Article
Chemistry, Physical
Martin Soto, Vicente Gotor-Fernandez, Humberto Rodriguez-Solla, Walter Baratta
Summary: The transfer hydrogenation of flavanones and ortho-hydroxychalcones catalyzed by ruthenium pincer complexes allows the synthesis of ortho-hydroxy 1,3-diarypropanols with high yield and selectivity. The amount of co-catalyst is crucial for the reduction reaction, while using pincer catalysts with specific ligands can achieve high enantiomeric excess and moderate conversion rates in the reduction of flavanones.
Article
Chemistry, Physical
Renat Kadyrov
Summary: An efficient and simple catalytic system has been developed for the hydrogenation of carboxylic esters using commercially available Ru-salts and imidazolium salts. This combination enables the reduction of esters to alcohols at moderate temperature and pressure, offering a practical method for alcohol synthesis.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Alexia N. Kim, Aurapat Ngamnithiporn, Michael D. Bartberger, Brian M. Stoltz
Summary: The first asymmetric trans-selective hydrogenation of 1,3-disubstituted isoquinolines has been developed, resulting in enantioenriched trans-tetrahydroisoquinolines in good yield with high enantioselectivity. Mechanistic studies reveal the crucial role of non-coordinating chlorinated solvents and halide additives in enabling trans-selectivity.
Article
Chemistry, Physical
Marcus N. A. Fetzer, Ghazal Tavakoli, Axel Klein, Martin H. G. Prechtl
Summary: E-alkenes were synthesized with up to 100% E/Z selectivity via ruthenium-catalyzed partial hydrogenation of different aliphatic and aromatic alkynes under transfer-hydrogenation conditions. The use of paraformaldehyde as a safe and cheap solid hydrogen carrier, along with water, for transfer-hydrogenation of alkynes was optimized with the binuclear [Ru(p-cymene)Cl-2](2) complex and BINAP ligand. Mechanistic investigations revealed that the E-selectivity in this reaction is due to the fast Z to E isomerization of the formed alkenes.
Article
Chemistry, Physical
Michael Rauch, Jie Luo, Liat Avram, Yehoshoa Ben-David, David Milstein
Summary: This study reports a novel synthesis of thioesters and reveals the mechanism of their reverse hydrogenation. Experimental and computational approaches were used to elucidate the likely pathway of the reactions and discuss the impact of hydrogen gas pressure on selectivity. The study also identified the competitive nature of reactions between thiols and alcohols, as well as the stability differences of related catalysts.
Article
Chemistry, Multidisciplinary
Eliezer Ortiz, Brian J. Spinello, Yoon Cho, Jessica Wu, Michael J. Krische
Summary: Iodide-bound ruthenium-JOSIPHOS complexes catalyze the redox-neutral C-C coupling of primary alcohols with methylallene or 1,3-butadiene to form anti-crotylation products with high levels of diastereo- and enantioselectivity. This method allows for direct crotylation of primary alcohols in the presence of unprotected secondary alcohols, significantly reducing the number of steps required to synthesize substructures of spirastrellolide B and leucascandrolide A.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Catherine Gazolla Santana, Michael J. Krische
Summary: Catalytic carbonyl reductive couplings facilitated by hydrogenation, transfer hydrogenation, and hydrogen autotransfer allow unsaturated hydrocarbons to substitute organometallic reagents for C-C bond formation without the need for stoichiometric metals, addressing issues of safety and challenges in large-scale implementation.
Article
Chemistry, Organic
Dongxu He, Donghao Wang, Chen Xu, Xiangyou Xing
Summary: A highly efficient kinetic resolution of allylic alcohols with Z/E mixtures was achieved via Ru-catalyzed selective dehydrogenation. Not only were allylic alcohols obtained with pure Z-geometry, but the corresponding selectivity factors rank among the few highest for kinetic resolution reported in the literature.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Kaili Zhang, Qixing Liu, Renke He, Danyi Chen, Zhangshuang Deng, Nianyu Huang, Haifeng Zhou
Summary: The asymmetric reduction of C = O bonds of 2-arylidene cycloalkanones using a chiral ruthenium complex as a catalyst and HCOOH/Et3N as a hydrogen source resulted in high yields and high enantiomeric excess. This method is not only suitable for small-scale synthesis, but also applicable for the gram-scale synthesis of pharmaceutically important compounds.
