Bulletin of the Chemical Society of Japan最新文献_第3页

Step-growth irreversible deactivation radical polymerization: synergistic developments with chain-growth reversible deactivation radical polymerization 阶跃生长不可逆失活自由基聚合：与链式生长可逆失活自由基聚合的协同发展

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-17 DOI: 10.1093/bulcsj/uoae069

Masami Kamigaito

{"title":"Step-growth irreversible deactivation radical polymerization: synergistic developments with chain-growth reversible deactivation radical polymerization","authors":"Masami Kamigaito","doi":"10.1093/bulcsj/uoae069","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae069","url":null,"abstract":"Recent advances in chain-growth reversible deactivation radical polymerization (CG-RDRP), i.e. the so-called “living radical polymerization”, have synergistically developed step-growth radical polymerizations via controlled formation of radical species from covalent bonds followed by irreversible deactivation of the resulting radical species. The monomers for radical polyaddition are thus designed to possess carbon–halogen or thioester bonds, which can generate radical species in the presence of transition metal catalysts and radical initiators, as well as carbon‒carbon double bonds, which will irreversibly form carbon–halogen or thioester bonds. Radical polycondensations are achievable via radical coupling reactions of carbon-centered radicals generated from carbon–halogen bonds or radical quenching reactions with nitroxides. Furthermore, radical addition-condensation polymerizations are achieved by a sequence of reactions, i.e. the formation of radical species from carbon–halogen bonds, radical addition to nitroso or thiocarbonylthio compounds, and coupling or quenching reactions with the resulting stable radical. These step-growth irreversible deactivation radical polymerizations (SG-IDRP) enable the synthesis of a variety of polymers, such as polyethers, polyesters, polyamides, and polyimides, which have aliphatic, aromatic, polar, and degradable groups in their main chains. Sequence-regulated vinyl polymer structures can also be constructed by designing monomers. Combinations with CG-RDRPs further lead to unique hybrid block, multiblock, graft, hyperbranched, and network polymers.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"17 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141744753","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

A Layered Titanate Nanowire Helps Pt/TiO2 Photocatalyst for Solar Hydrogen Evolution from Water with High Quantum Efficiency 层状钛酸盐纳米线帮助 Pt/TiO2 光催化剂实现高量子效率的太阳能水氢转化

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-16 DOI: 10.1093/bulcsj/uoae079

Rafat Tahawy, Mohamed Esmat, Hamza El-Hosainy, Fatma E Farghaly, El-Sayed A Abdel-Aal, F I El-Hosiny, Yusuke Ide

{"title":"A Layered Titanate Nanowire Helps Pt/TiO2 Photocatalyst for Solar Hydrogen Evolution from Water with High Quantum Efficiency","authors":"Rafat Tahawy, Mohamed Esmat, Hamza El-Hosainy, Fatma E Farghaly, El-Sayed A Abdel-Aal, F I El-Hosiny, Yusuke Ide","doi":"10.1093/bulcsj/uoae079","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae079","url":null,"abstract":"Research into TiO2 photocatalysts for solar H2 evolution from water is still growing for environmentally benign and economically valid H2 production. Herein, in contrast to many researches on the modification of TiO2 toward higher photocatalytic activities, we develop a photocatalytically inactive TiO2-based nanostructure and use it, like graphene, as a booster of a benchmark TiO2. A layered potassium titanate with two-dimensional plate-like particle morphology was converted to the corresponding one-dimensional nanowire form via a hydrothermal reaction, after which the layered potassium titanate nanowire was acid-treated to obtain a layered titanate nanowire. This nanowire was completely inactive toward H2 evolution from water containing methanol under solar simulator irradiation. However, when Pt nanoparticle-loaded P25 TiO2 (Pt/P25) was mixed with a considerably smaller amount of the layered titanate nanowire in water, a durable composite was obtained and the composite showed a good photocatalytic activity three times higher than Pt/P25. The apparent quantum efficiency of the reaction at wavelength of 350 nm was 56%, which was higher than or comparable to those of the state-of-the-art TiO2-based photocatalysts. The possible reason for the enhanced photocatalytic activity of the Pt/P25 and layered titanate nanowire composite involved the transfer of photogenerated holes from Pt/P25 to the nanowire to suppress charge recombination and/or disaggregation (improved dispersion) of Pt/P25 particles on the nanowire.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"26 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141721366","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

