{"title":"有机磷对无镁白钨矿形成的影响","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":"{\"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}","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}
EFFECT OF ORGANOPHOSPHATES ON THE FORMATION OF MAGNESIUM-FREE WHITLOCKITE
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)
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