Article
Chemistry, Physical
Yuan Wen, Ruifang Nie, Bo Li, Suhua Li
Summary: A simple and efficient catalytic system for the direct carbonylation-polymerization of epoxides to produce poly(3-hydroxyalkanoates) (PHAs) was reported. The system involves the in situ generation of a bifunctional cobalt catalyst and the use of a diphosphine oxide ligand WenPhos oxide. Mechanistic studies revealed that the reaction proceeds through the coordination of the phosphine oxide ligand with the cobalt cation and [Co(CO)4]- anion.
Article
Polymer Science
Miriam Scoti, Fabio De Stefano, Giorgia Zanchin, Giuseppe Leone, Claudio De Rosa, Giovanni Ricci
Summary: Poly(isoprene)s with various molecular structures and mechanical properties have been synthesized using different catalysts. The synthesized polymers include cis-1,4 structures, 3,4 syndiotactic structures, regular alternating cis-1,4-alt-3,4 structures, and structures with alternating cis-1,4-alt-3,4 but with different lengths of cis-1,4 sequences. The structure and properties of these polymers, including their crystallization behavior and glass transition temperatures, have been studied.
Article
Chemistry, Multidisciplinary
Eric C. Moinet, Olivier Tardif, Cacilia Maichle-Moessmer, Reiner Anwander
Summary: Discrete lanthanide(III) isobutylaluminates Ln[N(SiMe3)(2)](HAliBu(3))(AliBu(4)) (Ln = La, Pr, Nd) were synthesized from Ln[N(SiMe3)(2)](3) and triisobutylaluminium (TIBA). The reaction of Nd[N(SiMe3)(2)](HAliBu(3))(AliBu(4)) with crown ether formed the ion pair [Nd(18-c-6){N(SiMe3)(2)}(HAliBu(3))][AliBu(4)], showing a strong Nd-H interaction in the solid state. The equimolar reaction of La[N(SiMe3)(2)](HAliBu(3))(AliBu(4)) with fluorene resulted in the formation of [(mu-fluorenyl)(3)La-2(mu-H)(HAliBu(3))(2)] and (fluorenyl)(2)La[N(SiMe3)(2)]. The reported complexes are the first crystallographically characterized lanthanide(III) tetraisobutylaluminates without ancillary ligands, and they exhibit potential as model systems for Ziegler-type polymerization catalysis.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Binghui Chen, Dirong Gong
Summary: Cobalt dibromide supported by ortho-positioned alpha-diimine ligand with sulfur and oxygen donor has been synthesized and characterized. The oxygen donor is connected with the metal center, resulting in a triangle bipyramidal configuration. The catalysts formed with AlEt2Cl as an activator can efficiently catalyze butadiene polymerization with essential cis-1,4 chemoselectivity at low catalyst feeding. These catalysts are also more active and robust for isoprene polymerization, yielding polyisoprene rich in cis-1,4 fraction and randomly incorporating 3,4 units. The formed polymers have higher number average molecular weights compared to polybutadiene. The O-Me donor in the N-Aryl has a positive impact on the catalyst activity and molecular weight. The catalysts show stable chemoselectivity despite variations in activator, catalyst feeding, temperature, and catalyst structure.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Cheng-Hao Chu, Xiang-Rui Wang, Jiang-Sheng Huang, Ze-Ming Huang, Qing-Hai Li, Fen -Hua Wang
Summary: Rare-earth metal dialkyl complexes were synthesized via direct alkane elimination using a well-designed indolyl-based proligand and rare-earth metal trialkyl complexes. These complexes showed analogous mononuclear NCN-pincer geometry through C-H activation of 2-sp2 indole. When activated by aluminum alkyls and borate, the complexes exhibited high conversion and stereoselectivity in isoprene polymerization.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Polymer Science
Fen You, Xiaohui Kang, Masayoshi Nishiura, Jingjing Zhai, Suting Xu, Jixing Wang, Xiaochao Shi, Zhaomin Hou
Summary: This study reports the living and highly 3,4-isoselective polymerization of biobased monomer beta-farnesene using a phosphine-functionalized fluorenyl-ligated yttrium catalytic system. The coordination of the phosphine group plays a pivotal role in the regio- and stereoselectivity of the polymerization. Block copolymers with specific properties were successfully prepared. This research is important for reducing petrochemical dependency.
