Solution-derived ZnO quantum dot is one of the most widely used electron-transport layers in optoelectronic devices. To achieve high-efficiency in optoelectronic devices it is required that a thin film of ZnO quantum dot with low surface roughness and low defect intensity is developed. Herein, alcoholic solvents with different alkyl lengths were utilized to dissolve tetramethylammonium hydroxide to fine-tune the polarity of the solution, to achieve ZnO quantum dots with controllable particle size and monodisperse in alcohol solvents. Two kinds of ZnO quantum dots with particle sizes of 6 and 12 nm detected by dynamic light scattering were successfully prepared by this method. Furthermore, by mixing these two types of quantum dots, ZnO films with a different packing mode were fabricated, which exhibited lower surface defect density and surface roughness. This approach offers a novel pathway to reduce issues such as current leakage associated with ZnO as an electron-transport layer. What's more, the small particle size ZnO quantum dots effectively fill the gaps between the large particle size quantum dots, resulting in a film with a higher density of quantum dots. This increased density contributes to the higher electrical conductivity of the ZnO film.
{"title":"Solution-processed ZnO thin film with high-density quantum dots via particle size control strategy","authors":"Liubin Zheng, Nozomi Yunoki, Nana Suzuki, Kenji Ogino","doi":"10.1093/bulcsj/uoae062","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae062","url":null,"abstract":"\u0000 Solution-derived ZnO quantum dot is one of the most widely used electron-transport layers in optoelectronic devices. To achieve high-efficiency in optoelectronic devices it is required that a thin film of ZnO quantum dot with low surface roughness and low defect intensity is developed. Herein, alcoholic solvents with different alkyl lengths were utilized to dissolve tetramethylammonium hydroxide to fine-tune the polarity of the solution, to achieve ZnO quantum dots with controllable particle size and monodisperse in alcohol solvents. Two kinds of ZnO quantum dots with particle sizes of 6 and 12 nm detected by dynamic light scattering were successfully prepared by this method. Furthermore, by mixing these two types of quantum dots, ZnO films with a different packing mode were fabricated, which exhibited lower surface defect density and surface roughness. This approach offers a novel pathway to reduce issues such as current leakage associated with ZnO as an electron-transport layer. What's more, the small particle size ZnO quantum dots effectively fill the gaps between the large particle size quantum dots, resulting in a film with a higher density of quantum dots. This increased density contributes to the higher electrical conductivity of the ZnO film.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141408264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, near-infrared absorbing rotaxane-type cyanine dyes exhibit high tolerance to various chemical reactions, which is attributed to the encapsulation effect of their cyclic molecules. As a result, rotaxane dyes can be post-modified on the host α-cyclodextrin or guest cyanine skeleton to adjust their solubility, absorption wavelength, stability, and singlet oxygen generation ability. The guest modification product obtained via the Heck reaction demonstrates a red shift of its absorption wavelength owing to the extended conjugation system. Moreover, the products of host modification through the methylation and benzylation of all cyclodextrin hydroxyl groups not only become lipophilic and show extended absorption, but also exhibit higher photooxidation tolerance, lower singlet oxygen generation rate, and increased singlet oxygen tolerance, indicating their potential applicability as highly durable dyes. Furthermore, the outstanding singlet oxygen tolerance of these dyes enables their use in long-life singlet oxygen generators, in which the total amount of singlet oxygen increases. This work demonstrates that an intrinsically unstable near-infrared cyanine dye can be used as a synthetic intermediate by stabilizing it via α-cyclodextrin encapsulation, allowing the post-modification of various properties of cyanine dyes toward the higher-order near-infrared-absorbing materials with complex functionalities and diverse utilities.
