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A vibrational spectroscopic study of the adsorption of 4,4′-bipyridyl by sepiolite and smectite group clay minerals from Anatolia (Turkey).

Akyüz, Sevim and Akyüz, Tanil and Davies, J. Eric D. (1993) A vibrational spectroscopic study of the adsorption of 4,4′-bipyridyl by sepiolite and smectite group clay minerals from Anatolia (Turkey). Journal of Inclusion Phenomena and Macrocyclic Chemistry, 15 (2). pp. 105-119. ISSN 0923-0750

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Abstract

The adsorption of 4,4-bipyridyl by natural sepiolite and smectite group clay minerals (bentonite, hectorite and saponite) from Anatolia (Turkey) has been studied using vibrational spectroscopy. Investigation of Fourier-transform infrared and Fourier-transform Raman spectra of adsorbed 4,4-bipyridyl indicate the presence of chemisorbed species. However, any evidence for the generation of anionic species on the surface of the phyllosilicates has not been detected. It is proposed that the adsorbed bipyridyl molecules on sepiolite are centrosymmetric and H-bonded to the surface hydroxyls through both the nitrogen lone pairs as bidentate ligands. The adsorbed bipyridyl molecules on the smectite group clays are coordinated to exchangeable cations both directly and also indirectly through water as monodentate ligands. XRD patterns of the clays studied are also recorded.

Item Type: Article
Journal or Publication Title: Journal of Inclusion Phenomena and Macrocyclic Chemistry
Uncontrolled Keywords: FT-IR spectroscopy - FT-Raman spectroscopy - clays - sepiolite - bentonite - hectorite - saponite - 4 ; 4-bipyridyl - adsorption - XRD
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: UNSPECIFIED
ID Code: 22567
Deposited By: ep_ss_importer
Deposited On: 23 Jan 2009 11:20
Refereed?: Yes
Published?: Published
Last Modified: 26 Jul 2012 16:02
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/22567

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