Article
Metallurgy & Metallurgical Engineering
Istvan B. Illes, Tamas Kekesi
Summary: This study theoretically considered and experimentally examined the possibility and main characteristics of using cementation to recover indium from aqueous chloride and sulphate solutions. Aluminium and zinc in plate and powder forms were tested as reducing agents. It was found that indium could be best cemented on Al or Zn surfaces in chloride solutions. While zinc plate proved to be inefficient, Zn powder performed well. Both Al plate and powder worked well, resulting in almost complete indium recoveries within 10-60 minutes depending on solution pH and temperature. The produced sponge could be easily detached from the Al plate and melted efficiently under protective atmosphere, vacuum, or salt flux. The purity of the produced sponges generally exceeded 99.9%, with cementation on Al plate producing the purest indium.
Article
Chemistry, Physical
Bowen Deng, Hui Song, Qi Wang, Jianan Hong, Shuang Song, Yanwei Zhang, Kang Peng, Hongwei Zhang, Tetsuya Kako, Jinhua Ye
Summary: A Ru/In2O3 catalyst is reported for efficient and stable photothermal CH3OH production from CO2 hydrogenation under atmospheric pressure. The catalyst demonstrates a remarkable solar CH3OH production, which is more than 50 times higher than that of pure In2O3 and surpasses other reported In2O3-based photothermal catalysts. Detailed characterizations show that the interaction between Ru and In2O3 enhances the activation of CO2 and H-2, and Ru modulates the electronic structure of In2O3, promoting the generation of oxygen vacancies for CH3OH formation. This work provides a rational design approach for efficient catalysts in solar CH3OH production from CO2 hydrogenation under mild conditions.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Zhaoming Xia, Yue Yin, Jun Li, Hai Xiao
Summary: Due to limited degrees of freedom, stable single-atom catalysts (SACs) often have one energetically lower structure that dominates over other high-energy metastable structures. However, our experiments with SACs anchored on CeO2 reveal that the high-energy metastable structures, although in much lower proportion than the dominant lowest-energy structure, can greatly influence catalysis due to their unique coordination environment and oxidation state. This discovery challenges the common assumption in SAC studies and calls for new developments to explore and exploit catalysis via high-energy metastable structures.
Article
Polymer Science
Mohammed Ali Al Assiri, Eric Gomez Urreizti, Carlo Andrea Pagnacco, Estibaliz Gonzalez de San Roman, Fabienne Barroso-Bujans
Summary: B(C6F5)3 is a strong electrophilic catalyst that promotes the ring-opening polymerization of various epoxides. This synthetic route is a viable strategy for the generation of cyclic polyethers. A systematic study on the polymerization of glycidol with B(C6F5)3 revealed an abrupt chain growth at high monomer conversions. The formation of branched cyclic polyglycidols was observed, which exhibited lower glass transition temperatures compared to linear polyglycidols.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Hao Sun, Zhenlin Wang, Chen Wang, Yunhang Shao, Yaning Zhang, Chaofeng Chen, Hongyan Liu, Shuai Dou, Jing Xu, Ying Zhang, Yang Lou, Jiawei Zhang, Fatang Li, Yongfa Zhu, Chengsi Pan
Summary: Efficient removal of ofloxacin is achieved in the Bi12CoO20/persulfate photothermal system. The photothermal activation greatly enhances the degradation rate of ofloxacin compared to traditional methods.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Rajeshwer Vanjari, Deepanjan Panda, Shaswati Mandal, Ganga B. Vamisetti, Ashraf Brik
Summary: In this study, a novel method for the Au(I)-mediated cyclization of unprotected peptides was proposed. The method involves the rapid addition of an amine on a propargyl group to generate an imine linkage for the synthesis of cyclic peptides. The results demonstrate the successful synthesis of over 35 diverse cyclic peptides with different sequences and lengths, as well as the stereoselective reduction of cyclic imines.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Rajeshwer Vanjari, Emad Eid, Ganga B. Vamisetti, Shaswati Mandal, Ashraf Brik
Summary: This study describes a rapid and efficient cyclization of unprotected N-propargylated peptides using Au(I) organometallic complex. By activating the propargyl functionality to form a new linkage with the N-terminus amine, the method enables cyclization of peptides with different sequences, resulting in high yields of cyclic peptides.
