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Exploring aggregation-induced emission through tuning of ligand structure for picomolar detection of pyrene
Milan Ghosh1, Sabyasachi Ta1, Sisir Lohar2
1Department of Chemistry, The University of Burdwan, Bardhaman, India.
Abstract:
Tuning of ligand structures through controlled variation of ring number in fused-ring aromatic moiety appended to antipyrine allows detection of 7.8 × 10-12 M pyrene via aggregation-induced emission (AIE) associated with 101-fold fluorescence enhancement. In one case, antipyrine unit is replaced by pyridine to derive bis-methylanthracenyl picolyl amine. The structures of four molecules have been confirmed by single crystal X-ray diffraction analysis. Among them, pyrene-antipyrine conjugate (L) undergoes pyrene triggered inhibition of photo-induced electron transfer (PET) leading to water-assisted AIE.
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