Bulletin of the Chemical Society of Japan最新文献

Nano-sized magnetic TiO2–SiO2/Fe3O4 photocatalysts and their application to photokilling of Lactobacillus casei and photocatalytic degradation of persistent herbicides 纳米磁性TiO2-SiO2 /Fe3O4光催化剂及其在干酪乳杆菌光杀灭和持久性除草剂光催化降解中的应用

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2025-09-30 DOI: 10.1093/bulcsj/uoaf095

Manabu Kiguchi, Jingshen Wang, Yuxin Li, Dan Zhang, Zhongoing Liang, Mei Ma, Akira Fujishima, Nobuhiro Hanada

{"title":"Nano-sized magnetic TiO2–SiO2/Fe3O4 photocatalysts and their application to photokilling of <i>Lactobacillus casei</i> and photocatalytic degradation of persistent herbicides","authors":"Manabu Kiguchi, Jingshen Wang, Yuxin Li, Dan Zhang, Zhongoing Liang, Mei Ma, Akira Fujishima, Nobuhiro Hanada","doi":"10.1093/bulcsj/uoaf095","DOIUrl":"https://doi.org/10.1093/bulcsj/uoaf095","url":null,"abstract":"Abstract Nano-sized magnetic photocatalysts (nano TiO2–SiO2/Fe3O4) with a particle size of approximately 20 nm were developed for efficient water treatment. Their photocatalytic performance was comparable to those of nanoparticle photocatalysts P25. Furthermore, the photocatalysts could be conveniently separated from treated water by using a magnet. We then applied the photocatalysts to the photokilling of Lactobacillus casei and degradation of persistent herbicides (simetryn, prometryn, metolachlor, and sulfometuron methyl). L. casei, a Gram-positive bacterium lacking an outer membrane, was introduced and validated as a reliable model bacterium for photocatalytic antibacterial assessments. Complete photokilling of L. casei occurred within 50 min of ultraviolet (UV) irradiation, demonstrating simpler kinetic behavior compared with traditionally used Gram-negative model organisms. The photocatalysts also exhibited effective degradation toward 4 persistent herbicides. Their concentrations decreased from 10 ppm to below 1 ppm within 120 min.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"98 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147907120","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}

引用次数: 2

Carboxyl-functionalized covalent organic framework for high-performance capacitive deionization 用于高性能电容去离子的羧基功能化共价有机骨架

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2025-09-01 DOI: 10.1093/bulcsj/uoaf053

Ruibo Xu, Xingtao Xu, Azhar Alowasheeir, Yusuke Yamauchi, Dong Jiang

{"title":"Carboxyl-functionalized covalent organic framework for high-performance capacitive deionization","authors":"Ruibo Xu, Xingtao Xu, Azhar Alowasheeir, Yusuke Yamauchi, Dong Jiang","doi":"10.1093/bulcsj/uoaf053","DOIUrl":"https://doi.org/10.1093/bulcsj/uoaf053","url":null,"abstract":"Abstract Covalent organic frameworks (COFs) are emerging as promising candidates for high-performance capacitive deionization (CDI) for their ordered pore architectures, tunable functionalization, and abundant active sites. Here, we demonstrate a carboxyl-functionalized COF (TpPa-COOH-COF) for enhanced CDI performance. Comprehensive structural characterizations reveal that the microporous channels of TpPa-COOH-COF, decorated with carboxyl groups exhibit superior electrochemical performance and high salt adsorption capacity (SAC) compared to its non-functionalized counterpart (TpPa-COF). The integration of carboxyl groups within the material enhances the efficient adsorption of Na+, leveraging a combination of electrostatic forces and ligand coordination. In a hybrid CDI (HCDI) system, TpPa-COOH-COF electrode demonstrates remarkable desalination performance, achieving a SAC of 70.49 mg g−1 in a 2,000 mg L−1 NaCl solution under 1.6 V. Furthermore, the pH-dependent ionization behavior of carboxyl within the channel endows the electrode with tunable ion selectivity. Selective Na+ adsorption dominates under weakly acidic to neutral conditions (pH 4 and 7), while K+ selectivity increases under mildly alkaline condition (pH 9). The successful integration of carboxyl with ordered porous architectures provides a strategic pathway for developing next-generation desalination systems with improved efficiency and tunable ion selectivity.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"98 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147897873","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}

