: Novel violet pigments were synthesized from manganese oxide and phosphoric acid by heating at several temperatures. The obtained materials were investigated by X-ray diffraction analysis (XRD), infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet–visible reflectance spectroscopy, and L*a*b* color space. Samples synthesized in this study did not show the XRD peak pattern for certain compounds. At P/Mn = 2/3 and 1/1, samples heated at 500 °C showed high a* value and low b* value, corresponding to violet color. On the other hand, at P/Mn = 2/1, the sample heated at 400 °C had the most violet powder.
{"title":"SYNTHESIS OF NOVEL MANGANESE PHOSPHATE VIOLET PIGMENT","authors":"H. Onoda, S. Kanai","doi":"10.3363/prb.36.23","DOIUrl":"https://doi.org/10.3363/prb.36.23","url":null,"abstract":": Novel violet pigments were synthesized from manganese oxide and phosphoric acid by heating at several temperatures. The obtained materials were investigated by X-ray diffraction analysis (XRD), infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet–visible reflectance spectroscopy, and L*a*b* color space. Samples synthesized in this study did not show the XRD peak pattern for certain compounds. At P/Mn = 2/3 and 1/1, samples heated at 500 °C showed high a* value and low b* value, corresponding to violet color. On the other hand, at P/Mn = 2/1, the sample heated at 400 °C had the most violet powder.","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"142 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78585987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper reviews the studies achieved by the author and his research group on functional inorganic phosphorus materials, in commemoration of the distinguished contribution award from The Japanese Association of Inorganic Phosphorus Chemistry (JAIPC) in 2019. The focus of the review is on the development both of electrically functionalized hydroxyapatite and new Na conduction ceramics and glass-ceramics. It is therefore to be stated here that the present review clearly differs from conventional journal-reviews which summarize related papers and collect their related references with critical comments. (Received Mar 4, 2020; Accepted Mar 11, 2020)
{"title":"DEVELOPMENT OF FUNCTIONAL INORGANIC PHOSPHORUS MATERIALS SCIENCE","authors":"K. Yamashita","doi":"10.3363/PRB.36.1","DOIUrl":"https://doi.org/10.3363/PRB.36.1","url":null,"abstract":"This paper reviews the studies achieved by the author and his research group on functional inorganic phosphorus materials, in commemoration of the distinguished contribution award from The Japanese Association of Inorganic Phosphorus Chemistry (JAIPC) in 2019. The focus of the review is on the development both of electrically functionalized hydroxyapatite and new Na conduction ceramics and glass-ceramics. It is therefore to be stated here that the present review clearly differs from conventional journal-reviews which summarize related papers and collect their related references with critical comments. (Received Mar 4, 2020; Accepted Mar 11, 2020)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85177895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, fundamental experiments on the adsorption behavior of proteins on synthesized magnesium-doped calcium hydroxyapatite particles (MgHap) at various Mg/(Ca + Mg) molar ratios (abbreviated as XMg : 0–0.3) were examined. Rod-like calcium hydroxyapatite particles, with a width of 24 nm and length of 180 nm, were obtained in the absence of Mg (XMg = 0). With the increase in XMg up to 0.10, the width and length of MgHap particles decreased to ~10 and 50 nm, respectively. Agglomerates of small thin particles were obtained at XMg ≥ 0.15. All of the synthesized particles exhibited single phase of calcium hydroxyapatite particles (CaHap). The XMg values for the particles precipitated at XMg ≥ 0.04 were less than those of the corresponding solutions. Hence, almost all of the MgHap particles are deficient in magnesium. We propose that to compensate for the cation deficiency, PO4 3 is incorporated as HPO4 2 and H2PO4 and thus decreases