{"title":"EFFECT OF ORGANOPHOSPHATES ON THE FORMATION OF MAGNESIUM-FREE WHITLOCKITE","authors":"Toshiisa Konishi, Sadayuki Watanabe","doi":"10.3363/prb.37.26","DOIUrl":null,"url":null,"abstract":"Objective of the present study was to synthesize Mg-free whitlockite (WH) particles using organophosphates with different alkyl chain lengths via a solvothermal reaction. The effects of the organophosphates and their Ca/P molar ratio on the formation of WH were investigated. With increasing alkyl chain length of the organophosphate and increasing Ca/P molar ratio, the dominant phase changed from WH to hydroxyapatite (HA). This result suggests that the organophosphates exhibited different hydrolysis rates. With all of the organophosphates, WHs were obtained only at a Ca/P molar ratio of 0.25. In addition, an analysis of the local structure using H and P nuclear magnetic resonance spectroscopy indicated that the WH contained protonated phosphate (HPO4 ) and trace amount of HA subphase. (Received Jul 12, 2021; Accepted Sept 15, 2021)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"39 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Phosphorus Research Bulletin","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3363/prb.37.26","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Objective of the present study was to synthesize Mg-free whitlockite (WH) particles using organophosphates with different alkyl chain lengths via a solvothermal reaction. The effects of the organophosphates and their Ca/P molar ratio on the formation of WH were investigated. With increasing alkyl chain length of the organophosphate and increasing Ca/P molar ratio, the dominant phase changed from WH to hydroxyapatite (HA). This result suggests that the organophosphates exhibited different hydrolysis rates. With all of the organophosphates, WHs were obtained only at a Ca/P molar ratio of 0.25. In addition, an analysis of the local structure using H and P nuclear magnetic resonance spectroscopy indicated that the WH contained protonated phosphate (HPO4 ) and trace amount of HA subphase. (Received Jul 12, 2021; Accepted Sept 15, 2021)
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
