01737nab a2200205 4500 20260520000817.0 260224s2009 xxu Absorption spectrophotometric study of molecular complexation of asphaltene with bromanil ene. 2009 15/05/2009 ; 17/04/2009 4 p. ; 392-396 Transcripción 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. Energy & fuels 23 ARTICULO Ghosh, Ashish Kumar 40938 Mukherjee, Asok Kumar 40939 Bagchi, Sanjib 40940 169596 169596 http://pubs.acs.org/doi/full/10.1021/ef800746z 0 0 0 0 237415 BVIAPG BVIAPG 2026-03-05 200044399 0 200044399 2026-03-05 15:11:49 2026-03-05 ARTICULO