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A differentially selective probe for trivalent chemosensor upon single excitation with cell imaging application: A Potential Applications for a Combinatorial logic circuit and memory device.†

Abstract

A new rhodamine 6G-benzylamine based sensor (L1), having only hydrocarbon skeletons in the extended part, has been synthesised and characterised by single crystal X-ray crystallographic study. It exhibits an excellent selective and sensitive recognition of trivalent metal ions M3+ (M= Fe, Al and Cr) over mono and di-valent and other trivalent metal ions. A large enhancement of fluorescence intensity for Fe3+ (41 fold), Al3+ (31 fold) and Cr3+ (26 fold) was observed upon addition of 3.0 equivalent of these metal ions into the probe in H2O/CH3CN (4:1, v/v, pH 7.2) with naked eye detection. The corresponding Kf values were evaluated to be 9.4 x 103 M-1 (Fe3+); 1.34 x 104 M-1(Al3+) and 8.7 x 103 M-1(Cr3+). Quantum yields of L1, [L1—Fe3+] , [L1—Al3+] and [L1—Cr3+] complexes in H2O/CH3CN (4:1, v/v, pH 7.2) are found to be 0.012, 0.489, 0.376, 0.310 respectively using Rhodamine-6G as standard. LOD for Fe3+, Al3+ and Cr3+ were determined by 3σ methods and found to be 1.28, 1.34 and 2.28 μM respectively.Cyanide ion scavanges Fe3+ from [Fe3+-L1] complex and quenches its fluorescence via its ring closed spirolactam form. Advanced level molecular logic devices using different inputs (2 and 4 input) an advanced level logic gates and memory device have been constructed. The large enhancement in fluorescence emission of L1 upon complexation with M3+ metal ions makes the probe suitable for bio-imaging of M3+ (M= Fe, Al and Cr) in the living cells.

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Publication details

The article was received on 25 Aug 2018, accepted on 31 Oct 2018 and first published on 01 Nov 2018


Article type: Paper
DOI: 10.1039/C8PP00381E
Citation: Photochem. Photobiol. Sci., 2018, Accepted Manuscript
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    A differentially selective probe for trivalent chemosensor upon single excitation with cell imaging application: A Potential Applications for a Combinatorial logic circuit and memory device.†

    D. Das, R. Alam, A. Katarkar and A. Mahammad, Photochem. Photobiol. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8PP00381E

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