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Versatile Synthesis ofα-Oxygen Organoboron Compounds via Photo-Induced Siloxycarbene

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Chinese Journal of Chemistry 2024年第22期42卷 2712-2716页

作者： Xiongxiong Lu Qingbin Zhao Dehai Cao Pan Xu xuenian chen Zhenxing Liu College of Chemistry Zhengzhou UniversityZhengzhouHenan 450001China Henan Key Laboratory of Boron Chemistry and Advanced Materials Schoolof Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenan 453007China

Comprehensive Summary A novel method for synthesizingα-oxygen organoboron compounds has been developed through acylsilane-based carbene insertion reactions into C—B *** coupling partners,readily available organoboron compounds(alkenyl,allyl,and allenyl B(pin))were *** on the substrates,pure insertion into C—B bonds or insertion followed by a siloxy group rearrangement process(from carbon to boron)would occur,delivering theα-oxygen organoboron compounds with great *** experiments demonstrated that the electronic effect of the substituents mainly controlled the rearrangement ***,no matter which isomer of substrate(Z or E)was used,the reaction withβ-aryl-substituted alkenyl B(pin)affords both isomers of products(Z and E,separable through column chromatography).Trapping experiments indicated the triplet energy transfer process was involved.

关键词： Acylsilanes Siloxy carbenes Organoboron compounds Isomerization Photocatalysis Rearrangement

Two transition-metal-modified Nb/W mixed-addendum polyoxometalates for visible-light-mediated aerobic benzylic C–H oxidations

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Chinese Chemical Letters 2022年第9期33卷 4395-4399页

作者： Yubin Ma Fan Gao Wanru Xiao Na Li Shujun Li Bing Yu xuenian chen School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy MaterialsHenan Normal UniversityXinxiang 453007China College of Chemistry Zhengzhou UniversityZhengzhou 450001China

The visible-light-induced selective oxidation of ubiquitous C–H bonds into valuable C=O bonds under aerobic conditions is one of the most attractive approaches for the construction of carbonyl-containing *** this work,two transition metal-containing Nb/W mixed-addendum POMs dimers with the formula of K_(2)Na_(2)H_(5)[(Fe(H_(2)O)_(4))_(3)(P_(2)W_(15)Nb_(3)O_(62))_(2)]·24H_(2)O(POM[Fe])and K_(2)Na_(3)H_(4)[(Cr(H_(2)O)_(4))_(3)(P_(2)W_(15)Nb_(3)O_(62))_(2)]·32H_(2)O(POM[Cr])have been synthesized and characterized by various analytical and spectral ***[Fe]was proved to be an efficient photocatalyst for benzylic C–H oxidation under visible light and using oxygen as an oxidant to produce the corresponding carbonyl complex in good yields.A plausible mechanism involving superoxide radical was proposed for the catalytic ***[Fe]showed good reusability in the recycling *** spectroscopy and XRD analysis indicate that POM[Fe]can retain its integrity after catalysis.

关键词： Polyoxometalates Mixed-addendum POMs Visible-light-induced catalysis Photocatalysis C-H bonds oxidation

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Understanding the Electronic Structure and Stability of B_(n)X_(n)^(0/2-)(n=4,6;X=H,F,Cl,Br,I,At,Ts)Clusters

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Chinese Journal of Chemistry 2021年第7期39卷 1811-1818页

作者： Ruo-Ya Wang Jing-Xuan Zhang Xue-Lian Jiang Nana Ma xuenian chen Cong-Qiao Xu Jun Li Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials School of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenan453007 China Department of Chemistry Southern University of Science and TechnologyShenzhenGuangdong518055 China Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhouHenan450001 China Department of Chemistry and Key Laboratory of Organic Optoelectronics&Molecular Engineering of Ministry of Education Tsinghua UniversityBeijing100084 China

Main observation and conclusion Borane clusters and their derivatives have attracted extensive attention in inorganic chemistry due to their fascinating multi-center bonding patterns and physicochemical *** we report ... 详细信息

关键词： Boron Multi-center bonding Electronic structure Chemical bonding Aromaticity

Selective synthesis of the B_(11)H_(14)^(-) and B_(12)H_(12)^(2-) borane derivatives and the general mechanisms of the B-H bond condensation

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Science China Chemistry 2024年第3期67卷 876-881页

