Phase transformation of calcium phenyl phosphate in calcium hydroxyapatite

Tanaka, Hidekazu; Ibaraki, Koshiro; Uemura, Masuji; Hino, Ryozi; Kandori, Kazuhiko; Ishikawa, Tatsuo

doi:10.1016/j.materresbull.2006.10.003

Cited by 11 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5 -7] Organic phosphates are constituents of cell walls, nucleotides and adenosine triphosphates (ATPs). [6,8] Phosphate groups are present in proteins, nucleic acid and other biomolecular systems and appear to fulfill the different roles in molecular biology and the living world. [9,10] Phenyl phosphate has been used as the acid phosphatase substrate for about 50 years.…”

Section: Introductionmentioning

confidence: 99%

Vibrational spectroscopic studies and ab initio calculations of phenyl phosphate disodium salt

Anto¹,

Anto²,

Varghese³

et al. 2009

J Raman Spectroscopy

View full text Add to dashboard Cite

The Fourier-transform infrared and Fourier-tranform Raman spectra of phenyl phosphate disodium salt were recorded and analyzed. The surface-enhanced Raman scattering (SERS) spectrum was recorded in a silver colloid. The vibrational wavenumbers of the compound were computed using the Hartree-Fock/6-31G * basis and compared with the experimental values. The molecule is adsorbed on the silver surface with the benzene ring in a tilted orientation. The presence of the phenyl ring and the phosphate group vibrations in the SERS spectrum reveal the interactions between the phenyl ring and the phosphate group with the silver surface. The first hyperpolarizability is calculated, and the calculated molecular geometry is compared with those of similar reported structures.

show abstract

Section: Introductionmentioning

confidence: 99%

Vibrational spectroscopic studies and ab initio calculations of phenyl phosphate disodium salt

Anto¹,

Anto²,

Varghese³

et al. 2009

J Raman Spectroscopy

View full text Add to dashboard Cite

show abstract

“…There are many studies reported about the interaction by Bottari and Porto [3], Suga and Okabe [4], Lebugle and co-workers [5][6][7], Ozin et al [8], Kandori et al [9] and our group [10][11][12]. However, influence of hydrolysis of organic phosphates on the formation of CaHap has not been fully discussed except for our studies [13,14]. Clarifying this subject would give us a useful information about formation mechanism of hard tissues in vivo.…”

Section: Introductionmentioning

confidence: 67%

“…To elucidate this, simple organic phosphates such as phenyl phosphate (C 6 H 5 PO 4 H 2 : PP) are adequate because it is easily hydrolyzed in aqueous media by controlling the solution pH [15,16]. Recently, the author reported the synthesis of CaHap by hydrolyzing the PP in aqueous Ca(OH) 2 solution at 85°C and at body temperature of 37°C in the presence of ALP [13,14].…”

Section: Introductionmentioning

confidence: 99%

Influence of Strontium (Ii) on the Formation of Calcium Hydroxyapatite Prepared by Hydrolyzing Phenyl Phosphate Using Alkaline Phosphatase at 37°c

Tanaka

Nishimoto

2011

Phosphorus Research Bulletin

Self Cite

View full text Add to dashboard Cite

Influence of Sr 2+ on the formation and structure of calcium hydroxyapatite (Ca 10 (PO 4) 6 (OH) 2 : CaHap) particles prepared by hydrolyzing the phenyl phosphate (C 6 H 5 PO 4 H 2) using alkaline phosphatase (ALP) at 37°C was examined. Increasing the additional amount of Sr 2+ increased the Sr content in the products and turned the crystal phase of the products as follow: CaHap  solid solution SrCaHap  Sr 1.7 Ca 1.3 (PO 4) 2  (3Sr(HPO 4) 2 •Sr 3 (PO 4) 2)•2H 2 O. All the phenyl phosphates were hydrolyzed by ALP at 37°C. The crystallinity and particle size of CaHap decreased with an increase of added Sr 2+ , meaning the inhibition of crystallization and particle growth. These facts suppose that incorporation of Sr 2+ in animal organism suppresses the formation of hard tissues.

show abstract

“…At a pH less than or equal to 8.0, the diffraction peaks of calcium phenylphosphate (CaPP) become weaker and completely disappear at pH 7.0. The appearance and intensity of peaks associated with HAP increase as the pH of the solution decreases [8].…”

Section: Effect Of Phmentioning

confidence: 97%

“…Parameters such as temperature, pH, reaction time and precursors may be adjusted so that the ratio of Ca/P varies between 1.5 and 1.67 [2,[8][9][10][11][12]. The temperature and drying time of the precipitate may be equally important.…”

Section: Hap Synthesismentioning

confidence: 99%

Design and Synthesis of Hydroxyapatite with Organic Modifiers for Application to Environmental Remediation

Daniels

Alexandratos

2010

Waste Biomass Valor

View full text Add to dashboard Cite

Composites of hydroxyapatite (HAP) and organic compounds have been prepared for biomedical applications. These same composites may be applicable to environmental remediation. The organic compounds used for modification include organic acids, calcium chelating agents, proteins, compounds capable of ring-opening polymerization, and hydrophobic silicon-containing molecules. The methods for modification that have been studied are co-precipitation and post-HAP particle formation. It is proposed that modified-HAP (mHAP) could have enhanced metal ion selectivities. The techniques used to synthesize mHAP are reviewed.

show abstract

Phase transformation of calcium phenyl phosphate in calcium hydroxyapatite

Cited by 11 publications

References 15 publications

Vibrational spectroscopic studies and ab initio calculations of phenyl phosphate disodium salt

Vibrational spectroscopic studies and ab initio calculations of phenyl phosphate disodium salt

Influence of Strontium (Ii) on the Formation of Calcium Hydroxyapatite Prepared by Hydrolyzing Phenyl Phosphate Using Alkaline Phosphatase at 37°c

Design and Synthesis of Hydroxyapatite with Organic Modifiers for Application to Environmental Remediation

Contact Info

Product

Resources

About