ACS CENTRAL SCIENCE
(2021)
Article
Chemistry, Physical
Chatura Goonesinghe, Hyuk-Joon Jung, Hootan Roshandel, Carlos Diaz, Hassan A. Baalbaki, Kudzanai Nyamayaro, Maria Ezhova, Kimia Hosseini, Parisa Mehrkhodavandi
Summary: The synthesis of high-molecular-weight cyclic poly(lactide) (c-PLA) has been a challenge due to entropic constraints. This study successfully produced c-PLA with low dispersity and high molecular weights using an air-stable cationic alkyl indium complex. The complex remained active even after prolonged exposure to high-humidity air, allowing the formation of high-molecular-weight c-PLLA, c-PDLA, and their stereo-complex without epimerization.
Article
Chemistry, Physical
L. J. Zhang, J. C. Yuan, L. J. Ma, Z. Y. Tang, X. M. Zhang
Summary: In this study, a highly efficient synthetic method for (E)-b-vinylboronates using PCN-222 as a catalyst was developed, achieving high TOF value and specific selectivity in the hydroboration reaction. The synergistic effect of central Cu(II) ions, N atoms of porphyrin rings, and terminal -OH groups on Zr-nodes played a key role in the process, as revealed by density functional theory (DFT) study.
JOURNAL OF CATALYSIS
(2021)
Article
Nanoscience & Nanotechnology
Kun Liang, Dingwei Li, Huihui Ren, Momo Zhao, Hong Wang, Mengfan Ding, Guangwei Xu, Xiaolong Zhao, Shibing Long, Siyuan Zhu, Pei Sheng, Wenbin Li, Xiao Lin, Bowen Zhu
Summary: Metal oxide thin-films transistors (TFTs) produced from solution-based printing techniques can lead to large-area electronics with low cost. Through reducing the film thickness down to nanometers scale, ITO can be used as active channels in transistors, exhibiting high performance and stability. Fully printed n-type metal-oxide-semiconductor (NMOS) inverters based on ITO TFTs show extremely high gain, promising for advanced electronics applications.
NANO-MICRO LETTERS
(2021)
Article
Chemistry, Physical
Chao Meng, Guofeng Zhao, Xue-Rong Shi, Qiang Nie, Ye Liu, Yong Lu
Summary: Carbon neutrality has brought worldwide attention to the exploration of CO2 hydrogenation to methanol, with the need for groundbreaking catalysts. A highly efficient InNi3C0.5/Fe3O4 catalyst was developed by finely tuning the electronic metal-support interaction (EMSI) using Fe3O4 precursor. The catalyst achieved a significantly higher turnover frequency compared to other Fe3O4 precursors, indicating the correlation between oxygen deficiency and EMSI-governed activity. Enhanced EMSI made the catalyst more electron-enriched, allowing easy dissociation of CO2. The InNi3C0.5/Fe3O4-N catalyst showed excellent performance in terms of methanol space time yield, selectivity, and resistance to sintering and sulfur poisoning.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Chemical
Yangyang Fan, Yan Liu, Liping Niu, Weiguang Zhang, Ting-an Zhang
Summary: This study proposed a closed-loop hydrometallurgical process for indium recovery from waste ITO targets, achieving high indium recovery and recirculation of leaching reagent. By implementing experiments and models, successful indium recovery, selective precipitation of tin, and preparation of indium oxide product were achieved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Shusuke Ochi, Zining Zhang, Ying Xia, Guangbin Dong
Summary: In this study, a unique one-carbon ring-expansion strategy was developed to synthesize multi-substituted 2-indanones from benzocyclobutenones and styrene-type olefins. The use of a cationic ligandless rhodium catalyst enabled high reactivity and selectivity towards the (4+1) product. The method exhibited broad functional group tolerance and scalability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Peng Wu, Yang Gu, Langxing Liao, Yanfei Wu, Jiaoyu Jin, Zhanfeng Wang, Jiahai Zhou, Sason Shaik, Binju Wang
Summary: A coordination switch of the sulfoxide intermediate is involved in the catalysis of non-heme iron EgtB, driven by S/pi electrostatic interactions, which efficiently promotes selective C-S bond formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Wenzheng Fan, Xueyao Zhao, Yunshun Deng, Pinhong Chen, Fei Wang, Guosheng Liu
Summary: A highly efficient and sustainable method for enantioselective benzylic C-H cyanation has been reported by merging electrophoto-and copper catalysis. The novel catalytic system allows independent regulation of key steps to achieve high selectivity, suitable for enantioselective benzylic C-H cyanation of diverse alkylarenes and late-stage functionalization of bioactive molecules.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Samara Medina Rivero, Rui Shang, Hiroyoshi Hamada, Qifan Yan, Hayato Tsuji, Eiichi Nakamura, Juan Casado
