Exploring aggregation-induced emission through tuning of ligand structure for picomolar detection of pyrene

resumo

Tuning of ligand structures through controlled variation of ring number in fused-ring aromatic moiety appended to antipyrine allows detection of 7.8 x 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.

palavras-chave

POLYCYCLIC AROMATIC-HYDROCARBONS; SCHIFF BASE SENSOR; FLUORESCENCE; RECOGNITION; AL3+; DISCRIMINATION; PHOTOPHYSICS; NAPHTHALENE; EXCIMER; URINE

categoria

Biochemistry & Molecular Biology; Biophysics

autores

Ghosh, M; Ta, S; Lohar, S; Das, S; Brandao, P; Felix, V; Das, D

nossos autores

agradecimentos

M.G. sincerely acknowledges CSIR (New Delhi) for fellowship. S.T. and D.D. thank UGC-DAE-Kolkata and Department of Environment, Gov WB for financial assistance.

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