the particle negative charge. In addition, all of the adsorption isotherms of typical acidic and basic proteins such as bovine serum albumin (BSA) and lysozyme (LSZ) were compared. The isotherms obtained from a 1 × 10 mol/dm KCl solution were of the Langmuirian type. The saturated amount of adsorbed BSA (ns ) strongly depended on the particle length rather than on the XMg value. At a particle length of greater than 150 nm, ns BSA values abruptly increased. This result strongly suggests that the effects of the C sites produced on the ac and bc faces are advantageous for BSA adsorption. In other words, the adsorption of BSA on MgHap particles was considerably dependent on the length at a critical value of greater than 150 nm. However, the saturated amount of adsorbed LSZ (ns ) exhibited no remarkable variation with the particle length. (Received Apr 15, 2019; Accepted May 8, 2019)
{"title":"ADSORPTION BEHAVIOR OF PROTEINS ON Mg(II)-DOPED CALCIUM HYDROXYAPATITE PARTICLES AT VARIOUS Mg(II) CONTENTS","authors":"Kandori, Hasegawa, Kashiwara","doi":"10.3363/PRB.35.1","DOIUrl":"https://doi.org/10.3363/PRB.35.1","url":null,"abstract":"In this study, fundamental experiments on the adsorption behavior of proteins on synthesized magnesium-doped calcium hydroxyapatite particles (MgHap) at various Mg/(Ca + Mg) molar ratios (abbreviated as XMg : 0–0.3) were examined. Rod-like calcium hydroxyapatite particles, with a width of 24 nm and length of 180 nm, were obtained in the absence of Mg (XMg = 0). With the increase in XMg up to 0.10, the width and length of MgHap particles decreased to ~10 and 50 nm, respectively. Agglomerates of small thin particles were obtained at XMg ≥ 0.15. All of the synthesized particles exhibited single phase of calcium hydroxyapatite particles (CaHap). The XMg values for the particles precipitated at XMg ≥ 0.04 were less than those of the corresponding solutions. Hence, almost all of the MgHap particles are deficient in magnesium. We propose that to compensate for the cation deficiency, PO4 3 is incorporated as HPO4 2 and H2PO4 and thus decreases the particle negative charge. In addition, all of the adsorption isotherms of typical acidic and basic proteins such as bovine serum albumin (BSA) and lysozyme (LSZ) were compared. The isotherms obtained from a 1 × 10 mol/dm KCl solution were of the Langmuirian type. The saturated amount of adsorbed BSA (ns ) strongly depended on the particle length rather than on the XMg value. At a particle length of greater than 150 nm, ns BSA values abruptly increased. This result strongly suggests that the effects of the C sites produced on the ac and bc faces are advantageous for BSA adsorption. In other words, the adsorption of BSA on MgHap particles was considerably dependent on the length at a critical value of greater than 150 nm. However, the saturated amount of adsorbed LSZ (ns ) exhibited no remarkable variation with the particle length. (Received Apr 15, 2019; Accepted May 8, 2019)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76872429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Akira Ito, Y. Otsuka, Masaki Takeuchi, Hideji Tanaka
: Zinc chloroapatite (ZnClAp), a promising material for bone treatment, was synthesized by a mechanochemical method. The effect of synthesis condition on its crystallinity was investigated. Starting materials (i.e., calcium monohydrogen phosphate dihydrate, calcium oxide, zinc oxide and calcium chloride) were kneaded with water at four kinds of water/solid ratios in a planetary ball-mill. Thus obtained products were analyzed by a powder X-ray diffractometry (PXRD) and an attenuated total reflection - infrared (ATR-IR) spectroscopy. The PXRD and ATR-IR results indicate that ZnClAp has successfully been synthesized by the present method. PXRD results indicate that the crystallinity of ZnClAp increases with the water/solid ratio of the kneaded paste for the synthesis. This finding is supported by a principal component analysis (PCA) that is applied to the ATR-IR spectra. The present mechanochemical method is simple, economy, and is useful for the synthesis of ZnClAp.
