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Photophysical Investigations on Determination of Molecular Structure and Binding Strength of Supramolecular Complexation Between Fulleropyrrolidine and a Designed Bisporphyrin in Solution

Photophysical Investigations on Determination of Molecular Structure and Binding Strength of Supramolecular Complexation Between Fulleropyrrolidine and a Designed Bisporphyrin in Solution

Sibayan Mukherjee, Ajoy K Bauri, Sumanta Bhattacharya

Spectrochim Acta A Mol Biomol Spectrosc. 2013 May 15;109:32-6.

PMID: 23501714

Abstract:

The present article reports, for the first time, the photophysical aspects of non-covalent interaction of a fullerene derivative, namely, C60 pyrrolidine tris-acid ethyl ester (PyC60) with a designed bisporphyrin (1) (having carbazole spacer unit) in toluene. Absorption spectrophotometric studies reveal that decrease in the absorption intensity of the Soret absorption band of 1 takes in presence of PyC60 in the solvent studied. Steady state fluorescence studies reveal efficient quenching of fluorescence intensity of 1 in presence of PyC60. Static quenching model explores a binding constant (KS) value of 2,910 dm(3) mol(-1) in toluene. Time resolved emission study establishes static quenching mechanism for the investigated supramolecule in non-polar solvent. Molecular mechanics calculations in vacuo evoke the single projection structure of the PyC60-1 complex and interpret the geometrical arrangement of both PyC60 and 1 during non-covalent complexation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76134	C60 Pyrrolidine tris-acid ethyl ester			Price

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