Summary: The study focused on electron acceptor and donor spiro-conjugated dimers based on specific compounds, investigating the existence of SOMO-HOMO energy level inversion through the radical forms of charged species. The results showed non-Aufbau energy properties in certain radical ions, attributed to spiro-conjugation and electron-electron repulsion effects.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Chemistry, Multidisciplinary
Hyuna Jo, Takashi Kitao, Ayumi Kimura, Yoshimitsu Itoh, Takuzo Aida, Kou Okuro
Summary: This study presents a bio-adhesive porous organic module composed of hexagonally packed 1D nanopores based on a covalent organic framework. The module strongly adheres to biopolymers through salt-bridging interactions and can release guest molecules through selective interactions with reporter chemicals. Utilizing a gating component, calmodulin, the researchers demonstrate the controlled release of a loaded guest molecule from the nanopores through specific interactions with Ca2+ ions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Michihisa Ueda, Tsubasa Aoki, Takayoshi Akiyama, Takayuki Nakamuro, Keitaro Yamashita, Haruaki Yanagisawa, Osamu Nureki, Masahide Kikkawa, Eiichi Nakamura, Takuzo Aida, Yoshimitsu Itoh
Summary: In this study, a novel nonplanar-core monomer was used for polymerization, resulting in the formation of an alternating heterochiral supramolecular copolymer. The heterochiral copolymer displayed an alternating arrangement of H-bonded and polar p-stacked parts, which was found to be due to the effective cancellation of in-plane dipole moments between two thiophene amide moieties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Yuta Fujisawa, Atsushi Asano, Yoshimitsu Itoh, Takuzo Aida
Summary: The study found that the mechanically robust polymer material PTUEG(3) can self-heal at ambient temperatures, but loses its mechanical strength when it absorbs water and is plasticized under high humidity. By copolymerizing PTUEG(3) with Cy2M thiourea unit, a humidity-tolerant and mechanically robust polymer material that can self-heal was developed.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Katsuhiro Isozaki, Ryo Ueno, Kosuke Ishibashi, Genta Nakano, Haozhi Yin, Kenta Iseri, Masanori Sakamoto, Hikaru Takaya, Toshiharu Teranishi, Masaharu Nakamura
Summary: This study describes the synthesis of gold nanoclusters functionalized by peptide dendron thiolate ligands to form a hydrogen bonding supramolecular reaction field. The prepared nanoclusters act as efficient photocatalysts for oxidative cyclization, with dynamic transformation of hydrogen bonds between ligands playing a key role in accelerating the reaction. The concept introduced in this work allows for tuning reactivities and selectivities of metal nanocluster catalysts using supramolecular reaction fields created with dendritic thiolate ligands.
Review
Chemistry, Multidisciplinary
Hayato Tsuji
Summary: Carbon-bridged oligo(phenylenevinylene)s (COPVs) have a rigid planar molecular structure, excellent functionality and high stability, and exhibit phenomena at room temperature that conventional molecules only show at cryogenic temperatures.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Multidisciplinary
Xu-Jie Zhang, Daiki Morishita, Tsubasa Aoki, Yoshimitsu Itoh, Keiichi Yano, Fumito Araoka, Takuzo Aida
Summary: In this study, an anomalous chiral transfer from a chiral medium to a supramolecular polymer was observed during the polymerization process of a tetraphenylporphyrin-based achiral monomer. The anomalous chiroptical amplification in CD was attributed to the change in the stacking geometry of the monomer in the supramolecular polymer.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Tsubasa Aoki, Michihisa Ueda, Takuzo Aida, Yoshimitsu Itoh
Summary: Using a photochemically fluttering thiophene-fused cyclooctatetraene derivative as a nonplanar chiral monomer, a new strategy was developed to suspend supramolecular polymerization by controlling the fluttering motion, leading to depolymerization.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Yoshimitsu Itoh, Shuo Chen, Ryota Hirahara, Takeshi Konda, Tsubasa Aoki, Takumi Ueda, Ichio Shimada, James J. Cannon, Cheng Shao, Junichiro Shiomi, Kazuhito Tabata, Hiroyuki Noji, Kohei Sato, Takuzo Aida
Summary: This study reports a novel fluorous nanochannel that exhibits a water permeation flux two orders of magnitude higher than that of aquaporins and carbon nanotubes. The hydrophobic interior surface of this nanochannel provides a powerful electrostatic barrier, resulting in nearly perfect salt reflectance. Hence, it holds significant potential for applications in desalination.
