A quick and selective rhodamine based “smart probe” for “signal-on” optical detection of Cu2+ and Al3+ in water, cell imaging, computational studies and solid state analysis

Abhishek Rai, Alok Kumar Singh, Kamini Tripathi, Avinash Kumar Sonkar, Brijesh Singh Chauhan, S. Srikrishna, Tony D. James, Lallan Mishra

Research output: Contribution to journalArticle

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Abstract

A novel rhodamine hydrazone 1 has been synthesized by the condensation of rhodamine B hydrazide with allylsalicylaldehyde and has been fully characterized using various physicochemical techniques including single crystal XRD. Probe 1 can detect Cu2+ and Al3+ ions in aqueous media and displays a turn-on response in absorbance with a high degree of selectivity amongst other common interfering analytes. Al3+ ions lead to fluorescence enhancementby the opening of the spirolactum ring resulting in chelation enhanced fluorescence. DFT and TDDFT calculations support the experimental results. The 1-Al3+ ensemble acts as secondary sensor for pyrophosphate anion due to metal ion induced decomplexation resulting in a low detection limit. Probe 1 can be utilized for bio imaging and displays morphological transformations from crystalline to amorphous state with associated color changes due to mechanical switching. In the solid state, probe 1 displays distinct color changes with emission at different wavelengths in particular Al3+ and Hg2+result in a red shift of the CIE-diagram. While the band gap of probe 1can be tuned from 2.08 eV to 1.60 eV.Probe 1 meets many real-world-challenges in that it is prepared using simple synthetic methods, produces fast and distinct response towards multiple-ions, observed by the “naked eye” in solution and on a TLC plate, and can be exploited for binary data storage.
LanguageEnglish
Pages95-105
JournalSensors and Actuators B: Chemical
Volume266
Early online date5 Feb 2018
DOIs
StatusPublished - 1 Aug 2018

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Rhodamines
rhodamine
solid state
Imaging techniques
Water
probes
cells
water
Ions
Fluorescence
binary data
Color
hydrazides
color
Hydrazones
fluorescence
hydrazones
ions
chelation
data storage

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A quick and selective rhodamine based “smart probe” for “signal-on” optical detection of Cu2+ and Al3+ in water, cell imaging, computational studies and solid state analysis. / Rai, Abhishek; Singh, Alok Kumar; Tripathi, Kamini; Sonkar, Avinash Kumar; Chauhan, Brijesh Singh; Srikrishna, S.; James, Tony D.; Mishra, Lallan.

In: Sensors and Actuators B: Chemical, Vol. 266, 01.08.2018, p. 95-105.

Research output: Contribution to journalArticle

Rai, Abhishek ; Singh, Alok Kumar ; Tripathi, Kamini ; Sonkar, Avinash Kumar ; Chauhan, Brijesh Singh ; Srikrishna, S. ; James, Tony D. ; Mishra, Lallan. / A quick and selective rhodamine based “smart probe” for “signal-on” optical detection of Cu2+ and Al3+ in water, cell imaging, computational studies and solid state analysis. In: Sensors and Actuators B: Chemical. 2018 ; Vol. 266. pp. 95-105
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abstract = "A novel rhodamine hydrazone 1 has been synthesized by the condensation of rhodamine B hydrazide with allylsalicylaldehyde and has been fully characterized using various physicochemical techniques including single crystal XRD. Probe 1 can detect Cu2+ and Al3+ ions in aqueous media and displays a turn-on response in absorbance with a high degree of selectivity amongst other common interfering analytes. Al3+ ions lead to fluorescence enhancementby the opening of the spirolactum ring resulting in chelation enhanced fluorescence. DFT and TDDFT calculations support the experimental results. The 1-Al3+ ensemble acts as secondary sensor for pyrophosphate anion due to metal ion induced decomplexation resulting in a low detection limit. Probe 1 can be utilized for bio imaging and displays morphological transformations from crystalline to amorphous state with associated color changes due to mechanical switching. In the solid state, probe 1 displays distinct color changes with emission at different wavelengths in particular Al3+ and Hg2+result in a red shift of the CIE-diagram. While the band gap of probe 1can be tuned from 2.08 eV to 1.60 eV.Probe 1 meets many real-world-challenges in that it is prepared using simple synthetic methods, produces fast and distinct response towards multiple-ions, observed by the “naked eye” in solution and on a TLC plate, and can be exploited for binary data storage.",
author = "Abhishek Rai and Singh, {Alok Kumar} and Kamini Tripathi and Sonkar, {Avinash Kumar} and Chauhan, {Brijesh Singh} and S. Srikrishna and James, {Tony D.} and Lallan Mishra",
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