引用次数: 3

SDS-intercalated CoFe-LDH/FeOOH heterostructures: dual structural–electronic tailoring for efficient oxygen evolution reaction sds插层咖啡- ldh /FeOOH异质结构：用于高效析氧反应的双结构-电子裁剪

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2025-08-29 DOI: 10.1093/bulcsj/uoaf077

Jingwen Zeng, Rongrong Dai, Yadong Sun, Qi Jiang, Yingtang Zhou, Haiyan Hu, Zeinhom M. El‐Bahy, Xingtao Xu, Azhar Alowasheeir, Yusuke Yamauchi

{"title":"SDS-intercalated CoFe-LDH/FeOOH heterostructures: dual structural–electronic tailoring for efficient oxygen evolution reaction","authors":"Jingwen Zeng, Rongrong Dai, Yadong Sun, Qi Jiang, Yingtang Zhou, Haiyan Hu, Zeinhom M. El‐Bahy, Xingtao Xu, Azhar Alowasheeir, Yusuke Yamauchi","doi":"10.1093/bulcsj/uoaf077","DOIUrl":"https://doi.org/10.1093/bulcsj/uoaf077","url":null,"abstract":"Abstract An efficient sodium dodecanesulfonate (SDS)-intercalated CoFe-layered double hydroxide (LDH)/FeOOH electrocatalyst with a hierarchical structure was synthesized through a facile hydrothermal method for enhanced seawater oxidation. The intercalation of SDS expanded the interlayer spacing of LDHs markedly from 0.78 to 3.2 nm, optimizing mass transport channels and increasing reactive adsorption space. Geometric phase analysis revealed that the resulting lattice strain field exhibited disordered characteristics, which disrupted the symmetry of the original Co–O–Fe bonds and regulated the electronic structure of active sites through local lattice distortion. The proportion of defective oxygen increased from 69% to 84% after intercalation, providing abundant active sites for adsorbing critical intermediates (*OOH). Additionally, SDS acted as a surfactant, reducing the thickness of LDH nanosheets and exposing more edge-active sites. Electrocatalytic oxygen evolution reaction (OER) tests demonstrated that the SDS-intercalated CoFe-LDH/FeOOH achieved an overpotential of 290 mV at 10 mA cm−2, markedly lower than that of the nonintercalated sample (400 mV). Furthermore, no significant current density decay was observed during a 50-h stability test in natural seawater + 1 M KOH electrolyte.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"98 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147886449","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}

引用次数: 0

Biomass carbon quantum dot–Zr hybrids as excellent and recyclable catalysts for catalytic transfer hydrogenation of furfural to furfuryl alcohol in isopropanol 生物质碳量子点- zr杂化物作为异丙醇中糠醛催化转移加氢制糠醇的优良可回收催化剂

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2025-07-25 DOI: 10.1093/bulcsj/uoaf070

Qiao Zhang, Huanhuan Zhang, Chao Zhang, Yachun Liu, Zaihui Fu

{"title":"Biomass carbon quantum dot–Zr hybrids as excellent and recyclable catalysts for catalytic transfer hydrogenation of furfural to furfuryl alcohol in isopropanol","authors":"Qiao Zhang, Huanhuan Zhang, Chao Zhang, Yachun Liu, Zaihui Fu","doi":"10.1093/bulcsj/uoaf070","DOIUrl":"https://doi.org/10.1093/bulcsj/uoaf070","url":null,"abstract":"Abstract The low-polymerized Zr-O-Zr units in hydrous ZrO2(H) are very active for the catalytic transfer hydrogenation (CTH) of furfural to furfuryl alcohol, but during CTH process, they easily turn into high- polymerized states by dehydration among their Zr-OH groups, resulting in the deactivation of ZrO2(H). This work discloses that using bamboo powder-derived biomass carbon quantum dot (BCQD) and ZrCl4-derived ZrO2 sol nanoparticles (2-5 nm NPs) as the basic framework units, a network structure hybrid BCQD-Zr is conveniently fabricated in lost cost under mild dehydration conditions. Due to the enhanced Lewis acidity and stability of Zr-O-Zr and Zr-O-C species, the suggested BCQD-Zr is very efficient and stable to the above CTH reaction in isopropanol medium and the best one can achieve up to 99.9% furfural conversion with 98.4% furfuryl alcohol yield under the optimized reaction conditions and still keep an excellent CTH activity and selectivity after the fifth cycle run, which is superior to most of the analogous catalysts reported at present in terms of catalyst availability, catalysis efficiency or recyclability. This work provides a potential way to fully use discarded biomass but also low-cost and high-performance of Zr-based catalyst for the CTH conversion of furfural to furfuryl alcohol.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"98 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333081","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}

