Ghosh, Ashish K. (2005) Spectrophotometric study of molecular complex formation of asphaltene with two isomeric chloranils. Fuel, 84 (2-3). pp. 153-157. ISSN 0016-2361

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Abstract

Coal derived asphaltene has been observed spectrophotometrically to form molecular complexes of charge transfer type with o- and pchloranils. The CT absorption peaks have been detected by difference spectral method and the wavelengths of the CT peaks are in the expected order of electron affinities of the chloranils. 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 Kz101–103 dm3 molK1) 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 compounds in asphaltene molecule. It also supports the view that asphaltene molecules exist in solution forming micellar aggregate, in the cavities of which the chloranil molecules are included.

Item Type:	Article
Uncontrolled Keywords:	Asphaltene; Formation constant; Charge transfer complex
Subjects:	Fuel Scinece
Divisions:	UNSPECIFIED
Depositing User:	Dr. Satyendra Kumar Singh
Date Deposited:	09 Jan 2012 11:50
Last Modified:	09 Jan 2012 11:50
URI:	http://cimfr.csircentral.net/id/eprint/624

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