作者： Yi Jing Xinghua Wang Hui Han Xin-Ran Liu Xing-Chao Yu Xi-Meng chen Donghui Wei Lai-Sheng Wang xuenian chen College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy MaterialsHenan Normal UniversityXinxiang 453007China Department of Chemistry Brown UniversityProvidenceRI 02912USA

Polyhedral boranes are a class of well-known boron molecular clusters with unique physical and chemical properties,and great efforts have been made in the past decades to find more effective synthetic ***,the established synthetic methods suffer from low efficiency and low selectivity because the mechanism of the B-H bond condensation reaction,critical for the synthesis of the polyhedral boranes,is not well *** we report highly selective and efficient synthetic methods of the salts of the tetradecahydridoundecaborate(1-)(B_(11)H^(-)_(14)) and dodecahydrido-dodecaborates(2-)(B_(12)H_(12)^(2-)) anions by employing commercially available and inexpensive starting *** theoretical and experimental investigations are carried out to elucidate the reaction *** have found that the nature of the B-H bond condensation is the dihydrogen bonding interaction in which the positively charged hydrogens(bridged hydrogens) play a crucial *** current study has not only led to more effective and selective synthetic methods for B_(11)H^(-)_(14) and B_(12)H_(12)^(2-) but also unveiled the nature of the B-H bond condensation and the general formation mechanisms of polyhedral *** finding will facilitate the development of more effective synthetic methods for polyhedral boranes and spur their wide application.

关键词： Boranes polyhedral boranes dihydrogen bond nucleophilicity

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Scalable biomimetic SARS-CoV‑2 nanovaccines with robust protective immune responses

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Signal Transduction and Targeted Therapy 2022年第4期7卷 978-980页

作者： xuenian chen Tongfei Shi Chao Yang Fangman chen Xuan He Kunbao Zhang Hanze Hu Lulu Cai Kam WLeong Dan Shao School of Biomedical Sciences and Engineering South China University of TechnologyGuangzhou International CampusGuangzhouGuangdong 511442China Institutes of Life Sciences School of MedicineSouth China University of TechnologyGuangzhouGuangdong 510006China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhouGuangdong 510006China Department of Biomedical Engineering Columbia UniversityNew YorkNY 10027USA Personalized Drug Therapy Key Laboratory of Sichuan Province Department of PharmacySichuan Provincial People’s HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610072China Guangdong Provincial Key Laboratory of Biomedical Engineering South China University of TechnologyGuangzhou 510006China Key Laboratory of Biomedical Material and Engineering of the Ministry of Education South China University of TechnologyGuangzhou 510006China

Dear Editor,The emergence of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection requires rapid development of vaccines matching the pace of virus *** the firstgeneration of nucleic acid vaccines have been successful,subunit vaccines carry far fewer safety concerns and also have shown promise in clinical trials.

关键词： vaccines protective acute

Syntheses of Clusters Containing C2M2（M=Co,Mo）Cores and Crystal Structure of 〔dpp〕〔Mo2Cp2（CO）4〕·CH2Cl2

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Chinese Journal of Structural Chemistry 1999年第4期18卷 35-40页

作者： chen xuenian ZHANG Jie YIN YuanQi (State Key Laboratory for Oxo Synthesis and Selective Oxidation,Lanzhou Institute of Chemical Physics, the Chinese Academy of Sciences, Lanzhou 730000)ZSUN Jie (Shanghai Institute of Organic Chemistry, the Chinese Acad State Key Lab. Oxo Synthesis S. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Shanghai Inst. of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｔｅｎｓｉｖｅａｎｄｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｃｈｅｍｉｓｔｒｙｏｆｄｉｎｕｃｌｅａｒｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｏｍｐｌｅｘｅｓｂｒｉｄｇｅｄｂｙｕｎｓａｔｕ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｔｅｎｓｉｖｅａｎｄｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｃｈｅｍｉｓｔｒｙｏｆｄｉｎｕｃｌｅａｒｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｏｍｐｌｅｘｅｓｂｒｉｄｇｅｄｂｙｕｎｓａｔｕｒａｔｅｄｈｙｄｒｏｃａｒｂｏｎｓ...

