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Chemicals, plastics and rubber industries

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Extrathermodynamic study of surface diffusion in reserved-phase liquid chromatography with silica gels bonded with alkyl ligands of different chain lengths

Article Abstract:

A study highlighting surface diffusion on adsorbents made of silica gels bonded to C1, C4, C8 and C18 alkyl ligands is conducted in reversed-phase liquid chromatography (RPLC) from the viewpoint of two extrathermodynamic relationships. The results reveal that there is an actual enthalpy-entropy compensation (EEC) relationship for surface diffusion in reversed-phase liquid chromatography (RPLC) on silica gels bonded to n-alkyl ligands that have 1-18 carbon atoms.

Author: Miyabe, Kanji, Guiochon, Geroges
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
Chemical properties, Silicon dioxide, Alkyl groups

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Radiation damage of alkoxy and siloxy ligands bonded to silica

Article Abstract:

Electron paramagnetic resonance (EPR) spectroscopy is used for examining the pattern of radiation-induced bond dissociation in alkoxy and siloxy ligands that are bonded to silica. Conclusions indicate that the extensive dissociation of constituent bonds of ligands occurs in the primary process and the dissociation of O-C or O-Si bonds at the surface plays a small role in the degradation of thin films by radiation.

Author: Werst, D.W., Vinokur, E.I.
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2001
Electric properties, Chemical bonds, Dissociation, Dissociation reactions

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Hydrogen atom addition to hydrocarbon guests in radiolyzed zeolites

Article Abstract:

A new study explores the main mechanism for radiolysis of hydrocarbons in the zeolite ZSM5.

Author: Werst, D.W., Vinokur, E.I., Han, P., Trifunac, A.D., Choure, S.C., Xu, L., Eriksson, L.A.
Publisher: American Chemical Society
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
Case studies, Photochemical research, Radiation chemistry, Zeolites

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Subjects list: Research, Silica, Ligands, Ligands (Chemistry)
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