{"title":"MECHANOCHEMICAL SYNTHESIS OF ZINC CHLOROAPATITE AND EVALUATION OF ITS CRYSTALLINITY BY ATTENUATED TOTAL REFLECTION - INFRARED SPECTROSCOPY AND PRINCIPAL COMPONENT ANALYSIS","authors":"Akira Ito, Y. Otsuka, Masaki Takeuchi, Hideji Tanaka","doi":"10.3363/PRB.35.16","DOIUrl":"https://doi.org/10.3363/PRB.35.16","url":null,"abstract":": Zinc chloroapatite (ZnClAp), a promising material for bone treatment, was synthesized by a mechanochemical method. The effect of synthesis condition on its crystallinity was investigated. Starting materials (i.e., calcium monohydrogen phosphate dihydrate, calcium oxide, zinc oxide and calcium chloride) were kneaded with water at four kinds of water/solid ratios in a planetary ball-mill. Thus obtained products were analyzed by a powder X-ray diffractometry (PXRD) and an attenuated total reflection - infrared (ATR-IR) spectroscopy. The PXRD and ATR-IR results indicate that ZnClAp has successfully been synthesized by the present method. PXRD results indicate that the crystallinity of ZnClAp increases with the water/solid ratio of the kneaded paste for the synthesis. This finding is supported by a principal component analysis (PCA) that is applied to the ATR-IR spectra. The present mechanochemical method is simple, economy, and is useful for the synthesis of ZnClAp.","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90345180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We analyzed the electrical properties of human bone in comparison with the electrically polarized and nonpolarized bone specimens and discussed the role of an organic and inorganic matrix of bone in bone piezoelectricity. Femoral neck bone was scanned to evaluate the cancellous bone structures using micro-computed tomography, and we quantified the carbonic acid by attenuated total reflection spectra to estimate carbonate apatite. The stored electrical charge in the electrically polarized and nonpolarized bone specimens were calculated using thermally stimulated depolarized current (TSDC) measurements. Each TSDC curve had 3 peaks at 100°C, 300°C and 500°C, which may be attributed to collagen, carbonate apatite and hydroxyapatite, respectively. It is suggested that organic substances are more effectively electrically polarized than apatite minerals and that the stored charge in bone may be affected by total bone mass and bone quality, including 3-dimensional structure and structural composition. (Received Jun 30, 2019; Accepted Jul 25,2019)
{"title":"ELECTRICAL PROPERTIES OF HUMAN BONE AS AN ELECTRET","authors":"S. Itoh, K. Yamashita","doi":"10.3363/prb.35.38","DOIUrl":"https://doi.org/10.3363/prb.35.38","url":null,"abstract":"We analyzed the electrical properties of human bone in comparison with the electrically polarized and nonpolarized bone specimens and discussed the role of an organic and inorganic matrix of bone in bone piezoelectricity. Femoral neck bone was scanned to evaluate the cancellous bone structures using micro-computed tomography, and we quantified the carbonic acid by attenuated total reflection spectra to estimate carbonate apatite. The stored electrical charge in the electrically polarized and nonpolarized bone specimens were calculated using thermally stimulated depolarized current (TSDC) measurements. Each TSDC curve had 3 peaks at 100°C, 300°C and 500°C, which may be attributed to collagen, carbonate apatite and hydroxyapatite, respectively. It is suggested that organic substances are more effectively electrically polarized than apatite minerals and that the stored charge in bone may be affected by total bone mass and bone quality, including 3-dimensional structure and structural composition. (Received Jun 30, 2019; Accepted Jul 25,2019)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77181037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper reports the application of ultrasound irradiation in the synthesis of ultrafine hydroxyapatite (HAp) with a high specific surface area of 300 m/g. We examined the effects of initial temperature, horn diameter and suspension concentration on the powder properties, especially specific surface area, of ultrafine HAp. Amorphous calcium phosphate (ACP), which is a precursor of HAp, was formed in the early stage of the reaction, and then rapidly crystallized to form HAp. In the case of an initial temperature at 30oC, the largest specific surface areas of 250 m/g and 300 m/g were obtained using horn diameters of 19 mm and 6 mm, respectively. Based on particle size distribution measurements, the mode and average diameters of the HAp powders were found to be 5.0 and 6.3 nm, respectively. These values were well-agreed with the average diameter calculated from the specific surface area. (Received Sep 12, 2019; Accepted Oct 25, 2019)
