Spectrophotometric study of the supramolecular complexes of [60]- and [70]Fullerenes with biscalix[6]arene and crown[4]calix[6]arene.
[60]- and [70]Fullerenes have been shown to form 1:1 supramolecular complexes with bis[2-(5,11,17,23,29,35-hexa-tert-butyl-37,38,39,40,41-pentahydroxycalix[6]arenyl-oxy ethyl ether) (1) and 5,11,17,23,29,35-hexa-tert-butyl-37,38,40,41-tetra hydroxyl-39,42-(crown-4)calix[6]arene (2) in CHCl3 medium by electronic absorption spectroscopy. Formation constants (K) of the complexes of [60]- and [70]fullerenes with 1 and 2 have been determined at room temperature from which free energy of formation values of the complexes have been estimated. The very high formation constant value of [60]fullerene/1 complex (5900 dm3 mol-1) in indicative of formation of inclusion complex. Moreover, PM3 calculations reveal that intermolecular interaction between [60]fullerene and 1 proceeds through quite deep energy molecular orbital.
Ghosh
Kalyan
K
Department of Chemistry, The University of Burdwan, Golapbag, Burdwan 713104, India.
Semwal
Abha
A
Nayak
Sandip K
SK
Banerjee
Shrabanti Bhattacharya
SB
Banerjee
Manas
M
D047250:Calixarenes / Q000737:chemistry*; D047248:Crown Compounds / Q000737:chemistry*; D004583:Electrons; D037741:Fullerenes / Q000737:chemistry*; D007700:Kinetics; D008956:Models, Chemical; D013053:Spectrophotometry
D047248:Crown Compounds; D037741:Fullerenes; D047250:Calixarenes