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ATR-FTIR investigation on the complexation of myo-inositol hexaphosphate with aluminum hydroxide.
J Colloid Interface Sci. 2006 Jan 15; 293(2):296-302.JC

Abstract

The adsorption isotherm of and the pH effect on the adsorption of myo-inositol hexaphosphate (myo-IP6) on amorphous aluminum hydroxide was investigated. It was found that the adsorption isotherm of myo-IP6 on aluminum hydroxide could be well fitted with the Freundlich isotherm. The amount of myo-IP6 adsorbed remained almost constant in the range of pH 4.0 to 7.0, but it decreased considerably as the initial pH was over 7. The adsorption of myo-IP6 resulted in an increase in the pH level due to the release of OH(-) ions, which suggested that the adsorption of myo-IP6 on aluminum hydroxide was caused by a ligand exchange reaction. ATR-FTIR analysis of myo-IP6 in solution and adsorbed on aluminum hydroxide at different pH were performed. The ATR-FTIR investigation indicated that myo-IP6 was adsorbed onto aluminum hydroxide by forming inner-sphere complexes and adsorption facilitated the deprotonation of phosphate groups. The asymmetric vibration of the PO bond in AlPO(-)(3) appearing at a lower frequency than that in the terminal HPO(-)(3) indicated that Al bound to the O atom not as strongly as the H atom did. The ATR-FTIR investigation and theoretical calculation (with the Gaussian 03 program) revealed that three of the six phosphate groups in myo-IP6 molecules were bound to aluminum hydroxide while the other three remained free when myo-IP6 was adsorbed on aluminum hydroxide.

Authors+Show Affiliations

Department of Civil Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16111695

Citation

Guan, Xiao-Hong, et al. "ATR-FTIR Investigation On the Complexation of Myo-inositol Hexaphosphate With Aluminum Hydroxide." Journal of Colloid and Interface Science, vol. 293, no. 2, 2006, pp. 296-302.
Guan XH, Shang C, Zhu J, et al. ATR-FTIR investigation on the complexation of myo-inositol hexaphosphate with aluminum hydroxide. J Colloid Interface Sci. 2006;293(2):296-302.
Guan, X. H., Shang, C., Zhu, J., & Chen, G. H. (2006). ATR-FTIR investigation on the complexation of myo-inositol hexaphosphate with aluminum hydroxide. Journal of Colloid and Interface Science, 293(2), 296-302.
Guan XH, et al. ATR-FTIR Investigation On the Complexation of Myo-inositol Hexaphosphate With Aluminum Hydroxide. J Colloid Interface Sci. 2006 Jan 15;293(2):296-302. PubMed PMID: 16111695.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - ATR-FTIR investigation on the complexation of myo-inositol hexaphosphate with aluminum hydroxide. AU - Guan,Xiao-Hong, AU - Shang,Chii, AU - Zhu,Jun, AU - Chen,Guang-Hao, Y1 - 2005/08/19/ PY - 2005/04/14/received PY - 2005/06/18/revised PY - 2005/06/20/accepted PY - 2005/8/23/pubmed PY - 2007/5/26/medline PY - 2005/8/23/entrez SP - 296 EP - 302 JF - Journal of colloid and interface science JO - J Colloid Interface Sci VL - 293 IS - 2 N2 - The adsorption isotherm of and the pH effect on the adsorption of myo-inositol hexaphosphate (myo-IP6) on amorphous aluminum hydroxide was investigated. It was found that the adsorption isotherm of myo-IP6 on aluminum hydroxide could be well fitted with the Freundlich isotherm. The amount of myo-IP6 adsorbed remained almost constant in the range of pH 4.0 to 7.0, but it decreased considerably as the initial pH was over 7. The adsorption of myo-IP6 resulted in an increase in the pH level due to the release of OH(-) ions, which suggested that the adsorption of myo-IP6 on aluminum hydroxide was caused by a ligand exchange reaction. ATR-FTIR analysis of myo-IP6 in solution and adsorbed on aluminum hydroxide at different pH were performed. The ATR-FTIR investigation indicated that myo-IP6 was adsorbed onto aluminum hydroxide by forming inner-sphere complexes and adsorption facilitated the deprotonation of phosphate groups. The asymmetric vibration of the PO bond in AlPO(-)(3) appearing at a lower frequency than that in the terminal HPO(-)(3) indicated that Al bound to the O atom not as strongly as the H atom did. The ATR-FTIR investigation and theoretical calculation (with the Gaussian 03 program) revealed that three of the six phosphate groups in myo-IP6 molecules were bound to aluminum hydroxide while the other three remained free when myo-IP6 was adsorbed on aluminum hydroxide. SN - 0021-9797 UR - https://www.unboundmedicine.com/medline/citation/16111695/ATR_FTIR_investigation_on_the_complexation_of_myo_inositol_hexaphosphate_with_aluminum_hydroxide_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(05)00730-7 DB - PRIME DP - Unbound Medicine ER -