{"title":"Post-synthetic modification of near-infrared absorbing cyclodextrin-encapsulated cyanine dyes for controlling absorption wavelength, stability, and singlet oxygen generation","authors":"Huimin Zhang, Yoichi Masui, H. Masai, J. Terao","doi":"10.1093/bulcsj/uoae055","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae055","url":null,"abstract":"\u0000 In this study, near-infrared absorbing rotaxane-type cyanine dyes exhibit high tolerance to various chemical reactions, which is attributed to the encapsulation effect of their cyclic molecules. As a result, rotaxane dyes can be post-modified on the host α-cyclodextrin or guest cyanine skeleton to adjust their solubility, absorption wavelength, stability, and singlet oxygen generation ability. The guest modification product obtained via the Heck reaction demonstrates a red shift of its absorption wavelength owing to the extended conjugation system. Moreover, the products of host modification through the methylation and benzylation of all cyclodextrin hydroxyl groups not only become lipophilic and show extended absorption, but also exhibit higher photooxidation tolerance, lower singlet oxygen generation rate, and increased singlet oxygen tolerance, indicating their potential applicability as highly durable dyes. Furthermore, the outstanding singlet oxygen tolerance of these dyes enables their use in long-life singlet oxygen generators, in which the total amount of singlet oxygen increases. This work demonstrates that an intrinsically unstable near-infrared cyanine dye can be used as a synthetic intermediate by stabilizing it via α-cyclodextrin encapsulation, allowing the post-modification of various properties of cyanine dyes toward the higher-order near-infrared-absorbing materials with complex functionalities and diverse utilities.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141278709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Retraction of: Direct Joining of a Heterogeneous Pair of Supramolecular Nanotubes and Reaction Control of a Guest Compound by Transportation in the Nanochannels","authors":"","doi":"10.1093/bulcsj/uoae059","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae059","url":null,"abstract":"","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141281061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The interplay between N, O-orthometallated, O, O′-chelated and dibutyltin(IV) groups in biopotent hybrid formulations to combat tuberculosis is deciphered. The present study emphasized on the design, generation, spectroscopic as well as DFT assisted structural characterization, understanding structure-antitubercular activity relationship and mode of action of some dibutyltin(IV) formulations against Mycobacterium tuberculosis as possible antituberculosis agents. Dibutyltin(IV) formulations of the general formula Bu2SnLL′ (where LH = heterocyclic/non-fluorinated/fluorinated β-diketones and L′H = aminophenol/substituted aminophenols) have been generated by the reaction of Bu2SnCl2 with sodium salts of the ligands in 1:1:1 molar ratio. The newly generated dibutyltin(IV) formulations have been characterized with the assistance of spectroscopic techniques and mass studies. Computational calculations of some representative complexes (1 and 2) also supported the obtained spectral data. Antituberculosis activity analysis was also performed on some representative dibutyltin(IV) complexes (1, 4 and 8). Out of these, complex 4 demonstrated highest activity against Mycobacterium tuberculosis. The structure-antitubercular activity relationship and mechanism of action of the active complexes against Mycobacterium tuberculosis have also been investigated. Intercluster electron hopping mechanism of mode of action has also been suggested.
{"title":"Dibutyltin(IV) Formulations as Potential Antitubercular Scaffold: DFT Assisted Emerging Advances and Mechanism of Antitubercular Action","authors":"Komal Soni, Anita Kumawat, S. Saxena, Asha Jain","doi":"10.1093/bulcsj/uoae056","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae056","url":null,"abstract":"\u0000 The interplay between N, O-orthometallated, O, O′-chelated and dibutyltin(IV) groups in biopotent hybrid formulations to combat tuberculosis is deciphered. The present study emphasized on the design, generation, spectroscopic as well as DFT assisted structural characterization, understanding structure-antitubercular activity relationship and mode of action of some dibutyltin(IV) formulations against Mycobacterium tuberculosis as possible antituberculosis agents. Dibutyltin(IV) formulations of the general formula Bu2SnLL′ (where LH = heterocyclic/non-fluorinated/fluorinated β-diketones and L′H = aminophenol/substituted aminophenols) have been generated by the reaction of Bu2SnCl2 with sodium salts of the ligands in 1:1:1 molar ratio. The newly generated dibutyltin(IV) formulations have been characterized with the assistance of spectroscopic techniques and mass studies. Computational calculations of some representative complexes (1 and 2) also supported the obtained spectral data. Antituberculosis activity analysis was also performed on some representative dibutyltin(IV) complexes (1, 4 and 8). Out of these, complex 4 demonstrated highest activity against Mycobacterium tuberculosis. The structure-antitubercular activity relationship and mechanism of action of the active complexes against Mycobacterium tuberculosis have also been investigated. Intercluster electron hopping mechanism of mode of action has also been suggested.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The 2-naphthol derivative 2, which corresponds to the aromatic moiety of the enediyne antibiotic N1999A2, was found to degrade protein under irradiation with long-wavelength UV light in the absence of any additives. Structure-activity relationship studies of 2 indicated that 3, in which the primary hydroxyl group at the C5 position of 2 is modified with a t-butyldiphenylsilyl (TBDPS) group, has strong protein photodegradation ability. Furthermore, the theranostic molecule 5 was designed and synthesized. Compound 5 comprises a disulfide moiety linked to the hydroxyl group at the C2 position of 3 and to the fluorescent molecule dicyanomethylene-4H-pyran (DCM) chromophore derivative 6. The disulfide moiety is cleaved in the presence of glutathione, 5 showed significantly reduced photolytic activity and fluorescence compared to 3 and 6, but produced 3 and 6 when reacted with glutathione. 5 showed selective fluorescence and photocytotoxicity against cancer cells that highly express glutathione.
