Synthesis and aldehyde absorption properties of aspartate-octacalcium phosphate inclusion compound

Aoki, Shuntaro C.; Nakahira, Atsushi; Sakamoto, Kiyoko; Yamaguchi, Shunro; Suganuma, Katsuaki

doi:10.1016/j.jpcs.2003.10.030

Cited by 19 publications

(15 citation statements)

References 13 publications

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“…15) However, it is not clear whether DCPD is a suitable starting material for OCP with incorporated dicarboxylate ions other than the succinate ion. Since OCP with incorporated dicarboxylate ions has potential as bone repairing materials and adsorbents based on the previous reports, 16), 17) refinement of the synthetic technique and establishing a novel synthetic route to OCP with incorporated dicarboxylate ions are certainly both worthwhile for the creation of novel materials for these applications.…”

Section: Introductionmentioning

confidence: 99%

Transformation of dicalcium phosphate dihydrate into octacalcium phosphate with incorporated dicarboxylate ions

Yokoi

Goto

Kitaoka

2018

J. Ceram. Soc. Japan

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Octacalcium phosphate (OCP) has a layered structure consisting of apatitic and hydrated layers. The hydrogen phosphate ions in the hydrated layer can be replaced by dicarboxylate ions resulting in the formation of OCP with incorporated dicarboxylate ions. We herein report the transformation behaviour of dicalcium phosphate dihydrate (DCPD), which is used as starting material for the synthesis of OCP in acetic acid (Ace), succinic acid (Suc), suberic acid (Sub), and isophthalic acid (Isp) solutions at a pH of approximately 5.5 at 60°C. We found that DCPD with a small crystal size (specific surface area: 4.9 m 2 •g ¹1) completely transformed into OCP within 1 h in Ace solution, whereas DCPD with a large crystal size (specific surface area: 0.62 m 2 •g ¹1) did not form the OCP phase even when treated for 3 h. OCP incorporating Suc and Isp was formed from DCPD with a small crystal size in solutions of these dicarboxylic acids. On the other hand, Sub was not incorporated into OCP although Sub is a typical dicarboxylic acid that could be incorporated into the OCP structure. We concluded that although the dicarboxylic acids that are adaptable to these experimental conditions are limited, DCPD can be used as a starting material for OCP with incorporated dicarboxylate ions.

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Section: Introductionmentioning

confidence: 99%

Transformation of dicalcium phosphate dihydrate into octacalcium phosphate with incorporated dicarboxylate ions

Yokoi

Goto

Kitaoka

2018

J. Ceram. Soc. Japan

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“…Subsequently, various dicarboxylate ions were similarly incorporated into the OCP crystal structure [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ] to enable precise control of the interlayer structure of OCP at the molecular level. OCP is the only compound in the family of calcium orthophosphates that exhibits this incorporation phenomenon, resulting in the formation of functional materials that are widely used as novel bone-repairing materials [ 11 ], aldehyde-specific adsorbents [ 12 ], and electrode materials for supercapacitors [ 13 ]. Consequently, the aforementioned phenomenon has garnered considerable attention from material scientists.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Steric Structures of Dicarboxylate Ions Incorporated in Octacalcium Phosphate Crystals

Yokoi

Kawashita

2021

Materials

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Octacalcium phosphate (OCP) can incorporate various dicarboxylate ions in the interlayer spaces of its layered structure. Although not proven, these incorporated ions are believed to have a linear structure. In this study, the steric structures of twelve different dicarboxylate ions incorporated into OCP were investigated by comparing the experimentally determined interlayer distance of the OCP with the distance estimated using the molecular sizes of dicarboxylic acids calculated by considering their steric structures. The results revealed that the incorporated succinate, glutarate, adipate, pimelate, suberate, and aspartate ions possessed linear structures, whereas the incorporated azelate, sebacate, methylsuccinate, and malate ions exhibited bent structures. Further, the incorporated mercaptosuccinate ions featured linear, bent, other types of structures. Moreover, the steric structure of the incorporated malonate ion significantly differed from those of other dicarboxylate ions. The computational approach employed in this study is expected to deepen our understanding of the steric structures of dicarboxylate ions incorporated in the OCP interlayer spaces.

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“…For example, Aoki et al reported a specific adsorption of an aldehyde for OCPC with aspartate ion. 10) Several methods for the synthesis of OCPCs have been reported. Typically, OCPC is synthesized by the hydrolysis of ¡-TCP in a dicarboxylic acid solution.…”

Section: Introductionmentioning

confidence: 99%

Formation of organically modified octacalcium phosphate in solutions containing various amounts of benzenedicarboxylic acids

Yokoi

Kamitakahara

Kawashita

et al. 2013

J. Ceram. Soc. Japan

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Synthesis and aldehyde absorption properties of aspartate-octacalcium phosphate inclusion compound

Cited by 19 publications

References 13 publications

Transformation of dicalcium phosphate dihydrate into octacalcium phosphate with incorporated dicarboxylate ions

Transformation of dicalcium phosphate dihydrate into octacalcium phosphate with incorporated dicarboxylate ions

Understanding the Steric Structures of Dicarboxylate Ions Incorporated in Octacalcium Phosphate Crystals

Formation of organically modified octacalcium phosphate in solutions containing various amounts of benzenedicarboxylic acids

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