引用次数: 1

Photoinduced synthesis of ultrafine Pt nanoparticles loaded on the surface of metal-organic frameworks-modified carbon materials for efficient catalytic reduction reactions 光诱导合成负载在金属-有机框架-修饰碳材料表面的超细铂纳米粒子用于高效催化还原反应

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2025-02-07 DOI: 10.1093/bulcsj/uoaf009

Liang Xian, Xiaoxia Tian, Zhaomin Liu, Shuxin Liu, Jiuzhou Zhao

{"title":"Photoinduced synthesis of ultrafine Pt nanoparticles loaded on the surface of metal-organic frameworks-modified carbon materials for efficient catalytic reduction reactions","authors":"Liang Xian, Xiaoxia Tian, Zhaomin Liu, Shuxin Liu, Jiuzhou Zhao","doi":"10.1093/bulcsj/uoaf009","DOIUrl":"https://doi.org/10.1093/bulcsj/uoaf009","url":null,"abstract":"Abstract In this paper, ultrafine platinum nanoparticles (Pt/Co-N-C) were prepared by irradiating the mixture of Co-N-C and K2[PtCl4] with near-ultraviolet light at a wavelength of 395 nm and visible light at 450 and 550 nm without adding any reducing and stabilizing agents using metal-organic frameworks-modified carbon materials (Co-N-C) as the carrier. The composition and morphology of the Pt/Co-N-C catalysts were investigated using characterization tools such as X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and high-resolution transmission electron microscopy, etc. The results showed that the Pt nanoparticles were well dispersed on the surface of the Co-N-C, with average particle sizes of about 2.39, 2.86, and 3.53 nm, respectively. In the catalytic 4-NP reduction experiments, the catalyst (Pt/Co-N-C-1) prepared under near-ultraviolet light (395 nm) irradiation showed the highest catalytic activity with a rate constant k = 0.64 min−1. After 5 cycles, the conversion rate was still maintained at about 90%, which was highly reusable. It was demonstrated that 395 nm near-ultraviolet light was more favorable for the modulation of the distribution of the species during the hydrolysis and reduction of platinum in this reaction to form smaller-sized platinum nanocrystals, which was conducive to the catalyst to exhibit higher activity.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"98 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147890747","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}

引用次数: 2

Highly efficient direct air capture using solid–liquid phase separation in aqueous diamine solution as sorbent 利用二胺水溶液中的固液相分离作为吸附剂，高效直接捕获空气

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-09-17 DOI: 10.1093/bulcsj/uoae096

Furong Cao, Soichi Kikkawa, Hidetaka Yamada, Seiji Yamazoe

{"title":"Highly efficient direct air capture using solid–liquid phase separation in aqueous diamine solution as sorbent","authors":"Furong Cao, Soichi Kikkawa, Hidetaka Yamada, Seiji Yamazoe","doi":"10.1093/bulcsj/uoae096","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae096","url":null,"abstract":"To reduce climate change, absorbing CO2 directly from the air (DAC) with high-efficient CO2 absorption, low-cost, and environmentally friendly system has been attracted much attention for several decades. In this work, a series of aqueous diamine solutions was examined for 400ppm CO2 absorption at ambient temperature. The absorbents exhibited CO2 absorption with molar ratio of 1 molCO2/molamine, and aqueous isophorone diamine (IPDA) in particular showed &gt;99% CO2 removal even under a 500 mL min−1 flow of 400ppm CO2-N2 with the contact rate of 13,761.5 h−1 between CO2 and IPDA aqueous solution and the CO2 absorption rate of 4.46 mmol/L·min. A precipitate of carbamic acid of IPDA was formed by reaction with CO2, and the CO2 removal efficiency was enhanced by increasing the solution viscosity by the formation of this precipitate. The CO2 was absorbed in aqueous IPDA solution as carbamic acid of IPDA and bicarbonate/carbonate species, and the absorbed CO2 could desorb by heating under O2-containing gas flow, which indicates our system is applicable to the CO2 condensation for a plant growth. This work provides a fundamental information to establishing a solid–liquid phase change system with a high-efficient and environmentally friendly DAC system using aqueous solvent.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"13 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142249875","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}

引用次数: 0

Acid-induced Conformational Switching of Helical Foldamers Containing Imidazole Amide 酸诱导含咪唑酰胺的螺旋折叠体的构象转换

