Spectroscopic and theoretical insights on fullerene-octaethylporphyrin self assembled non-covalent conjugates studied in solution

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
Partha Mukherjee, S Bhattacharya

Abstract

The present paper highlights the UV-Vis and fluorescence spectroscopic studies on spontaneous non-covalent interaction between a designed monoporphyrin, namely, 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin (1) and fullerenes (C(60) and C(70)) in toluene medium. While UV-Vis studies reveal considerable amount of fullerene/1 interaction in ground state, steady state fluorescence study establishes remarkable quenching of fluorescence intensity of 1 in the presence of fullerenes C(60) and C(70). Stoichiometry of both the fullerene complexes of 1 is determined to be 1:1. The magnitude of average binding constant (K) values for C(70)/1 and C(60)/1 systems is estimated to be 8705 and 3440 dm(3) mol(-1), respectively, which also prove that moderate value of selectivity in binding between C(70) and C(60) complexes of 1 is resulted in our present work. The genetics of the photo-physical characteristics of fullerene/1 complexes get tremendous support from lifetime experiment, which signifies the importance of static quenching phenomenon for our presently investigated supramolecules. Life time experiment yields larger magnitude of charge separated rate constant for the fullerene/1 species in toluene. Theoretical calculations at molecula...Continue Reading

References

Feb 27, 2007·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sumanta BhattacharyaNaoki Komatsu
Mar 6, 2007·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Sumanta BhattacharyaManas Banerjee
May 3, 2011·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Debabrata Pal, Sumanta Bhattacharya
Oct 4, 2011·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Amal HalderSumanta Bhattacharya

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Citations

Sep 4, 2012·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Basanta K GhoshSumanta Bhattacharya
Dec 4, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Khalid Abu KhadraAyat Foudeh

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