European Journal of Chemistry

Study on the host-guest interactions during caffeine encapsulation into zeolite

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Published: Jun 30, 2015
DOI: https://doi.org/10.5155/eurjchem.6.2.169-173.1228
Keywords:
Caffeine, Kinetics, Sorption, Equilibrium, Drug-delivery, Natural zeolite
Section
Research Article
Issue
Vol. 6 No. 2 (2015): June 2015
Dates
Received 2014-11-26
Accepted 2015-01-10
Published 2015-06-30


Main Article Content

Zvezdelina Lyubenova Yaneva
Chemistry Unit, Department of Pharmacology, Animal Physiology and Physiological Chemistry, Faculty of Veterinary Medicine, Trakia University, Students Campus, 6000 Stara Zagora, Bulgaria
Manuela Stoyanova Staleva
University “Prof. d-r Assen Zlatarov”, 1 Prof. Yakim Yakimov Str., 8000 Bourgas, Bulgaria
Nedyalka Valkanova Georgieva
Chemistry Unit, Department of Pharmacology, Animal Physiology and Physiological Chemistry, Faculty of Veterinary Medicine, Trakia University, Students Campus, 6000 Stara Zagora, Bulgaria

Abstract

The objective of this study was to investigate the equilibrium and kinetics behavior, sorption mechanism and host-guest interactions during caffeine (CAF) encapsulation in natural zeolite. The chemical, spectral and morphological properties of the newly obtained drug-carrier system were analyzed. Zeolite surface chemistry and morphology were characterized by determination of pH of zero charge, FT-IR and digital microscopy analyses. Equilibrium and kinetic sorption experiments and modeling were conducted to assess zeolite potential. Satisfactory extend of CAF encapsulation in the zeolite matrix (E 36.4%) was obtained. The probable host-quest interactions include Van der Waals interactions, H-bonds and chemical interactions between CAF functional groups and zeolite silanol groups, as well as parallel intraparticle diffusion of drug molecules in the mesopores of the mineral particles. The analyses of the experimental results indicated that natural zeolite could be successfully applied for encapsulating CAF.


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Yaneva, Z. L.; Staleva, M. S.; Georgieva, N. V. Study on the Host-Guest Interactions During Caffeine Encapsulation into Zeolite. Eur. J. Chem. 2015, 6, 169-173.

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Supporting Agencies

Project No. 4 OUP, Trakia University, Stara Zagora, Bulgaria
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