{"title":"SYNTHESIS OF ULTRAFINE HYDROXYAPATITE IN A Ca(OH)2-H3PO4-H2O REACTION SYSTEM USING ULTRASOUND IRRADIATION","authors":"H. Minamisawa, T. Umegaki, Y. Kojima","doi":"10.3363/prb.35.42","DOIUrl":"https://doi.org/10.3363/prb.35.42","url":null,"abstract":"This paper reports the application of ultrasound irradiation in the synthesis of ultrafine hydroxyapatite (HAp) with a high specific surface area of 300 m/g. We examined the effects of initial temperature, horn diameter and suspension concentration on the powder properties, especially specific surface area, of ultrafine HAp. Amorphous calcium phosphate (ACP), which is a precursor of HAp, was formed in the early stage of the reaction, and then rapidly crystallized to form HAp. In the case of an initial temperature at 30oC, the largest specific surface areas of 250 m/g and 300 m/g were obtained using horn diameters of 19 mm and 6 mm, respectively. Based on particle size distribution measurements, the mode and average diameters of the HAp powders were found to be 5.0 and 6.3 nm, respectively. These values were well-agreed with the average diameter calculated from the specific surface area. (Received Sep 12, 2019; Accepted Oct 25, 2019)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77948844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Photo-Fenton reaction as an advanced oxidation process for water purification was investigated in water by using a heterogeneous iron-apatite hybridized catalyst, Fe(III)-treated hydroxyapatite (HAP-400-Fe), which was further modified with humic substance, Wako humic acid (WHA), Nordic aquatic humic acid (NHA), or Nordic aquatic fulvic acid (NFA). The substrates employed in the reaction were organic dyes, methyl orange (MO) and alizarin red S (ARS), and an herbicide, atrazine (ATZ). HAP-400-Fe catalyst modified with NHA or NFA, HAP-400-Fe-NHA or HAP-400-Fe-NFA, considerably enhanced substrate consumptions in comparison with the raw HAP-400-Fe. Particularly, HAP-400-Fe-NFA indicated complete consumptions (>99%) of all the three substrates for 24 h, and exhibited higher mineralization values of MO (41%) and ARS (68%). After the reaction, it was found that the surface NFA modifier on HAP-400-Fe had been subjected to oxidative degradation to some extent, and that catalytic activity of HAP-400-Fe-NFA had been lowered to the same activity as the raw HAP-400-Fe: The modifier can afford catalytic acceleration involving its own oxidative structural degradation, namely self-sacrifice. However, the deteriorated HAP-400-Fe-NFA could be remediated by re-adsorption treatment with NFA, and the remediated catalyst could feature the same effective catalytic activity as HAP-400-Fe. The catalyst recycling through remediation and reusing was extended to at least 4 times under the same photo-Fenton condition. A kinetic investigation based on Michaelis-Menten theory also elucidated that NFA modification improves affinity and kinetic ability of HAP-400-Fe. As a predominant oxidizing species, hydroxyl radical •OH was confirmed by a control test using a •OH scavenger, 2-propanol. (Received Feb 25, 2019; Accepted Jul 16, 2019)
{"title":"BOOSTING ACTIVITY OF IRON-APATITE HYBRIDIZED CATALYST FOR PHOTO-FENTON REACTION BY SURFACE MODIFICATION WITH HUMIC SUBSTANCE AS A SACRIFICE REAGENT","authors":"T. Moriguchi, Sohei Nakagawa","doi":"10.3363/prb.35.23","DOIUrl":"https://doi.org/10.3363/prb.35.23","url":null,"abstract":"Photo-Fenton reaction as an advanced oxidation process for water purification was investigated in water by using a heterogeneous iron-apatite hybridized catalyst, Fe(III)-treated hydroxyapatite (HAP-400-Fe), which was further modified with humic substance, Wako humic acid (WHA), Nordic aquatic humic acid (NHA), or Nordic aquatic fulvic acid (NFA). The substrates employed in the reaction were organic dyes, methyl orange (MO) and alizarin red S (ARS), and an herbicide, atrazine (ATZ). HAP-400-Fe catalyst modified with NHA or NFA, HAP-400-Fe-NHA or HAP-400-Fe-NFA, considerably