Assembly/Disassembly Control of Gold Nanorods with Uniform Orientation on Anionic Polymer Brush Substrates 在阴离子聚合物刷基底上组装/拆卸方向一致的金纳米棒的控制方法

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-12 DOI: 10.1093/bulcsj/uoae073

Jingyan Yang, Yu Sekizawa, Xu Shi, Kuniharu Ijiro, Hideyuki Mitomo

{"title":"Assembly/Disassembly Control of Gold Nanorods with Uniform Orientation on Anionic Polymer Brush Substrates","authors":"Jingyan Yang, Yu Sekizawa, Xu Shi, Kuniharu Ijiro, Hideyuki Mitomo","doi":"10.1093/bulcsj/uoae073","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae073","url":null,"abstract":"Sophisticated control of the spatial arrangement of gold nanorods provides significant advantages in the design of plasmonic systems. However, dynamic modulation of the gold nanorod spatial arrangements remains challenging. Here, we present a novel strategy for dynamic control of thermo-responsive gold nanorods with uniform alignment on a solid substrate using polymer brushes. In this system, cationic-thermo-responsive gold nanorods were immobilized into anionic polymer brushes via moderate electrostatic interactions, providing vertically aligned gold nanorod arrays. Upon heating, the gold nanorods were assembled while maintaining their vertical orientation within the polymer brushes. They returned to the original state upon cooling, indicating reversible assembly/disassembly. It is noticeable that this system exhibits rapid changes in nanostructure arrangement even when immobilized in the polymer brush substrate on a solid substrate rather than those dispersed in solution. Importantly, the gold nanorods showed good adhesion stability in polymer brushes without any significant detachment during washing and thermal cycling processes, but performed assembly formation even at largely separated conditions, indicating the traveling of considerable distances similar to the lateral diffusion of membrane proteins in cell membranes. In addition to providing unprecedented control over gold nanorod spatial configurations, our approach introduces a versatile platform for developing advanced plasmonic devices.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"29 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613951","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

Three-type Precursors for Low-Temperature Solution-Processed Void-and-Crack-Free CuI Films: Comparison of Electrical Conductivities and Optical Transparency 低温溶液加工的无空隙无裂缝 CuI 薄膜的三种前驱体：导电性和光学透明度的比较

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-11 DOI: 10.1093/bulcsj/uoae071

Manabu Ishizaki, Naoki Koya, Yoshitomo Gotoh, Kodai Muramatsu, Masato Kurihara

{"title":"Three-type Precursors for Low-Temperature Solution-Processed Void-and-Crack-Free CuI Films: Comparison of Electrical Conductivities and Optical Transparency","authors":"Manabu Ishizaki, Naoki Koya, Yoshitomo Gotoh, Kodai Muramatsu, Masato Kurihara","doi":"10.1093/bulcsj/uoae071","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae071","url":null,"abstract":"Copper iodide (CuI) is a wide-bandgap (colorless) p-type semiconductor with a high Seebeck coefficient. Although CuI is promising for fabricating transparent thermoelectric devices and hole-transfer layers of solar cells, the insolubility in common solvents due to 3-dimensional coordination networks has been a drawback to constructing low-temperature solution-processed thin films. Moreover, it is challenging to fabricate void-and-crack-free CuI thin films through a convenient spin-coating process. In limited solvents of acetonitrile and diethyl sulfide, CuI is dissolved by forming soluble CuI complexes; however, void-and-crack-free CuI thin films have never been prepared. In this study, we report that CuI-alkanolamine complexes are soluble in alcohols and the spin-coated complexes undergo thermal decomposition to a CuI thin film at moderately low temperatures until 150 °C. We discover that the CuI-alkanolamines show different properties such as solubility and melting/decomposition temperatures depending on their structures. Specifically, by using 1-amino-2-propanol, we obtain void-and-crack-free and transparent CuI thin films with controlled thicknesses of &gt;50 nm. The conductivity, carrier density, mobility, and Seebeck coefficient of the CuI thin film are 9.35 S·cm-1, 6.38×1019 cm-3, 0.96 cm2·V-1·S-1, and 192 µV･K-1, respectively.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"22 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141613949","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

