On/Off Fluorescent Chemosensor for Selective Detection of Divalent Iron and Copper Ions: Molecular Logic Operation and Protein Binding

被引：76

作者：

Selvan, G. Tamil ^{[1
]}

Varadaraju, Chitra ^{[1
]}

Selvan, R. Tamil ^{[1
]}

Enoch, Israel V. M. V. ^{[1
]}

Selvakumar, P. Mosae ^{[1
]}

机构：

[1] Karunya Inst Technol & Sci, Chem Res Lab, Coimbatore 641114, Tamil Nadu, India

来源：

ACS OMEGA | 2018年 / 3卷 / 07期

关键词：

COLORIMETRIC SENSOR; ON FLUORESCENT; AQUEOUS-MEDIA; CU2+; COMPLEXES; RECEPTORS; BEHAVIOR; LIGANDS; DESIGN; SITES;

D O I：

10.1021/acsomega.8b00748

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Here, naphthalene diamine-based beta-diketone derivative (compound LH) was successfully used as a dual signaling probe for divalent cations, Fe2+ and Cu2+ ions, in bimodal methods (colorimetric and fluorometric). It showed fluorescent enhancement for Fe2+ ion by photoinduced electron transfer mechanism and fluorescence quenching for Cu2+ ion by charge-transfer process. Binding stoichiometry for [LH-(Fe2+)(2)] and [LH-(Cu2+)(2)] was found to be 1:2 by Job's plot method and, the binding constants were calculated as 1.6638 x 10(10) and 9.22929 x 10(8) M-1, respectively. Compound LH exhibited OR and XOR logic gate behavior with H+, Fe2+, and Cu2+ as inputs. Further, the compound LH and bovine serum albumin binding interaction showed quenching of fluorescence by Forster resonance energy-transfer mechanism.

引用

页码：7985 / 7992

页数：8

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