Article
Chemistry, Multidisciplinary
Feng Zhong, Zhi-Zhou Pan, Si-Wei Zhou, Hai-Jun Zhang, Liang Yin
Summary: The study demonstrates a regioselective asymmetric allylation of ketones using commercially available 1,4-pentadiene as a pronucleophile. Chiral tertiary alcohols with a terminal (Z)-1,3-diene unit are produced with high (Z)/(E) ratio and enantioselectivity. The partial isomerization of (E)-allylcopper(I) species to (Z)-allylcopper(I) species is observed during the reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Biochemistry & Molecular Biology
Vincent Ritleng, Christophe Michon
Summary: This review focuses on the application of ruthenium complexes with bidentate donor-functionalized N-heterocyclic carbene ligands in catalyzing hydrogen transfer reactions, and discusses the effects of different donor atoms and carbene ligands on the transfer hydrogenation reactions. This research is important for improving the efficiency and selectivity of catalytic hydrogen transfer reactions.
Article
Chemistry, Inorganic & Nuclear
Zheng Wang, Ning Ma, Xiaochi Lu, Ming Liu, Tian Liu, Qingbin Liu, Gregory A. Solan, Wen-Hua Sun
Summary: A series of manganese(i) carbonyl complexes with structurally related NN- and NNN-chelating ligands were synthesized and used as catalysts for transfer hydrogenation. The NN-systems based on N-R functionalized 5,6,7,8-tetrahydroquinoline-8-amines showed the highest catalytic activity in the conversion of acetophenone to 1-phenylethanol. The N-isopropyl derivative, Mn1, when combined with t-BuONa, achieved efficient reduction of acetophenone and various carbonyl substrates, with high TON values (up to 17,200; TOF of 3550 h(-1)). These findings support an outer-sphere mechanism for the hydrogen transfer and provide a sustainable alternative for producing alcoholic products from carbonyl substrates.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Organic
Steffen Skowaisa, Edgar Haak
Summary: A highly effective catalyst for the alkylation of poorly reactive alcohols with indoles or ketones has been discovered. This catalyst is readily available, stable in air and moisture, and exhibits wide functional group tolerance.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Zheng Wang, Yahuan Liu, Mingyang Han, Ning Ma, Quanming Lyu, Qingbin Liu, Wen-Hua Sun
Summary: Molybdenum complexes with various structural features were developed and showed high activity in the transfer hydrogenation reaction. The products can be easily purified by removing the byproduct.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Applied
Maria Jesus Moran, Katia Martina, Vidmantas Bieliunas, Francesca Baricco, Silvia Tagliapietra, Gloria Berlier, Wim M. De Borggraeve, Giancarlo Cravotto
Summary: The use of copper(0) nanoparticles as a lead-free alternative catalyst for the hydrogenation of alkynes has shown promising results in producing high yields of (Z)-alkenes. The protocol relies on non-noble copper nanoparticles for reduction of various types of alkynes, with polyols acting as hydrogen sources. Enabling technologies like microwave and ultrasound irradiation can significantly decrease reaction time.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Taotao Hu, Fu Zhang, Hua Yu, Meng Zhang, Yue Yu, Wenfeng Zhang, Rui Liu, Liuwen Tian, Zhu Ma
Summary: The efficient hole transport layer of NiOx was prepared by surface passivation engineering with CsI, which effectively passivates surface trap states and improves conductivity. This approach shows great potential for high-performance functional interfacial modification in solar cell applications, leading to decent power conversion efficiency.
