Duong Quoc Hoan, Ngo Tuan Cuong, Nguyen Thi Ha Vy, Mai Phuong Chi, Nguyen Huu Thinh, Nguyen Trung Hieu, Le Phuong Thao, Nguyen Thi Ngoc Vinh, Le Thi Hong Hai
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引用次数: 0
Abstract
A novel benzo[d]thiazole derivative (B31) was synthesized via a green method. Aggregation-induced emission (AIE) behavior was investigated in a dimethyl sulfoxide (DMSO)/water mixture. The solution of B31 exhibited fluorescence emission at approximately 500 nm with maximum intensity observed at 40% water content. B31 functioned as a selective fluorescence chemosensor for Al3+ ion with detection limit of 24 nM. In addition, a new complex [Al(B31-2H)(NO3)] (AlB31) was prepared and characterized by electrospray ionization mass spectrometry (ESI-MS), infrared spectroscopy (IR), and proton nuclear magnetic resonance spectroscopy (1H NMR) spectra. Notably, the quantum yields of AlB31 complex in DMSO was approximately 60-foldhigher than that of the free B31 ligand, accompanied a significant Stokes shift. Density functional theory (DFT) calculations were performed to rationalize the optical properties of the studied compounds. The weak fluorescence of B31 is likely caused by the rotation of the naphthalene ring around the -CH = N- bond in the S1 excited state. A plausible photoemission mechanism for the AlB31 complex has also been proposed.
期刊介绍:
Journal of Fluorescence is an international forum for the publication of peer-reviewed original articles that advance the practice of this established spectroscopic technique. Topics covered include advances in theory/and or data analysis, studies of the photophysics of aromatic molecules, solvent, and environmental effects, development of stationary or time-resolved measurements, advances in fluorescence microscopy, imaging, photobleaching/recovery measurements, and/or phosphorescence for studies of cell biology, chemical biology and the advanced uses of fluorescence in flow cytometry/analysis, immunology, high throughput screening/drug discovery, DNA sequencing/arrays, genomics and proteomics. Typical applications might include studies of macromolecular dynamics and conformation, intracellular chemistry, and gene expression. The journal also publishes papers that describe the synthesis and characterization of new fluorophores, particularly those displaying unique sensitivities and/or optical properties. In addition to original articles, the Journal also publishes reviews, rapid communications, short communications, letters to the editor, topical news articles, and technical and design notes.