Article
Chemistry, Inorganic & Nuclear
Fen You, Jixing Wang, Hui Liu, Xiaohui Kang, Xiaochao Shi
Summary: A series of rare-earth metal bis(alkyl) complexes were synthesized through protonolysis reactions of tris(aminobenzyl) complexes with phosphine-functionalized amidinated ligands. These complexes showed high catalytic activity for the polymerization of 1,3-conjugated dienes, resulting in highly 3,4-regular polymers with high molecular weight and narrow molecular weight distribution. The coordination of the diphenylphosphine group to the central metal was observed, which may serve as the true active species in the 3,4-selective polymerization of 1,3-conjugated dienes according to 31P NMR spectra and DFT calculation results.
DALTON TRANSACTIONS
(2023)
Article
Polymer Science
Qingtao Niu, Manman Jin, Aihua He, Tielong Chen, Guodong Liu, Chongdian Si
Summary: External electron donors have significant effects on the stereoselectivity and catalytic activity of MgCl2-supported (TiCl4/MgCl2) Ziegler-Natta catalysts in the copolymerization of isoprene and butadiene. The introduction of alkoxysilane donors improves polymerization activity and trans-1,4 unit content, but excessive donors have negative effects. Additionally, increasing polymerization temperature enhances catalytic activity and stereoselectivity of the catalyst.
Article
Chemistry, Inorganic & Nuclear
Guo Li-Ping, Song Ren-Yuan
Summary: Rare-earth metal dialkyl complexes were prepared by cyclometalation reactions of N-Bn-3-imino-functionalized indolyl ligand, which initiated isoprene polymerization with high activity and regioselectivity in the presence of cocatalysts.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Hassan A. Baalbaki, Kudzanai Nyamayaro, Julia Shu, Chatura Goonesinghe, Hyuk-Joon Jung, Parisa Mehrkhodavandi
Summary: Aluminum, gallium, and indium complexes were studied as catalysts for the copolymerization of CO2 and cyclohexene oxide. The indium complex exhibited higher conversion and selectivity compared to the aluminum and gallium analogues. The mechanism of the reaction and an off-cycle catalytic intermediate involving indium were investigated through experiments and structural characterization.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Mengmeng Zhao, Xianhui Zhang, Ledong Wang, Liang Wang, Guangqian Zhu, Qinggang Wang
Summary: A series of iron(II) dichloride complexes (Fe1-Fe3) and iron(II) acetylacetonate complex (Fe4) bearing different oxazoline ligands were synthesized and showed excellent activity towards isoprene polymerization. The ligand environment and counter anion on iron center displayed significant effects on polymerization activity and selectivity. The possible polymerization mechanism was proposed.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Yuting Li, Yu Tang, Yixiao Li, Franklin Tao
Summary: The addition of Co, Mn, or Mo to Na2WO4 effectively enhances its catalytic activity and selectivity in the OCM process. X-ray spectroscopy studies demonstrate that these transition metals diffuse into the lattice of Na2WO4, leading to modification of its active phase.
Article
Chemistry, Inorganic & Nuclear
Fuming Tang, Dirong Gong
Summary: Cobalt complexes with different ligands were synthesized and characterized, with one of the complexes showing distorted trigonal bipyramid structure and good polymerization activity. These catalysts demonstrated high reactivity in the polymerization of isoprene and various substituted styrenes.
INORGANICA CHIMICA ACTA
(2022)
Article
Chemistry, Inorganic & Nuclear
Suting Xu, Yanchen Huo, Xiang Hu, Fei Wang, Li Pan, Xiaochao Shi
Summary: In this study, rare-earth metal complexes bearing tetrahydrofluorenyl ligands were synthesized and characterized. These complexes showed excellent catalytic activity for the polymerization of styrene and butadiene, resulting in diblock copolymers with highly syndiotactic polystyrene block and a 1,4-specific PBD block. The study also revealed the significant difference in reactivity ratios between butadiene and styrene, supporting the block structure of the copolymers. Morphology and mechanical properties of the selected diblock copolymer were investigated.
INORGANIC CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Jing An, Akihiko Ishii, Norio Nakata
Summary: Trichloro niobium(V) complexes 3 and 4 with sulfur- or selenium-bridged bis(phenolate) ligands were synthesized and characterized. Complex 4 exhibited a fac-fashion coordination of the [OSeO]-core to the niobium center in its crystalline state. Tribenzyl niobium(V) complexes 5 and 6 were prepared by the reactions of 3 and 4 with PhCH2MgCl. X-ray diffraction analysis showed that complex 6 had a distorted six-coordinated niobium center in a mer-fashion and one benzyl ligand coordinated in an eta(2)-fashion.