Article
Chemistry, Organic
Keisuke Iwata, Yasunobu Egawa, Katsunori Yamanishi, Hayato Tsuji
Summary: The acid-induced intramolecular cyclization of 1,1-disubstituted 3-aryl-2,3-dibromoallylalcohols leads to the formation of 2,3-dibromo-1H-indene derivatives and tetrabromodihydro-s-indacenes. These multi-brominated compounds can serve as versatile building blocks for the synthesis of various indene and indacene derivatives. The synthesis of dialkylmethylene-bridged oligo(phenylenevinylene)s demonstrates the attractive photophysical properties of these compounds.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yuta Fujisawa, Yiling Nan, Atsushi Asano, Yu Yanagisawa, Keiichi Yano, Yoshimitsu Itoh, Takuzo Aida
Summary: This study investigates the fundamental aspect of making commodity polymers healable by blending with self-healable polymers. The researchers found that a polymer blend of poly(ether thiourea) and poly(octamethylene thiourea) can self-heal within a certain temperature range, even with a low content of poly(ether thiourea).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Stef A. H. Jansen, Elisabeth Weyandt, Tsubasa Aoki, Takayoshi Akiyama, Yoshimitsu Itoh, Ghislaine Vantomme, Takuzo Aida, E. W. Meijer
Summary: Complexity in supramolecular polymer systems is caused by interactions between different components, including solvent molecules. This study reveals that both thermally bisignate and dilution-induced assembly phenomena in multicomponent systems are driven by the same underlying interaction mechanism. By investigating the interaction between amide-decorated supramolecular polymers and aliphatic alcohols, the temperature-dependency and dominance of the interaction at high monomer concentrations were unveiled. These insights allow for the control and manipulation of supramolecular polymer systems, opening the door to building complex and functional structures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Hayato Tsuji, Masaki Nakahata, Mafumi Hishida, Hideki Seto, Ryuhei Motokawa, Takeru Inoue, Yasunobu Egawa
Summary: This study investigates the aggregation behavior of hydrophobic solutes in water-THF solution and the role of THF. A model is proposed based on experimental results, suggesting that hydrophobic solutes are molecularly dispersed in the low-water-content region and form mesoscopic particles upon increasing the water fraction.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Hayato Tsuji, Akihiro Shitomi, Naoto Hamaguchi, Yasunobu Egawa, Victor Bonal, Pedro G. Boj, Jose M. Villalvilla, Jose A. Quintana, Maria A. Diaz-Garcia
Summary: A naphtho[2,1-b:6,5-b ']difuran derivative has been identified as an effective violet-emitting laser dye, showing amplified spontaneous emission at 413 nm in polystyrene film. Lasing was also demonstrated using all-polymeric distributed-feedback lasers emitting at 411-417 nm.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Takeru Inoue, Makoto Tsurui, Hiroshi Yamagishi, Yuma Nakazawa, Naoto Hamaguchi, Shoya Watanabe, Yuichi Kitagawa, Yasuchika Hasegawa, Yohei Yamamoto, Hayato Tsuji
Summary: In this study, donor-acceptor-donor conjugates were synthesized and found to serve as efficient and stable long-wavelength photoluminescent dyes in organic and aqueous media. Specifically, Cz-COPV2-BBTz-COPV2-Cz showed high photoluminescence quantum yield in the near-infrared region.