Development of Nitrogen-doped Carbon Supported Metal Catalysts for Green Organic Synthesis 开发用于绿色有机合成的掺氮碳支撑金属催化剂

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-11 DOI: 10.1093/bulcsj/uoae076

Tomohiro Yasukawa

引用次数: 0

Structure-Activity Relationship Studies on Iezoside, a Highly Potent Ca2+ ATPase Inhibitor 强效 Ca2+ ATP 酶抑制剂 Iezoside 的结构-活性关系研究

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-06 DOI: 10.1093/bulcsj/uoae070

Naoaki Kurisawa, Kazuya Teranuma, Akari Noto, Arihiro Iwasaki, Yoshiki Kabashima, Rie Nakajima, Chikashi Toyoshima, Kiyotake Suenaga

引用次数: 0

Discrete Polyketones: Synthesis, Derivatization, and Potential Applications 离散多酮类化合物：合成、衍生和潜在应用

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-07-04 DOI: 10.1093/bulcsj/uoae072

Yasuhide Inokuma

{"title":"Discrete Polyketones: Synthesis, Derivatization, and Potential Applications","authors":"Yasuhide Inokuma","doi":"10.1093/bulcsj/uoae072","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae072","url":null,"abstract":"The present account reviews recent progress in the synthesis, functionalization, and application of discrete polyketones. Whereas most polyketones are synthesized as polydisperse polymers with various molecular chain lengths and sizes, discrete polyketones are obtained in chemically pure forms. This allows precise structural analysis using NMR and X-ray diffraction. Discrete polyketones have been used to determine the critical chain length that distinguishes the crystallization behaviors of small molecules from those of macromolecules. Calix[3]pyrrole, which is a ring-contracted analogue of porphyrinogen, was first obtained from a cyclic hexaketone. The discovery of the strain-induced ring expansion reaction of calix[3]pyrroles has provided an important insight into solving a long-standing enigma in porphyrin synthesis. Chemical derivatization of discrete polyketones using ketone-derived transformations has resulted in the generation of various functional molecules for potential applications. These molecules have been used to develop several materials, including luminescent chromophores, ion adsorbents, drug–drug conjugates, and microfluidic devices for cancer diagnosis.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"14 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141548439","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

Preparation of biomass carbon dots/carboxymethyl cellulose-based fluorescent hydrogel: combines selective detection and visual adsorption for Copper(II) 生物质碳点/羧甲基纤维素基荧光水凝胶的制备：结合选择性检测和视觉吸附铜（II）

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-05-28 DOI: 10.1093/bulcsj/uoae054

Sijie Liang, Huixia Feng, Nali Chen, Bin Wang, Mengyu Hu, Xiaoxue Huang, Kai Yang, Yiming Gu

{"title":"Preparation of biomass carbon dots/carboxymethyl cellulose-based fluorescent hydrogel: combines selective detection and visual adsorption for Copper(II)","authors":"Sijie Liang, Huixia Feng, Nali Chen, Bin Wang, Mengyu Hu, Xiaoxue Huang, Kai Yang, Yiming Gu","doi":"10.1093/bulcsj/uoae054","DOIUrl":"https://doi.org/10.1093/bulcsj/uoae054","url":null,"abstract":"Abstract In this study, we used nitrogen-doped carbon dots (NCDs), which were synthesized via the hydrothermal method of corn-stover biomass as raw material and polyethyleneimine as the nitrogen source, introduced them into the carboxymethyl cellulose (CMC)-based hydrogel to prepare an environmentally friendly fluorescent cellulose-based hydrogel (NCDs/CMC-PAM). NCDs/CMC-PAM was also used for simultaneous fluorescence monitoring and removal of Cu (II) in aqueous solution. The chemical and physical structures, adsorption behaviors and fluorescent properties of NCDs/CMC-PAM were investigated. The results showed that NCDs/CMC-PAM exhibited a well-linear response range of fluorescence response for Cu (II) (0∼100 μM, detection limit of 3.42 μM). NCDs/CMC-PAM showed maximum adsorption capacities of 237.71 mg/g for Cu (II), the adsorption process followed the Langmuir isotherm model and pseudo-second-order kinetic model, which is an exothermic spontaneous reaction with an increase in entropy. It can still maintain 79.03% of the original adsorption capacity after six cycles (pH = 6). The adsorption mechanisms of NCDs/CMC-PAM for Cu (II) are intraparticle diffusion, electrostatic attraction, ion exchange, and ligand interaction. Hence, the present study provides a new green way to synthesize an adsorbent that can be applied for the adsorption and detection of heavy metal ions.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"97 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147887695","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: 17