关键词： cobalt molybdenum diyne compounds crystal structure cluster

A Ta/W Mixed Addenda Heteropolyacid with Excellent Acid Catalytic Activity and Proton-conducting Property

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A Ta/W Mixed Addenda Heteropolyacid with Excellent Acid Cata...

Syntheses and characterizations of linear diboranze derivatives

河南省化学会2016年学术年会

作者： Shujun Li Qingpo Peng Ruoya Wang xuenian chen School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal University

Heteropolyacids(HPAs) are highly suitable to catalyze various types of organic reactions in homogeneous liquid phase, but only limited HPAs with unambiguous structures have been reported so far[1,2]. In this abstract, a new HPAs H[PWTa(HO)(OH)O]·125HO(H-1, Fig. 1) which comprises a Ta/W mixed addenda heteropolyanion, 20 protons, and 125 crystalline water molecules has been prepared through ion-exchange method. AC impedance measurements indicate that H-1 is a good solid state proton conducting material at room temperature with a conductivity value of 7.2×10S cm(25 ℃, 30% RH). Cyclic voltammograms of H-1 indicate the electrocatalytic activity towards the reduction of nitrite. Hammett acidity constant H of H-1 in CHCN is-2.91, which is the strongest among the present known HPAs(Table 1). Relatively, H-1 exhibits excellent catalytic activities toward acetal reaction. The present work offers a new approach to the development of novel HPAs, and indicates that Ta/W mixed addenda HPAs are a potential subclass of acid catalysts. Our future work will be extended to exploring more Ta/W or Nb/W mixed addenda HPAs and relevant acid catalysis studies.

关键词： Acid catalysis Heteropolyacid Ion-exchange Proton conduction Tantalum

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Syntheses and characterizations of linear diboranze derivati...

河南省化学会2016年学术年会

作者： Huizhen Li Ruirui Wang Jie Zhang xuenian chen School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials Henan Normal University

Boron/nitrogen oligomers are potentially exciting new materials that are isoelectronic with technologically pervasive alkane because B-N is iso-electronic with C-C. Such compounds are mostly observed as the intermediate product or by-product in the literature and have rarely been synthesized. Our interest in alkylamine capped boron-nitrogen four-membered chain molecules and our desire to compare their properties with other substituted boron-nitrogen four-membered chain molecules and parent NHBHNHBH give impetus to a seeking for more efficient and conventient synthetic methods. A nucleophilic attack of small alkylamines on aminodiborane(ADB) produce a series of RRRNBHNHBH compounds(Scheme 1). Characterization by IR, NMR and single crystal X-ray diffraction of 14 linear fourmembered diboranze derivatives indicate that most of the RRRNBHNHBH compounds adopt an anti form conformation, few is in gauche form *** gauche form can be attributed to a weak dihydrogen bond between N-H and B-H that prevents the B-N bonds from rotation freely. In addition, both intermolecular dihydrogen bonds and intramolecular dihydrogen bonds were observed in their structures(Figure 1).

关键词： Aminodiborane Linear Diboranze Derivatives

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氨硼烷释氢纳米金属催化剂的研究

化学进展 2014年第5期26卷 749-755页

作者：张磊涂倩陈学年刘蒲郑州大学化学与分子工程学院郑州450001 河南师范大学化学化工学院新乡453007

化学储氢材料要求具有高的氢存储容量。氨硼烷(NH3BH3,AB)的氢含量高达19.6 wt%,是一种具有潜在应用前景的氢存储介质。AB的水解释氢容量高达7.8 wt%,热解释氢则可释放出19.6 wt%的氢,显示出其在化学储氢方面的巨大潜力。在AB释氢研究中... 详细信息

化学储氢材料要求具有高的氢存储容量。氨硼烷(NH3BH3,AB)的氢含量高达19.6 wt%,是一种具有潜在应用前景的氢存储介质。AB的水解释氢容量高达7.8 wt%,热解释氢则可释放出19.6 wt%的氢,显示出其在化学储氢方面的巨大潜力。在AB释氢研究中,催化剂是研究的核心技术和重要方向。由于纳米催化剂在AB释氢中所表现出的优良催化性能,本文将对氨硼烷释氢纳米金属催化剂及其性能的研究进行全面的总结和展望。

关键词：氨硼烷释氢纳米粒子催化剂金属

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