000			01737nab a2200205 4500
005			20260520000817.0
008			260224s2009 xxu
245	0	0	_aAbsorption spectrophotometric study of molecular complexation of asphaltene with bromanil
260			_a _b _cene. 2009
270			_a15/05/2009 ; 17/04/2009
300			_a4 p. ; 392-396
520			_aTranscripción del resúmen publicado por el autor: It has been shown by UV-vis spectrophotometric method that p-bromanil forms inclusion complex of 1:2 stoichiometry with coal-derived asphaltenes. The absorption peak for the complex has been detected by difference spectral method and has been compared with those for complexes involving chloranils. The wavelengths of the maximum absorption are in the expected order of electron affinities of the chloranils and bromanil. The formation constants (K) have been determined using the Benesi-Hildebrand equation. The magnitudes of K are large compared to those of weak charge transfer complexes (for which K ˜ 101 to 103 dm3 mol-1) but are comparable to those of some recently reported supramolecular or inclusion complexes. The study reveals the presence of p-donor (i.e., aromatic) type of groups in asphaltene molecule. It also supports the view that bromanil molecules get included into structures provided by asphaltene molecules. Thermodynamic parameters H0 sand S0 for the complexation process have also been determined.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aGhosh, Ashish Kumar _940938
100	1		_aMukherjee, Asok Kumar _940939
100	1		_aBagchi, Sanjib _940940
999			_c169596 _d169596
856			_uhttp://pubs.acs.org/doi/full/10.1021/ef800746z