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Photopromoted methoxycarbonylation of olefin with methyl formate by Co(OAc)2

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Chinese Chemical Letters 2007年第1期18卷 17-20页

作者： ying Na Cui Jing Mei Yin Da Bin Gao ying ping jia Guang Yun Zhou Shen Min Li Liaoning Key Laboratory of Bio-Organic Chemistry Dalian University Dalian 116622 China

The photopromoted methoxycarbonylation of olefin with methyl formate catalyzed by Co（OAc）2 at ambient conditions has been carried out. The results indicated that the reaction activity increased with the increasing temperature. Methyl formate decomposed into CO and CH3OH firstly under irradiation, and then the methoxycarbonylation of olefin proceeded under catalysis of Co（OAc）2. The mechanism of methyl formate participating in the methoxycarbonylation is verified by the IR analysis and the labeling experiments of CDHOD and CH3^18OH.

关键词： Mcthoxycarbonylation Methyl formate Olefin Photopromoted Cobalt acetate

Photopromoted carbonylation of bromobenzene under ambient conditions

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Chinese Chemical Letters 2009年第5期20卷 531-534页

作者： Li Zhuo Mu ying ping jia Jing Mei Yin Guang Yun Zhou ying Na Cui Da Bin Gao Liaoning Key Laboratory of Bio-organic Chemistry Dalian University Dalian 116622 China

The photopromoted carbonylation of bromobenzene with carbon monoxide catalyzed by inexpensive commercially available cobalt salts [Co（OAc）2, COCl2] was carried out under ambient conditions. The results revealed that methyl benzoate was produced in the presence of basic additives （CH3ONa, NaOAc or （n-C4H9）3N）. The catalytic activity of Co（OAc）2 was higher than that of COCl2. Furthermore, the activity of the carbonylation was greatly improved by addition of acetophenone, e.g. both the yield and selectivity of the ester were increased from 47% to 91% with Co（OAc）2 as catalyst and CH3ONa as additive, while the yield of byproduct benzene from hydrodehalogenation of bromobenzene decreased from 32% to 8%.

关键词： Photopromoted carbonylation Bromobenzene Cobalt salts Sodium methoxide Acetophenone

Cobalt-catalyzed photopromoted carbonylation of chloroalkanes in the presence of KI

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Chinese Chemical Letters 2010年第9期21卷 1033-1036页

作者： ying ping jia ying Na Cui Jing Mei Yin Guang Yun Zhou Shen Min Li Da Bin Gao Xiang Sheng Wang State Key Laboratory of Fine Chemicals Dalian University of Technology. Dalian 116012 China Liaoning Key Laboratory of Bio-organic Chemistry Dalian University Dalian 116622China

The photopromoted carbonylation of chloroalkanes with carbon monoxide catalyzed by cobalt compounds[Co（OAc）2,CoCl2] in the presence of KI was carried out under ambient *** results revealed that the catalytic activity of Co（OAc）2 was higher than that of CoCl2.A basic additive NaOAc was beneficial to the ***,with NaOAc as an additive, Co（OAc）2 and CoCl2 exhibited similar catalytic *** work showed that the role of iodide ion was initially to form active iodoalkanes via substituting chloride ion in chloroalkanes in situ,and then,the carbonylation of iodoalkanes proceeded under irradiation.

关键词： Photopromoted carbonylation Chloroalkanes Cobalt complexes: KI

Photopromoted carbonylation of 1-bromo-6-chlorohexane under ambient conditions

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Chinese Chemical Letters 2008年第5期19卷 529-532页

作者： Yao Yun Hu Jing Mei Yin Da Bin Gao ying ping jia Guang Yun Zhou ying Na Cui Shen Min Li Liaoning Key Laboratory of Bio-organic Chemistry Dalian University Dalian 116622 China

Photopromoted carbonylation of 1-bromo-6-chlorohexane with CO catalyzed by CuBr2 and CdI2 has been carried out under ambient conditions. The results indicate that the carbonylation proceeds with the major product of chloroester ClCH2（CH2）5COOCH3 under catalysis of CuBr2. Furthermore, the activity of the carbonylation can be improved by addition of basic additives （NaOAc, Na3PO4 or （n-C4H9）3N）. Among these additives, （n-C4H9）3N is the most efficient in terms of the yield of ClCH2（CH2）5COOCH3. However, the methoxycarbonyl substituting chlorine product of BrCH2（CH2）5COOCH3 is not obtained in the presence of CdI2. This is quite different from the carbonylation of monochloroalkane.