{"title":"Discovery of a novel photosensitizer based on the enediyne antibiotic N1999A2 and its application as a glutathione-activatable theranostic agent","authors":"Kotono Matsunaga, Minami Takahashi, Tugumi Kagaya, Daisuke Takahashi, Kazunobu Toshima","doi":"10.1093/bulcsj/uoae057","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae057","url":null,"abstract":"\u0000 The 2-naphthol derivative 2, which corresponds to the aromatic moiety of the enediyne antibiotic N1999A2, was found to degrade protein under irradiation with long-wavelength UV light in the absence of any additives. Structure-activity relationship studies of 2 indicated that 3, in which the primary hydroxyl group at the C5 position of 2 is modified with a t-butyldiphenylsilyl (TBDPS) group, has strong protein photodegradation ability. Furthermore, the theranostic molecule 5 was designed and synthesized. Compound 5 comprises a disulfide moiety linked to the hydroxyl group at the C2 position of 3 and to the fluorescent molecule dicyanomethylene-4H-pyran (DCM) chromophore derivative 6. The disulfide moiety is cleaved in the presence of glutathione, 5 showed significantly reduced photolytic activity and fluorescence compared to 3 and 6, but produced 3 and 6 when reacted with glutathione. 5 showed selective fluorescence and photocytotoxicity against cancer cells that highly express glutathione.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140973901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The direct partial oxidation of methane to oxygenates remains challenging. Here, CO-assisted methane conversion was investigated using an Ir-ZSM-5 catalyst, and it achieved higher C1 selectivity compared with that achieved using a model Rh-ZSM-5 catalyst. A plausible reaction sequence is proposed via kinetic analysis, and the differences between the two catalysts were revealed.
将甲烷直接部分氧化为含氧化合物仍具有挑战性。本文研究了使用 Ir-ZSM-5 催化剂进行 CO 辅助甲烷转化的情况，与使用模型 Rh-ZSM-5 催化剂相比，该催化剂获得了更高的 C1 选择性。通过动力学分析提出了一个合理的反应顺序，并揭示了两种催化剂之间的差异。
{"title":"CO-assisted partial oxidation of methane and selective C1 oxygenate formation using iridium-ZSM-5 catalyst","authors":"Takahiko Moteki, Naoto Tominaga, Masaru Ogura","doi":"10.1093/bulcsj/uoae053","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae053","url":null,"abstract":"\u0000 The direct partial oxidation of methane to oxygenates remains challenging. Here, CO-assisted methane conversion was investigated using an Ir-ZSM-5 catalyst, and it achieved higher C1 selectivity compared with that achieved using a model Rh-ZSM-5 catalyst. A plausible reaction sequence is proposed via kinetic analysis, and the differences between the two catalysts were revealed.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140991111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Colloidal titration is a unique method to measure the concentration of charged groups based on the association between cationic and anionic colloids. Titrimetry must involve a unidirectional reaction with a large formation constant. However, the underlying polyelectrolyte complex (PEC) for colloidal titration lacks sufficient data regarding the stability constants (KI). To date, the stoichiometry of colloidal titration has not been discussed in relation to KI. Thus, in this paper, we reviewed PEC studies by focusing on KI and discuss colloidal titration comprehensively. The topics include the history of its establishment, the method to calculate KI, and the special characteristics of PEC compared with ion association reactions, the practical use of colloid titration, and the condition by which the stability constant can be increased. In terms of analytical reagents, polyelectrolytes are similar to (but positioned as a subspecies of) ion association reagents. Ionic strength strongly affects KIs values. Excluding coaggregation effects, the maximum values of log10 KI obtained from reliable data were found to decrease linearly with as ionic strength increases logarithmically. The critical line connected with the maximum KI value at each ionic strength can be used as an empirical reference value and facilitate the analytical design of colloidal titration.
