution in presence of cyanide ions with a detection limit of 0.60 μM. DFT calculations has been done to study the ground and excited state energy optimized structure and proposed mechanism which is in harmony with the experimental findings and the ESIPT process observed in ligand HAPQA. Thus, the receptor can be used as a Colorimetric and fluorescent sensor for the determination of CN⁻ ion.

Original language	English
Pages (from-to)	81-86
Number of pages	6
Journal	Inorganic Chemistry Communications
Volume	76
DOIs	https://doi.org/10.1016/j.inoche.2017.01.009
State	Published - 1 Feb 2017
Externally published	Yes

Keywords

CN ions
DFT
ESIPT
H-bonding-mediated inhibition

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.inoche.2017.01.009

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title = "A turn-off fluorescence sensor for cyanide detection which in turn inhibit 2-way ESIPT investigated by experimental and theoretical study",

abstract = "A ligand based on 3-((quinoline-7-yl) methyeleneamino) phenazine-2-ol) (HAPQA) has been designed and synthesized for the selective detection of cyanide ions. The ligand HAPQA exhibits excited-state intramolecular proton transfer (ESIPT) with a long wavelength emission fluorescent (575 nm) which gradually quenches with the addition of cyanide ions. The photophysical properties of the probe as well as its selectivity towards CN− ions are explored using UV–visible, emission spectroscopy and time-resolved fluorescence spectroscopic studies. The ligand exhibits strong H-bonding-mediated inhibition of 2-way excited-state intramolecular proton transfer (ESIPT) in HAPQA selectively with cyanide ions over all other ions. The deep orange colour fluorescence of the ligand in acetonirile turns into bright green coloured solution in presence of cyanide ions with a detection limit of 0.60 μM. DFT calculations has been done to study the ground and excited state energy optimized structure and proposed mechanism which is in harmony with the experimental findings and the ESIPT process observed in ligand HAPQA. Thus, the receptor can be used as a Colorimetric and fluorescent sensor for the determination of CN− ion.",

keywords = "CN ions, DFT, ESIPT, H-bonding-mediated inhibition",

author = "Roy, {Sohini Basu} and Amit Maity and Rajak, {Kajal Krishna}",

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year = "2017",

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doi = "10.1016/j.inoche.2017.01.009",

language = "English",

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AU - Roy, Sohini Basu

AU - Maity, Amit

AU - Rajak, Kajal Krishna

PY - 2017/2/1

Y1 - 2017/2/1

N2 - A ligand based on 3-((quinoline-7-yl) methyeleneamino) phenazine-2-ol) (HAPQA) has been designed and synthesized for the selective detection of cyanide ions. The ligand HAPQA exhibits excited-state intramolecular proton transfer (ESIPT) with a long wavelength emission fluorescent (575 nm) which gradually quenches with the addition of cyanide ions. The photophysical properties of the probe as well as its selectivity towards CN− ions are explored using UV–visible, emission spectroscopy and time-resolved fluorescence spectroscopic studies. The ligand exhibits strong H-bonding-mediated inhibition of 2-way excited-state intramolecular proton transfer (ESIPT) in HAPQA selectively with cyanide ions over all other ions. The deep orange colour fluorescence of the ligand in acetonirile turns into bright green coloured solution in presence of cyanide ions with a detection limit of 0.60 μM. DFT calculations has been done to study the ground and excited state energy optimized structure and proposed mechanism which is in harmony with the experimental findings and the ESIPT process observed in ligand HAPQA. Thus, the receptor can be used as a Colorimetric and fluorescent sensor for the determination of CN− ion.

AB - A ligand based on 3-((quinoline-7-yl) methyeleneamino) phenazine-2-ol) (HAPQA) has been designed and synthesized for the selective detection of cyanide ions. The ligand HAPQA exhibits excited-state intramolecular proton transfer (ESIPT) with a long wavelength emission fluorescent (575 nm) which gradually quenches with the addition of cyanide ions. The photophysical properties of the probe as well as its selectivity towards CN− ions are explored using UV–visible, emission spectroscopy and time-resolved fluorescence spectroscopic studies. The ligand exhibits strong H-bonding-mediated inhibition of 2-way excited-state intramolecular proton transfer (ESIPT) in HAPQA selectively with cyanide ions over all other ions. The deep orange colour fluorescence of the ligand in acetonirile turns into bright green coloured solution in presence of cyanide ions with a detection limit of 0.60 μM. DFT calculations has been done to study the ground and excited state energy optimized structure and proposed mechanism which is in harmony with the experimental findings and the ESIPT process observed in ligand HAPQA. Thus, the receptor can be used as a Colorimetric and fluorescent sensor for the determination of CN− ion.

KW - CN ions

KW - DFT

KW - ESIPT

KW - H-bonding-mediated inhibition

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DO - 10.1016/j.inoche.2017.01.009

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JO - Inorganic Chemistry Communications

JF - Inorganic Chemistry Communications

ER -

A turn-off fluorescence sensor for cyanide detection which in turn inhibit 2-way ESIPT investigated by experimental and theoretical study

Abstract

Keywords

ASJC Scopus subject areas

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