enhanced substrate consumptions in comparison with the raw HAP-400-Fe. Particularly, HAP-400-Fe-NFA indicated complete consumptions (>99%) of all the three substrates for 24 h, and exhibited higher mineralization values of MO (41%) and ARS (68%). After the reaction, it was found that the surface NFA modifier on HAP-400-Fe had been subjected to oxidative degradation to some extent, and that catalytic activity of HAP-400-Fe-NFA had been lowered to the same activity as the raw HAP-400-Fe: The modifier can afford catalytic acceleration involving its own oxidative structural degradation, namely self-sacrifice. However, the deteriorated HAP-400-Fe-NFA could be remediated by re-adsorption treatment with NFA, and the remediated catalyst could feature the same effective catalytic activity as HAP-400-Fe. The catalyst recycling through remediation and reusing was extended to at least 4 times under the same photo-Fenton condition. A kinetic investigation based on Michaelis-Menten theory also elucidated that NFA modification improves affinity and kinetic ability of HAP-400-Fe. As a predominant oxidizing species, hydroxyl radical •OH was confirmed by a control test using a •OH scavenger, 2-propanol. (Received Feb 25, 2019; Accepted Jul 16, 2019)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84047500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Nishida, I. Kanno, M. Kimata, T. Ogata, T. Kawai
: Hydroxyapatite (HAp)/zeolite composite (HZc) was prepared by a simple immersion method, and it was then modified with Cu 2+ and 3-aminoplopyltriethoxysilane (APES) to produce a novel adsorbent for unpleasant odors such as NH 3 , H 2 S and CH 3 CHO gases. The obtained materials were characterized by SEM-EDS, XRD, FT-IR, TG-DTA and ninhydrin reaction test. Nano-sized order HAp was observed distributed on zeolite for HZc, and modification of HZc with Cu 2+ and APES maintained the original framework structure of HZc. Introduced amount of Cu 2+ and APES after the modification was 3.6 mol% and 12.6 mg·g -1 , respectively. The adsorption ability evaluated via a gas bag-detection tube method showed that Cu 2+ -modified HZc increased NH 3 and H 2 S adsorption ability, and APES-modified HZc enhanced CH 3 CHO adsorption ability in comparison to unmodified one, respectively. Sequential modification of HZc with Cu 2+ and APES also maintained H 2 S and NH 3 adsorption ability, but decreased CH 3 CHO adsorption ability. This suggests that adsorption sites for CH 3 CHO were impeded in case of formation of Cu-N coordinate bond derived from direct interaction between Cu 2+ and amino groups of APES. Therefore, use of HZc individually modified with Cu 2+ and APES is recommended to capture multiple unpleasant odors.
{"title":"EFFECT OF CHEMICAL MODIFICATION OF HYDROXYAPATITE/ZEOLITE COMPOSITE ON MALODORS ADSORPTION BEHAVIOR","authors":"H. Nishida, I. Kanno, M. Kimata, T. Ogata, T. Kawai","doi":"10.3363/PRB.35.9","DOIUrl":"https://doi.org/10.3363/PRB.35.9","url":null,"abstract":": Hydroxyapatite (HAp)/zeolite composite (HZc) was prepared by a simple immersion method, and it was then modified with Cu 2+ and 3-aminoplopyltriethoxysilane (APES) to produce a novel adsorbent for unpleasant odors such as NH 3 , H 2 S and CH 3 CHO gases. The obtained materials were characterized by SEM-EDS, XRD, FT-IR, TG-DTA and ninhydrin reaction test. Nano-sized order HAp was observed distributed on zeolite for HZc, and modification of HZc with Cu 2+ and APES maintained the original framework structure of HZc. Introduced amount of Cu 2+ and APES after the modification was 3.6 mol% and 12.6 mg·g -1 , respectively. The adsorption ability evaluated via a gas bag-detection tube method showed that Cu 2+ -modified HZc increased NH 3 and H 2 S adsorption ability, and APES-modified HZc enhanced CH 3 CHO adsorption ability in comparison to unmodified one, respectively. Sequential modification of HZc with Cu 2+ and APES also maintained H 2 S and NH 3 adsorption ability, but decreased CH 3 CHO adsorption ability. This suggests that adsorption sites for CH 3 CHO were impeded in case of formation of Cu-N coordinate bond derived from direct interaction between Cu 2+ and amino groups of APES. Therefore, use of HZc individually modified with Cu 2+ and APES is recommended to capture multiple unpleasant odors.","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83361584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hideko Maeda, Kaori Morita, Ayaka Murokawa, Rika Matsuo, H. Nariai, H. Nakayama
