abstract
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.
keywords
POLYCYCLIC AROMATIC-HYDROCARBONS; SCHIFF BASE SENSOR; FLUORESCENCE; RECOGNITION; AL3+; DISCRIMINATION; PHOTOPHYSICS; NAPHTHALENE; EXCIMER; URINE
subject category
Biochemistry & Molecular Biology; Biophysics
authors
Ghosh, M; Ta, S; Lohar, S; Das, S; Brandao, P; Felix, V; Das, D
our authors
Paula Cristina Ferreira da Silva Brandão
Assistant Researcher
Vítor Félix
Associate Professor with AggregationGroups
1 - inorganic functional nanomaterials and organic-inorganic hybrids
6 - computer simulation and multiscale modeling
acknowledgements
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.