Photophysical investigations on non-covalently linked fullerene/tetraarylporphyrin supramolecular complexes.
The host-guest interactions of various tetraarylporphyrins (TP), viz., 5,10,15,20-tetraphenyl-21H,23H-porphyrin (1), 5,10,15,20-tetrakis(octadecyloxyphenyl)-21H,23H-porphyrin (2) and 5,10,15,20-tetrakis(dodecyloxyphenyl)-21H,23H-porphyrin (3) with C60 and C70 have been studied by 1H NMR, UV-vis and fluorescence spectroscopic techniques in toluene medium. All the fullerene/porphyrin complexes are found to be stable with 1:1 stoichiometry. Binding constants (K) of all the fullerene/porphyrin complexes have been determined by fluorescence quenching experiment. The trend in K values revealed that the presence of long chain n-alkyl group in tetraarylporphyrin effectively and remarkably increases the selectivity ratio of C70 over C60. Theoretical calculations have extended a good support in interpreting the stability difference between various fullerene/TP complexes.
Bhattacharya
Sumanta
S
Department of Chemistry, The University of Burdwan, Golapbag, Burdwan, India. sum_9974@rediffmail.com
Chattopadhyay
Subrata
S
Nayak
Sandip K
SK
Bhattacharya Banerjee
Shrabanti
S
Banerjee
Manas
M
D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D008027:Light; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D011166:Porphyrins / Q000737:chemistry*; D011522:Protons; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D014050:Toluene / Q000737:chemistry
D037741:Fullerenes; D011166:Porphyrins; D011522:Protons; D014050:Toluene