title: Förster's resonance energy transfer between Fullerene C60 and Coumarin C440.
abstract: The interaction between Coumarin C440 with Fullerene C60 has been studied by fluorescence and time resolved spectroscopic techniques. The Coumarin C440-Fullerene C60 pair shows Forster's resonance energy transfer (FRET) from Coumarin C440 (donor) to Fullerenes C60 (acceptor). The FRET efficiency of this pair increases with the increase of the acceptor concentration. The critical energy transfer distance (R0) at which transfer efficiency is 50% is found to be 34Ǻ. Stern-Volmer plot indicates static as well as dynamic quenching. However, the FRET studies show highest efficiency at the critical stage of dimer formation.
authors.affiliation: Department of Physics, Jamia Millia Islamia, New Delhi 110025, India. darakhshan_qsr@yahoo.com
authors.forename: Darakhshan
authors.initials: D
authors.lastname: Qaiser
authors.forename: Mohd Shahid
authors.initials: MS
authors.lastname: Khan
authors.forename: R D
authors.initials: RD
authors.lastname: Singh
authors.forename: Zahid H
authors.initials: ZH
authors.lastname: Khan
authors.forename: Santa
authors.initials: S
authors.lastname: Chawla
mesh_terms: D003374:Coumarins / Q000737:chemistry*; D019281:Dimerization; D031541:Fluorescence Resonance Energy Transfer / Q000379:methods*; D037741:Fullerenes / Q000737:chemistry*; D008954:Models, Biological; D008958:Models, Molecular; D013050:Spectrometry, Fluorescence
chemical_list: D003374:Coumarins; D037741:Fullerenes; C030123:coumarin; C069837:fullerene C60; C028743:7-amino-4-methylcoumarin