Article
Chemistry, Physical
Indranil Dutta, Nasser A. Alobaid, Fabio Lorenzo Menicucci, Priyanka Chakraborty, Chao Guan, Delong Han, Kuo-Wei Huang
Summary: The utilization of formic acid as a liquid organic hydrogen carrier has recently gained significant attention due to its desirable properties. In this study, a manganese complex [Mn(PN3P)(CO)2]Br was found to be an efficient catalyst for formic acid dehydrogenation, with a high turnover number (TON) of 15,200. This represents one of the best TON achieved using a manganese-based complex, demonstrating the importance of metal-ligand cooperativity in substrate activation for catalytic efficacy.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Tamasgen Fikadu Yadeta, Kuo-Wei Huang, Toyoko Imae, Yung-Liang Tung
Summary: The high performance of perovskite solar cells was achieved by using an electron transport layer (ETL) and hole transport layer. A film ETL (mesoporous (meso)-TiO2/carbon dot) was found to enhance the efficiency of the perovskite solar cells. Coating carbon dot on a meso-TiO2 ETL was shown to reduce pin-holes in the perovskite film layer, resulting in a 3% increase in the average power conversion efficiency (PCE). The absorption properties of the meso-TiO2/carbon dot ETL were superior, leading to higher power conversion efficiency compared to meso-TiO2 ETL. The deposition of carbon dot on meso-TiO2 ETL reduced carrier recombination and perovskite film cracks, thereby improving device performance.
Article
Chemistry, Multidisciplinary
Areej Aljarb, Jiacheng Min, Mariam Hakami, Jui-Han Fu, Rehab Albaridy, Yi Wan, Sergei Lopatin, Dimitrios Kaltsas, Dipti Naphade, Emre Yengel, Mohamed Nejib Hedhili, Roaa Sait, Abdul-Hamid Emwas, Arwa Kutbee, Merfat Alsabban, Kuo-Wei Huang, Kaimin Shih, Leonidas Tsetseris, Thomas D. Anthopoulos, Vincent Tung, Lain-Jong Li
Summary: Growing continuous monolayer films of TMDs without disrupting grain boundaries is a challenge. The presence of an interfacial reconstructed (IR) layer within the substrate-epilayer gap affects the orientations of nucleating TMDs domains and materials' properties. These findings have implications for the development of TMD-based electronics and optoelectronics.
Article
Chemistry, Organic
Xinyu Liu, Zhixin Liu, Yongyi Hu, Kuo-Wei Huang, Manjaly J. Ajitha, De Wang
Summary: A novel alpha,beta-regioselective [3+2] cycloaddition reaction of arylallene with C,N-cyclic azomethine imine is reported. The axial-to-central chirality transfer phenomenon has been disclosed with chiral allenes in the reaction. The wide substrate scope, including different functional groups and natural products, reveals the generality of the methodology. Both experiments and density functional theory calculations have been used to elucidate a plausible mechanism.
Article
Chemistry, Multidisciplinary
Hao Huang, Dharmaraj Periyanagounder, Cailing Chen, Zhongxiao Li, Qiong Lei, Yu Han, Kuo-Wei Huang, Jr-Hau He
Summary: Developing a green and energy-saving artificial leaf for solar-driven ammonia conversion is achieved by imitating the biological nitrogen fixation and photosynthesis processes. The monolithic artificial leaf achieves high ammonia production rates and Faradaic efficiencies without applying external potential. By integrating an OER catalyst, the artificial leaf can directly convert solar energy into chemical energy and generate useful products. The importance rating of this research is 8 out of 10.
Article
Chemistry, Multidisciplinary
Tianyu Zheng, Rui Chen, Jingxian Huang, Theo P. Goncalves, Kuo-Wei Huang, Ying-Yeung Yeung
Summary: Bifunctional catalysis is important in synthesizing useful compounds. Confined bifunctional catalysts can achieve highly enantioselective reactions. This study demonstrates a proof-of-concept approach to formulating confined catalysts by linking catalytic species via non-covalent interactions. The reactions are optimized by changing the achiral catalyst.
Article
Engineering, Environmental
Hend Omar Mohamed, Vijay K. Velisoju, Idoia Hita, Omar Abed, Rajesh K. Parsapur, Naydu Zambrano, Mohamed Ben Hassine, Natalia Morlanes, Abdul-Hamid Emwas, Kuo-Wei Huang, Pedro Castano
Summary: By using the in situ modified zeolite technique, researchers have successfully developed an efficient catalyst with high Ni2+ species concentration and good dispersion, which can improve the yield and stability of 1-butene while reducing the formation of by-products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fatimah Mohammad H. Al Sulami, Merfat M. Alsabban, Ahlam I. Al-Sulami, Mohamed Farrag, Sylvain Vedraine, Kuo-Wei Huang, Eslam Sheha, Talaat A. Hameed
Summary: Replacing selenium with sulfur in Cu1.8Se can improve the low electronic conductivity of Cu-Se and mitigate the effect of polysulfide species. A Cu1.8Se0.6S0.4 nanocrystalline powder was synthesized by solid-state reaction and its structure and storage mechanism were confirmed by various characterization techniques. Significant surface morphology changes were observed during the charging/discharging process.