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-09-11 DOI: 10.1093/bulcsj/uoae094

Sakiko Kimura, Fumi Takeda, Ayano Ikeda, Asuka Tanimoto, Kosuke Katagiri, Masatoshi Kawahata, Yusuke Okada, Nagao Kobayashi, Hiroyuki Kagechika, Aya Tanatani

{"title":"Acid-induced Conformational Switching of Helical Foldamers Containing Imidazole Amide","authors":"Sakiko Kimura, Fumi Takeda, Ayano Ikeda, Asuka Tanimoto, Kosuke Katagiri, Masatoshi Kawahata, Yusuke Okada, Nagao Kobayashi, Hiroyuki Kagechika, Aya Tanatani","doi":"10.1093/bulcsj/uoae094","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae094","url":null,"abstract":"N-Alkylated oligo- and poly(p-benzamide)s exist as dynamic helical structures with all-cis amide conformation. Imidazole N-alkylated amides also show cis conformational preference, but their major conformer is changed from cis to trans by addition of acid. Here, based on those findings, we designed and synthesized aromatic triamides 3 and hexaamides 4 containing an imidazole ring as candidate foldamers anticipated to exhibit acid-induced conformational change. X-Ray structure analysis of oligomer 3c showed that it takes all-cis conformation in the crystal. In solution, all the oligoamides examined existed as an equilibrium mixture of four conformers, among which the major conformer was the folded all-cis structure as judged from the low-temperature 1H NMR spectra. When trifluoroacetic acid-d was added to a solution of the oligoamides in methylene chloride-d2, only two conformers were observed in the low-temperature 1H NMR spectra, and the major conformer was the (trans, cis) form with respect to the amide bonds of the imidazole at the 4 and 2 positions. Experimental and theoretical analysis of the CD spectra indicated that the conformation of hexaamides 4 changes upon addition of acid. Our results suggest that N-alkylated imidazoleamide can serve as a key structural motif for the construction of foldamers with acid-switchable conformation.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"32 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186103","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}

引用次数: 0

Effect of the Supported Metal Species on Soot Oxidation over PGM/CeO2–ZrO2 支撑金属物种对 PGM/CeO2-ZrO2 氧化烟尘的影响

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-09-11 DOI: 10.1093/bulcsj/uoae092

Hitoshi Kubo, Yusuke Ohshima, Shunsuke Kato, Noriyuki Saitoh, Noriko Yoshizawa, Osamu Nakagoe, Shuji Tanabe

{"title":"Effect of the Supported Metal Species on Soot Oxidation over PGM/CeO2–ZrO2","authors":"Hitoshi Kubo, Yusuke Ohshima, Shunsuke Kato, Noriyuki Saitoh, Noriko Yoshizawa, Osamu Nakagoe, Shuji Tanabe","doi":"10.1093/bulcsj/uoae092","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae092","url":null,"abstract":"The soot oxidation over platinum group metal oxide/CeO2–ZrO2 (PGM/CZ) catalysts with different ability to capture gas-phase oxygen has been studied herein. The ability to capture gas-phase oxygen was in sequence of Ru/CZ &gt; Rh/CZ &gt; Ir/CZ &gt; Pt/CZ &gt; Pd/CZ. Soot oxidation test by TG-DTA showed that Ru/CZ, Rh/CZ, and Ir/CZ are highly active catalysts. It was found that there is a good correlation between the ability to capture gas-phase oxygen and soot oxidation activity. TEM observation revealed that soot oxidation mainly occurs at the interface between soot and CZ surface. The Ea values and soot oxidation test using labeled oxygen suggested that highly active catalysts oxidize soot by CZ lattice oxygen. For Ir/CZ, soot oxidation at 270°C occurred due to the reduction by soot. Ru/CZ and Rh/CZ captured gas-phase oxygen spontaneously below 250°C, resulting in soot oxidation at 270°C. H2-TPR results suggested that the reactivity of lattice oxygen in CZ surface improved by PGM is also related to soot oxidation activity. It was suggested that the ability to capture gas-phase oxygen and the reactivity of lattice oxygen in CZ surface determine the soot oxidation activity, and that Ru, Rh, and Ir have the effect of enhancing these properties.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"7 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186102","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}

引用次数: 0

Design of Cyborg Proteins by Loop Region Replacement with Oligo(ethylene glycol): Exploring Suitable Mutations for Cyborg Protein Construction Using Machine Learning 用寡聚（乙二醇）取代环区设计半机械蛋白质：利用机器学习探索构建半机械蛋白质的合适突变

