Supramolecular fullerene/porphyrin interaction in solution : spectroscopic and theoretical investigations

• Main Authors: Partha Mukherjee, Sumanta Bhattacharya
• Format: Article in Journal/Newspaper
• Language: English
• Published: Zenodo 2011
• Subjects: C6o and C7o; octaethylporphyrin; UV-Vis and nuorescence spectroscopic investigations; binding constants; MMMF calculations; DML
• Online Access: https://dx.doi.org/10.5281/zenodo.5764008; https://zenodo.org/record/5764008

Department of Chemistry, The University of Burdwan, Golapbag, Burdwan-713 104, West Bengal, India E-mail: [e-mail] Fax : [phone] Manuscript received 05 October 2010. accepted 30 December 2010 The present paper deals with the study of supramolecular interaction of an octaethyl Zn 11 porphyrin molecule (I) with C 60 and C 70 In toluene medium by means of absorption spectrophotometric and luminescence measurements. Stoichiometry of both the fullerene complexes of 1 is determined to be 1 : 1. Binding affinity of I towards C 60 and C 70 is examined by both UV-Vis spectrophotometric and steady state fluorescence spectroscopic techniques, which reveals relatively large value of binding constant (K) for the c 70 /1 system (~ 23350 dml mol -1 ) in comparison to C 60 /1 system (i.e. ~11455 dm 3 mol -1 ). Quantum chemical calculations at molecular mechanics level offer Insight into the geometric structure of the supramolecules and give formidable support In favour of large value of K for the C 70 /1 system in terms of the heat of formation value of the fullerene/1 complexes.