title: Physicochemical insights in non-covalent interaction of a newly designed triporphyrin with fullerenes C60 and C70 in solution.
abstract: The present paper reports the synthesis of free-base (H(2)-1) and zinc-triporphyrins Zn-1, and their supramolecular complexes with C(60) and C(70) in toluene. While UV-Vis studies reveal ground state interaction between fullerenes and triporphyrins, steady state fluorescence measurements establish quenching of fluorescence of triporphyrins by fullerenes. Binding constants data evoke that Zn-1 may be employed as an efficient tweezers for C(70) in toluene. Time resolved emission studies establish relatively long-lived charge separated state for the C(70)/triporphyrin complexes. Molecular mechanics force field calculations in vacuo interpret the stability difference between C(60)/and C(70)/complexes of triporphyrin.
authors.affiliation: Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713 104, India.
authors.forename: Basanta K
authors.initials: BK
authors.lastname: Ghosh
authors.forename: Kotni
authors.initials: K
authors.lastname: Santhosh
authors.forename: Ajay K
authors.initials: AK
authors.lastname: Bauri
authors.forename: Sumanta
authors.initials: S
authors.lastname: Bhattacharya
mesh_terms: D055598:Chemical Phenomena; D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D011166:Porphyrins / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013997:Time Factors
chemical_list: D037741:Fullerenes; D011166:Porphyrins; D012996:Solutions; C069836:fullerene C70; C069837:fullerene C60