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-09-02 DOI: 10.1093/bulcsj/uoae090

Wijak Yospanya, Akari Matsumura, Yukihiro Imasato, Tomoyuki Itou, Yusuke Aoki, Hikaru Nakazawa, Takashi Matsui, Takeshi Yokoyama, Mihoko Ui, Mitsuo Umetsu, Satoru Nagatoishi, Kouhei Tsumoto, Yoshikazu Tanaka, Kazushi Kinbara

{"title":"Design of Cyborg Proteins by Loop Region Replacement with Oligo(ethylene glycol): Exploring Suitable Mutations for Cyborg Protein Construction Using Machine Learning","authors":"Wijak Yospanya, Akari Matsumura, Yukihiro Imasato, Tomoyuki Itou, Yusuke Aoki, Hikaru Nakazawa, Takashi Matsui, Takeshi Yokoyama, Mihoko Ui, Mitsuo Umetsu, Satoru Nagatoishi, Kouhei Tsumoto, Yoshikazu Tanaka, Kazushi Kinbara","doi":"10.1093/bulcsj/uoae090","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae090","url":null,"abstract":"We synthesized a “cyborg protein,” wherein a synthetic molecule partially substitutes the main peptide chain by linking two protein domains with a synthetic oligomer. Green fluorescent protein (GFP) served as the model for constructing the cyborg proteins. We prepared circularly permuted GFP (cpGFP) with new termini between β10 and β11, where the original N- and C-termini were linked by a cleavable peptide loop. The cyborg GFP was constructed from cpGFP by linking the β10 and β11 with oligo(ethylene glycol) using maleimide-cysteine couplings, followed by the enzymatic cleavage of the N- and C-termini linking loop by thrombin. With the help of machine learning, we were able to obtain the cpGFP mutants that significantly alter the fluorescence activity (53% increase) by thrombin treatment, which splits cpGFP into two fragments (fragmented-GFP), and by heat shock. When the cyborg GFP was constructed using this mutant, the fluorescence intensity increased by 13% after heat treatment, similar to cpGFP (33% increase), and the behavior was significantly different from that of the fragmented-GFP. This result suggests the possibility that the oligo(ethylene glycol) chain in the cyborg protein plays a similar role to the peptide in the main chain of the protein.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"37 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186104","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}

引用次数: 0

Purification and Tailored Functionalities in Detonation Nanodiamond 引爆纳米金刚石的纯化和定制功能

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-08-24 DOI: 10.1093/bulcsj/uoae089

Lutfia Isna Ardhayanti, Islam Md Saidul, Ze Cai, Masahiro Fukuzaki, Xinyao Liu, Zhongyue Zhang, Yoshihiro Sekine, Shinya Hayami

{"title":"Purification and Tailored Functionalities in Detonation Nanodiamond","authors":"Lutfia Isna Ardhayanti, Islam Md Saidul, Ze Cai, Masahiro Fukuzaki, Xinyao Liu, Zhongyue Zhang, Yoshihiro Sekine, Shinya Hayami","doi":"10.1093/bulcsj/uoae089","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae089","url":null,"abstract":"Nanodiamonds (NDs) offer immense potential in various fields, but graphitic or metal-based impurities hinder their widespread adoption. Conventional purification methods often employ harsh chemicals or high temperatures, raising concerns about ND integrity and surface properties. Herein, we compared various strategies to purify and tailor the surface functional groups in the detonation-derived nanodiamonds. A facile two-step purification strategy combining salt-assisted air oxidation (SAAO) and Fenton chemistry is particularly interesting for efficient and selective removal of graphitic impurities while preserving the diamond lattice structure. SAAO selectively burns off graphitic impurities at 450 °C under controlled oxygen flow, minimizing damage to the diamond core. Subsequently, Fenton's reagent (H2O2/Fe2+) introduces hydrophilic functional groups onto the ND surface, further enhancing diamond purity and promoting subsequent functionalization. This synergistic approach enables i) highly efficient removal of graphitic impurities while preserving ND morphology and crystal structure, ii) controlled introduction of surface functionalities, and iii) improved colloidal stability of purified NDs. This green and efficient purification protocol is beneficial for tailoring ND properties and unlocking their full potential in diverse applications ranging from biomedicine and electronics to catalysis and quantum technologies.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"69 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186106","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}

引用次数: 0