Article
Chemistry, Organic
Delong Han, Priyanka Chakraborty, Li Yang, Hao Huang, Kuo-Wei Huang
Summary: Alkylation of a nitride ligand of a post-modified Mo(V) complex with MeOTf and EtOTf resulted in the formation of highly stable Mo(IV) imido complexes. Unlike the known Mo(VI) nitride complexes, which can be deprotonated to form ketimide for further reactions, the alkylation products in this study could only be reduced by NaH. Treatment with PhCH2OTf led to the formation of a new dinuclear Mo complex with N-2 release, instead of benzylation of the nitride ligand.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Review
Chemistry, Multidisciplinary
Chen-Fu Lin, Kuo-Wei Huang, Yen-Ting Chen, Sung-Lin Hsueh, Ming-Hsien Li, Peter Chen
Summary: This review introduces X-ray detectors using various halide perovskite materials and discusses their performance. Single-crystal perovskite as an active material exhibits excellent performance under X-ray illumination, while inorganic perovskite shows good environmental stability and high X-ray sensitivity. Double perovskite with the introduction of high-atomic-numbered elements demonstrates better attenuation of X-rays, and lead-free perovskite exhibits potential application in X-ray detectors due to its high X-ray attenuation capability. The up-scaling process technology for fabricating large-area and thick perovskite films for X-ray detectors is also introduced.
Editorial Material
Chemistry, Physical
Indranil Dutta, Rajesh Kumar Parsapur, Sudipta Chatterjee, Amol M. Hengne, Davin Tan, Karthik Peramaiah, Theis I. Solling, Ole John Nielsen, Kuo-Wei Huang
ACS ENERGY LETTERS
(2023)
Article
Optics
Zhongxiao Li, Zhen Li, Hao Huang, Yunduo Yao, Bilawal Khan, Ye Zhu, Kuo-Wei Huang, Zhiping Lai, Jr-Hau He
Summary: The study proposes an unassisted photoelectrochemical lithium extraction system that uses sunlight to extract lithium from seawater. The system achieved a significant increase in lithium concentration and demonstrated excellent light-harvesting and catalytic capabilities. It offers a promising solution to future lithium supply limitations.
Article
Materials Science, Multidisciplinary
Jian-Xin Wang, Indranil Dutta, Jun Yin, Tengyue He, Luis Gutierrez-Arzaluz, Osman M. Bakr, Mohamed Eddaoudi, Kuo-Wei Huang, Omar F. Mohammed
Summary: In this study, a highly efficient and reabsorption-free transparent X-ray imaging scintillator was fabricated by utilizing an efficient triplet-triplet energy transfer strategy between TADF-Br and Ir-OMC. The experiments and calculations showed that efficient energy transfer from TADF-Br to Ir-OMC can be achieved, leading to enhanced triplet-state radioluminescence upon X-ray irradiation. The fabricated scintillator achieved a high X-ray imaging resolution of 19.8 lp mm -1 .
Review
Chemistry, Multidisciplinary
Bin Chang, Hong Pang, Fazal Raziq, Sibo Wang, Kuo-Wei Huang, Jinhua Ye, Huabin Zhang
Summary: In this review, the recent progress and challenges in preparing C2+ products are discussed. The recent advancements in carbon-carbon coupling results and proposed mechanisms are elaborated, along with the complex scenarios involved in the initial CO2 activation process, catalyst micro/nanostructure design, and mass transfer conditions optimization. The synergistic realization of high C2+ product selectivity through catalyst design and the influence of electrolytes using theoretical calculation analysis and machine learning prediction are also proposed. The in situ/operando techniques for tracking structural evolution and recording reaction intermediates during electrocatalysis are elaborated, as well as insights into triphasic interfacial reaction systems with improved C2+ selectivity.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Lujain Alrais, Sandeep Suryabhan Gholap, Indranil Dutta, Edy Abou-Hamad, Benjamin W. J. Chen, Jia Zhang, Mohamed Nejib Hedhili, Jean-Marie Basset, Kuo-Wei Huang
Summary: Formic acid is a promising hydrogen carrier for on-demand hydrogen generation. By immobilizing a homogeneous PN3P-Ir pincer catalyst onto a support, the advantages of both homogeneous and heterogeneous catalysts can be combined. The use of cesium formate as a reaction medium and basic additive under suitable conditions significantly improves the reactivity.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)