胶体滴定法是根据阳离子和阴离子胶体之间的关联来测量带电基团浓度的一种独特方法。滴定法必须涉及具有较大形成常数的单向反应。然而，用于胶体滴定的基本聚电解质复合物（PEC）缺乏有关稳定性常数（KI）的充足数据。迄今为止，还没有人讨论过胶体滴定的化学计量学与 KI 的关系。因此，在本文中，我们以 KI 为重点回顾了 PEC 研究，并对胶体滴定进行了全面讨论。内容包括其建立的历史、计算 KI 的方法、与离子结合反应相比 PEC 的特殊性、胶体滴定的实际应用以及提高稳定常数的条件。就分析试剂而言，聚电解质与离子结合试剂类似（但被定位为离子结合试剂的一个亚种）。离子强度对 KIs 值有很大影响。如果不考虑共聚效应，从可靠数据中获得的 log10 KI 最大值会随着离子强度的对数增加而线性降低。与各离子强度下最大 KI 值相连的临界线可作为经验参考值，便于胶体滴定的分析设计。
{"title":"Colloidal titration: From the perspective of stability constants between oppositely charged polyelectrolytes","authors":"Toshiaki Hattori","doi":"10.1093/bulcsj/uoae044","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae044","url":null,"abstract":"\u0000 Colloidal titration is a unique method to measure the concentration of charged groups based on the association between cationic and anionic colloids. Titrimetry must involve a unidirectional reaction with a large formation constant. However, the underlying polyelectrolyte complex (PEC) for colloidal titration lacks sufficient data regarding the stability constants (KI). To date, the stoichiometry of colloidal titration has not been discussed in relation to KI. Thus, in this paper, we reviewed PEC studies by focusing on KI and discuss colloidal titration comprehensively. The topics include the history of its establishment, the method to calculate KI, and the special characteristics of PEC compared with ion association reactions, the practical use of colloid titration, and the condition by which the stability constant can be increased. In terms of analytical reagents, polyelectrolytes are similar to (but positioned as a subspecies of) ion association reagents. Ionic strength strongly affects KIs values. Excluding coaggregation effects, the maximum values of log10 KI obtained from reliable data were found to decrease linearly with as ionic strength increases logarithmically. The critical line connected with the maximum KI value at each ionic strength can be used as an empirical reference value and facilitate the analytical design of colloidal titration.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141015265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ryoma Terui, Yuto Otsuki, Yuji Shibasaki, A. Fujimori
The metal-trapping and metal-desorption abilities and selective metal-scavenging properties of an interfacial molecular film of a highly ordered copolymer that exhibits spherulite-forming ability in the bulk state, despite having bulky azacalixarene rings, were investigated. The synthesized copolymer contained an azacalixarene ring and a crystalline polyethylene-glycol-chain-based repeating unit. The monolayer on the water surface of this copolymer was able to collect various metal ions from the subphase and trap monovalent ions; this was not possible with other derivatives. As the metal cations were incorporated via weak interactions with the applied electric field inside the azacalixarene ring, they could be desorbed or recovered by using simple ultrasonic treatment. The valences and ionic radii of the captured cations strongly influenced the desorption behavior. In addition, characteristic selectivity was confirmed by evaluating the ability to capture metals from the subphase containing multiple metal cations. The preference for the trapping ion was strongly correlated with the difficulty of desorption from the azacalixarene ring.