Article
Chemistry, Physical
Wenjing Yu, Xiaoran Sun, Mu Xiao, Tian Hou, Xu Liu, Bolin Zheng, Hua Yu, Meng Zhang, Yuelong Huang, Xiaojing Hao
Summary: Lead halide perovskite solar cells have rapidly developed in the past decade, with interface engineering playing a crucial role in optimizing device performance and long-term stability through defect passivation, inhibiting ion migration, optimizing energy band alignment, and morphological control.
Article
Multidisciplinary Sciences
Liang Cao, He Zhao, Rongqing Guan, Huanfeng Jiang, Pierre H. Dixneuf, Min Zhang
Summary: 2-(hetero)aryl N-heteroarenes are widely used in various fields but lack a general synthetic method. The authors present an iridium(III)-catalyzed approach for direct alpha-arylation of N-heteroarenes with aryl and heteroaryl boronic acids, using a H2O-mediated H-2-evolution cross-coupling strategy, providing a practical route for direct access to these compounds.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jian Yang, He Zhao, Zhenda Tan, Liang Cao, Huanfeng Jiang, Chenggang Ci, Pierre H. Dixneuf, Min Zhang
Summary: This study introduces a ruthenium-catalyzed method for reductive dearomatization-induced tandem functionalization, offering a general approach for constructing fused heterocycles with high functional group tolerance and broad substrate scope.
Review
Energy & Fuels
Yue Yu, Fu Zhang, Tian Hou, Xiaoran Sun, Hua Yu, Meng Zhang
Summary: Gas quenching technique is crucial for preparing high-quality perovskite films for efficient large-area PSCs, showing great potential in application and future research direction for high-performance optoelectronic devices. The scalable technique related to gas quenching for large-area perovskite films and modules is proposed, providing a promising pathway for upscalable production.
Article
Chemistry, Physical
Fu Zhang, Xiaoran Sun, Haonan Xie, Xudong Cai, Bolin Zheng, Hua Yu, Enzuo Liu, Xiaojing Hao, Meng Zhang
Summary: This research investigates the mechanism of ion-migration suppression in CsPbI2Br perovskite solar cells through interstitial doping of Sm, which significantly improves the operational stability of the cells. The results demonstrate the advantages of Sm interstitial doping, including effectively suppressed ion migration, faster photocurrent response, and more stable maximum power point tracking performance.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Yue Yu, Rui Liu, Fu Zhang, Chang Liu, Qiaofeng Wu, Meng Zhang, Hua Yu
Summary: The introduction of alkali pseudo-halide KBF4 into the perovskite precursor solution results in a less defect WBG perovskite film, leading to improved performance of solar cells. The interstitial occupancy of K+ in the perovskite lattice and the suppression of recombination by BF4 help inhibit ion migration and reduce trap density, enhancing the overall efficiency of the solar cells.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Tian Hou, Meng Zhang, Wenjing Yu, Xin Wang, Zhengying Gu, Qian Chen, Lan Lan, Xiaoran Sun, Yuelong Huang, Bolin Zheng, Xu Liu, Martin A. Green, Xiaojing Hao
Summary: Gas-quenching with TMSO enables the fabrication of high-quality FA(0.9)Cs(0.1)PbI(3) perovskite films without the use of MA cation. The technique regulates intermediate films and results in superior stability in MA-free perovskite devices without any passivation treatment. The PSCs fabricated without MA and Br additives exhibit a power conversion efficiency of 21.3% and demonstrate promising potential for scalable manufacturing of high-efficiency MA-free PSCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Applied
Hongming Hou, Taotao Hu, Fu Zhang, Rui Liu, Jialong He, Chang Liu, Yue Yu, Dong Chen, Qiaofeng Wu, Meng Zhang, Hua Yu