Phosphonylation of kojic acid has been achieved using inorganic diphosphonate (DP) in aqueous solution. The optimum condition for the phosphonylation of kojic acid with DP is kojic acid : DP = 0.1 mol/L : 0.5 mol/L, pH 9 and 25 oC. 2-Phosphonylmethyl-kojic acid was synthesized with the yield of 45 %. The reaction mechanism of kojic acid with DP was discussed. We have successfully introduced the phosphonate group in kojic acid. Phosphonylated kojic acid is expected that the permeability of kojic acid into the skin will be increased by introducing a phosphonate group. (Received Nov 2, 2019; Accepted Nov 18, 2019)
{"title":"INTRODUCTION OF PHOSPHONATE GROUP INTO KOJIC ACID BY DIPHOSPHONATE","authors":"Hideko Maeda, Kaori Morita, Ayaka Murokawa, Rika Matsuo, H. Nariai, H. Nakayama","doi":"10.3363/prb.35.55","DOIUrl":"https://doi.org/10.3363/prb.35.55","url":null,"abstract":"Phosphonylation of kojic acid has been achieved using inorganic diphosphonate (DP) in aqueous solution. The optimum condition for the phosphonylation of kojic acid with DP is kojic acid : DP = 0.1 mol/L : 0.5 mol/L, pH 9 and 25 oC. 2-Phosphonylmethyl-kojic acid was synthesized with the yield of 45 %. The reaction mechanism of kojic acid with DP was discussed. We have successfully introduced the phosphonate group in kojic acid. Phosphonylated kojic acid is expected that the permeability of kojic acid into the skin will be increased by introducing a phosphonate group. (Received Nov 2, 2019; Accepted Nov 18, 2019)","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75871596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hydroxyapatite (HAp) samples were prepared from precursor solutions with different Ca/P molar ratios. The HAp samples were utilized as catalysts for the oxidative dehydrogenation (ODH) of isobutane. Also, the HAp samples were characterized by N2 and H2O adsorption-desorption measurements, X-ray diffraction, inductively coupled plasma optical emission spectrometry, thermogravimetry-differential thermal analyses, and temperature-programmed oxidation (TPO). The Ca/P molar ratio of the precursor solution had a major influence on the catalytic activity and coking resistance ability. The HAp catalyst prepared from the stoichiometric precursor solution [HAp (1.67)] showed the highest isobutene yield. Furthermore, the white color of HAp (1.67) remained unchanged during the ODH of isobutene, indicating the absence of coke on the surface of HAp (1.67) after the reaction and its higher coking resistance ability. The results of the TPO measurements showed that the HAp (1.67) catalyst possesses the strongest oxidation ability which is likely related to its higher coking resistance ability.
{"title":"CATALYTIC ACTIVITY AND COKING RESISTANCE ON HYDROXYAPATITE FOR THE OXIDATIVE DEHYDROGENATION OF ISOBUTANE","authors":"T. Ehiro, S. Dohshi, M. Katoh, S. Sugiyama","doi":"10.3363/prb.35.48","DOIUrl":"https://doi.org/10.3363/prb.35.48","url":null,"abstract":"Hydroxyapatite (HAp) samples were prepared from precursor solutions with different Ca/P molar ratios. The HAp samples were utilized as catalysts for the oxidative dehydrogenation (ODH) of isobutane. Also, the HAp samples were characterized by N2 and H2O adsorption-desorption measurements, X-ray diffraction, inductively coupled plasma optical emission spectrometry, thermogravimetry-differential thermal analyses, and temperature-programmed oxidation (TPO). The Ca/P molar ratio of the precursor solution had a major influence on the catalytic activity and coking resistance ability. The HAp catalyst prepared from the stoichiometric precursor solution [HAp (1.67)] showed the highest isobutene yield. Furthermore, the white color of HAp (1.67) remained unchanged during the ODH of isobutene, indicating the absence of coke on the surface of HAp (1.67) after the reaction and its higher coking resistance ability. The results of the TPO measurements showed that the HAp (1.67) catalyst possesses the strongest oxidation ability which is likely related to its higher coking resistance ability.","PeriodicalId":20022,"journal":{"name":"Phosphorus Research Bulletin","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86533077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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