{"title":"Metal-desorption and selective metal-trapping properties of an organized molecular film of azacalixarene-containing copolymer with spherulite-forming ability","authors":"Ryoma Terui, Yuto Otsuki, Yuji Shibasaki, A. Fujimori","doi":"10.1093/bulcsj/uoae050","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae050","url":null,"abstract":"\u0000 The metal-trapping and metal-desorption abilities and selective metal-scavenging properties of an interfacial molecular film of a highly ordered copolymer that exhibits spherulite-forming ability in the bulk state, despite having bulky azacalixarene rings, were investigated. The synthesized copolymer contained an azacalixarene ring and a crystalline polyethylene-glycol-chain-based repeating unit. The monolayer on the water surface of this copolymer was able to collect various metal ions from the subphase and trap monovalent ions; this was not possible with other derivatives. As the metal cations were incorporated via weak interactions with the applied electric field inside the azacalixarene ring, they could be desorbed or recovered by using simple ultrasonic treatment. The valences and ionic radii of the captured cations strongly influenced the desorption behavior. In addition, characteristic selectivity was confirmed by evaluating the ability to capture metals from the subphase containing multiple metal cations. The preference for the trapping ion was strongly correlated with the difficulty of desorption from the azacalixarene ring.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141030083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, a sensitive, fast, and inexpensive new potentiometric determination method based on the Folin–Ciocalteu reagent (FCR) is proposed to determine the total phenolic content in plant extracts. For this purpose, a potentiometric-based all-solid-state-contact polyvinyl chloride membrane sensor was developed. Gallic acid compound was used as the active component (ionophore) in the developed sensor and the potentiometric behavior of the sensor was characterized. The detection limit of the selective sensor to the FCR was determined as 0.022 mol L−1 and showed a linear potential change in the concentration range of 0.0039 to 0.5 mol L−1 and a fast response time of 40 to 45 s. The developed sensor was also applied to the plant extracts and the obtained measurement results were found to be in agreement with the spectrometer results in the literature.
{"title":"New potentiometric sensor for total phenolic assay of plant extracts","authors":"Ö. Isildak, Ilyas Yildiz","doi":"10.1093/bulcsj/uoae043","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae043","url":null,"abstract":"\u0000 In this study, a sensitive, fast, and inexpensive new potentiometric determination method based on the Folin–Ciocalteu reagent (FCR) is proposed to determine the total phenolic content in plant extracts. For this purpose, a potentiometric-based all-solid-state-contact polyvinyl chloride membrane sensor was developed. Gallic acid compound was used as the active component (ionophore) in the developed sensor and the potentiometric behavior of the sensor was characterized. The detection limit of the selective sensor to the FCR was determined as 0.022 mol L−1 and showed a linear potential change in the concentration range of 0.0039 to 0.5 mol L−1 and a fast response time of 40 to 45 s. The developed sensor was also applied to the plant extracts and the obtained measurement results were found to be in agreement with the spectrometer results in the literature.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141037569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sandip R. Kale, Virbhadra Kalalawe, Jeevan M. Kondre, S. Kahandal, S. Disale
The rational design of a new method has been reported for the synthesis of α-aminophosphonates from alcohols, amines, and phosphonates using palladium-supported hydroxyapatite (Pd-HAP) as a catalyst. This synthetic protocol involves alcohol oxidation to aldehyde over Pd-HAP followed by condensation with amine and phosphonates to form α-aminophosphonates in one pot. The catalyst demonstrated excellent catalytic activity for up to four cycles without any appreciable activity loss. This strategy provides advantages such as heterogeneous catalyst, mild reaction conditions, simple experimental and work-up procedure, high yield, low cost, alcohol use instead of unstable aldehyde, and environmental friendliness.
{"title":"A new protocol for the one-pot synthesis of α-aminophosphonates using hydroxyapatite-supported palladium as a solid and reusable catalyst","authors":"Sandip R. Kale, Virbhadra Kalalawe, Jeevan M. Kondre, S. Kahandal, S. Disale","doi":"10.1093/bulcsj/uoae052","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae052","url":null,"abstract":"\u0000 The rational design of a new method has been reported for the synthesis of α-aminophosphonates from alcohols, amines, and phosphonates using palladium-supported hydroxyapatite (Pd-HAP) as a catalyst. This synthetic protocol involves alcohol oxidation to aldehyde over Pd-HAP followed by condensation with amine and phosphonates to form α-aminophosphonates in one pot. The catalyst demonstrated excellent catalytic activity for up to four cycles without any appreciable activity loss. This strategy provides advantages such as heterogeneous catalyst, mild reaction conditions, simple experimental and work-up procedure, high yield, low cost, alcohol use instead of unstable aldehyde, and environmental friendliness.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141045374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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