Summary: Introducing a cross-linkable small molecule of 2-mercaptoimidazole (2-MI) into the nickel oxide (NiOx)/2D perovskite interface led to the formation of Ni-N covalent bond and coordination between S atom of 2-MI and under-coordinated Pb2+. This helps to create a crosslinking to restrain charge carrier recombination and enhance hole carrier extraction, thereby improving the efficiency of inverted 2D perovskite solar cells.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Applied
Zhu Ma, Dejun Huang, Qianyu Liu, Guangyuan Yan, Zheng Xiao, Dong Chen, Jiaxuan Zhao, Yan Xiang, Changtao Peng, Haijin Li, Meng Zhang, Wenfeng Zhang, Lianfeng Duan, Yuelong Huang
Summary: CsFAMA mixed perovskites show increased power conversion efficiency over time, with PbI2 playing a role in defect passivation in the perovskite film. The study explores the relationship between enhanced device performance, excess PbI2, and PbI2 evolution in triple cation perovskite films.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Optics
Xu Liu, Bolin Zheng, Lei Shi, Shujie Zhou, Jiangtao Xu, Ziheng Liu, Jae Sung Yun, Eunyoung Choi, Meng Zhang, Yinhua Lv, Wen-Hua Zhang, Jialiang Huang, Caixia Li, Kaiwen Sun, Jan Seidel, Mingrui He, Jun Peng, Xiaojing Hao, Martin Green
Summary: This study presents a facile approach for doping spiro-OMeTAD hole-transport materials using a low-cost alkylthiol additive DDT. The incorporation of DDT allows for a more efficient and controllable doping process with reduced duration. Coordination between DDT and LiTFSI increases the dopant concentration, enhances the structural integrity of the material, and improves device performance under wetting, heat, and light stress.
Article
Chemistry, Multidisciplinary
Yuan Wu, Chen Yang, Jie Liu, Meng Zhang, Weiqiang Liu, Wansi Li, Chengcheng Wu, Gang Cheng, Qingdan Yang, Guodan Wei, Chi-Ming Che
Summary: A series of neutral iridium complexes with tridentate bis-NHC carbene chelates, bidentate C<^>N ligands, and monodentate ions have been systematically designed and synthesized, showing specific roles in tuning UV absorption and emission properties. The C<^>N ligands play a crucial role in this tuning process, while the tridentate bis-NHC carbene chelates influence the lowest absorption band and emission energy.
Article
Materials Science, Multidisciplinary
Tao Wang, Ming Shi, Daqi Fang, Junpeng He, Meng Zhang, Siwei Zhang, Guodan Wei, Hong Meng
Summary: Two new hybrid materials, DPNA-SFX and DOPNA-SFX, were successfully synthesized by incorporating two PNA groups with a bridging phenyl ring to an SFX center, exhibiting similar photophysical properties and outstanding glass-transition temperature. Both green and red PHOLEDs based on these materials showed remarkable performance, with the red PHOLEDs achieving comparable efficiency to the best red PHOLEDs and maintaining high efficiency even at high luminance levels.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Organic
Rongqing Guan, He Zhao, Liang Cao, Huanfeng Jiang, Min Zhang
Summary: This study presents a novel reductive alpha-phosphinoylation reaction for the direct construction of novel compounds with various advantages. The strategy is expected to be further utilized in developing direct transformations of inert N-heteroarenes into functional frameworks.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Hongjun Chen, Meng Zhang, Thanh Tran-Phu, Renheng Bo, Lei Shi, Iolanda Di Bernardo, Jueming Bing, Jian Pan, Simrjit Singh, Josh Lipton-Duffin, Tom Wu, Rose Amal, Shujuan Huang, Anita W. Y. Ho-Baillie, Antonio Tricoli
Summary: Metal halide perovskite solar cells with an appropriate bandgap and high output voltage can directly drive solar water splitting, but their sensitivity to moisture affects their application in integrated devices. Using earth-abundant metals as co-catalysts can improve the efficiency of low-cost H-2 production.
ADVANCED FUNCTIONAL MATERIALS
(2021)