Genetic disruption of dopamine β-hydroxylase dysregulates innate responses to predator odor in mice. 基因干扰多巴胺β-羟化酶会导致小鼠对捕食者气味的先天反应失调。

3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-01-27 DOI: 10.1101/2023.06.21.545975

Joyce Liu, Daniel J Lustberg, Abigail Galvez, L Cameron Liles, Katharine E McCann, David Weinshenker

{"title":"Genetic disruption of dopamine β-hydroxylase dysregulates innate responses to predator odor in mice.","authors":"Joyce Liu, Daniel J Lustberg, Abigail Galvez, L Cameron Liles, Katharine E McCann, David Weinshenker","doi":"10.1101/2023.06.21.545975","DOIUrl":"10.1101/2023.06.21.545975","url":null,"abstract":"In rodents, exposure to predator odors such as cat urine acts as a severe stressor that engages innate defensive behaviors critical for survival in the wild. The neurotransmitters norepinephrine (NE) and dopamine (DA) modulate anxiety and predator odor responses, and we have shown previously that dopamine β-hydroxylase knockout (Dbh -/-), which reduces NE and increases DA in mouse noradrenergic neurons, disrupts innate behaviors in response to mild stressors such as novelty. We examined the consequences of Dbh knockout (Dbh -/-) on responses to predator odor (bobcat urine) and compared them to Dbh-competent littermate controls. Over the first 10 min of predator odor exposure, controls exhibited robust defensive burying behavior, whereas Dbh -/- mice showed high levels of grooming. Defensive burying was potently suppressed in controls by drugs that reduce NE transmission, while excessive grooming in Dbh -/- mice was blocked by DA receptor antagonism. In response to a cotton square scented with a novel \"neutral\" odor (lavender), most control mice shredded the material, built a nest, and fell asleep within 90 min. Dbh -/- mice failed to shred the lavender-scented nestlet, but still fell asleep. In contrast, controls sustained high levels of arousal throughout the predator odor test and did not build nests, while Dbh -/- mice were asleep by the 90-min time point, often in shredded bobcat urine-soaked nesting material. Compared with controls exposed to predator odor, Dbh -/- mice demonstrated decreased c-fos induction in the anterior cingulate cortex, lateral septum, periaqueductal gray, and bed nucleus of the stria terminalis, but increased c-fos in the locus coeruleus and medial amygdala. These data indicate that relative ratios of central NE and DA signaling coordinate the type and valence of responses to predator odor.","PeriodicalId":9511,"journal":{"name":"Bulletin of the Chemical Society of Japan","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10793432/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88774644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Vapor-phase Dehydrogenation of 3-Methyl-2-butanol over Silica-supported Cu Catalyst Prepared by Mannitol-assisted Impregnation 通过甘露醇辅助浸渍法制备的二氧化硅支撑铜催化剂上的 3-甲基-2-丁醇气相脱氢反应

IF 4 3区化学

Bulletin of the Chemical Society of Japan Pub Date : 2024-01-10 DOI: 10.1093/bulcsj/uoae001

Koki Sato, Enggah Kurniawan, Shun Sasaki, Kenta Matsusaka, Yasuhiro Yamada, Satoshi Sato

引用次数: 0