关键词： Photopromoted carbonylation 1-Bromo-6-chlorohexane Copper bromide Tri-n-butylamine

Photo-promoted carbonylation of chloroalkanes with carbon monoxide by non-precious metal catalysts

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Chinese Chemical Letters 2007年第7期18卷 795-798页

作者： Hong Wei Wang ying ping jia Da Bin Gao Jing Mei Yin Guang-Yun-Zhou Shen Min Li Liaoning Key Laboratory of Bio-Organic Chemistry Dalian University Dalian 116622 China

The photo-promoted carbonylation of chloroalkanes with carbon monoxide was carried out under ambient conditions with copper and cadmium salts catalysts. The results indicated that the corresponding esters were produced with three salt catalysts, ***2, CuCl2 and CdI2. Among these catalysts, CdI2 was the most efficient in terms of ester yield and selectivity, particularly, 60% yield and 75% selectivity in the carbonylation of chlorocyclohexane were achieved. Furthermore, the yield and selectivity of the ester can be improved greatly by adding tri-n-butylamine in the CuBr2 and CuCl2 catalyst systems. On the other hand, the additive. As a result, we suggest that iodide ion plays an important role in the catalyst system of the cadmium salts.

关键词： Cadmium salts Copper salts Chloroalkanes Photo-promoted carbonylation

Photopromoted Carbonylation of Alkyl Bromides Catalyzed by Copper Salts under Ambient Conditions

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Chinese Chemical Letters 2005年第11期16卷 1455-1458页

作者： Tao WEN ying ping jia Da Bin GAO Jing Mei YINI Guang Yun ZHOU Jing LIU Xiang Sheng WANG Liaoning Key Laboratory of Bio-Organic Chemistry Dalian University Dalian 116622 State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116012

Photopromoted carbonylation of alkyl bromides with carbon monoxide or carbon dioxide catalyzed by copper salts can be carried out under ambient conditions （atmospheric pressure and room temperature） and the corresponding ester was produced. The yield and the selectivity of the ester can be improved greatly by addition of sodium phosphate.

关键词： Photopromoted carbonylation carbon monoxide carbon dioxide copper salts.

Effect of orthodontic force on inflammatory periodontal tissue remodeling and expression of IL-6 and IL-8 in rats

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Asian Pacific Journal of Tropical Medicine 2013年第10期6卷 757-761页

作者： jian-Hao Yang Zheng-Chen Li Wei-Dong Kong Wu Zhang ying-ping jia Yue-Lan Zhang Lin-Bo Liu Xue-ping Han Department of Stomatology First Affiliated Hospital of Zhengzhou University Stomatological Medical College of Zhengzhou University Zhongyuan RoadZhengzhou City Department of Anesthesia First Affiliated Hospital of Zhengzhou University Children's Hospital of Zhengzhou Zhengzhou City Department of Stomatology First Affiliated Hospital of Jinan University Children's Hospital of Zhengzhou Stomatological Medical College of Zhengzhou University Department of Plastic and Cosmetology First Affiliated Hospital of Zhengzhou University

Objective:To investigate effect of orthodontic force on inflammatory periodontal tissue remodeling and expression of IL-6 and IL-8 in ***:Eighty SD rats were randomly divided into 4 groups,blank control group(group A)with 5 rats,treatment normal group(group B)with 25 rats,inflammation control group(group(group C)with 25 rats,inflammation treatment group(group D)with 25 *** and histomorphometric analysis was performed to measure the expression of IL-6,IL-8 and the firet molar to the recent movement in the ***:The expression of IL-8 reached a maximum on day 5 and declined thereafter in group B;the expression of IL-6 reached a maximum on day 5 in group *** expression of IL-6 and IL-8 was gradually weakened with time in group *** expression of IL-6 and IL-8 were high,and reached a maximum on day 5 and declined thereafter in group *** of positive cells in group D were higher than group B at each time point(P<0.05).The time which 0.49 N orthodontic force was loaded was longer,orthodontic tooth movement distance was *** distance in group D were longer than group B(P<0.05).Conclusions:Orthodontic force as well as inflammatory stimulus can evoke the expression of IL-6 and *** the combined effects of inflammation and orthodontic force,the expression of IL-6,IL-8will increase.

关键词： Orthodontic tooth movement Inflammatory periodontal tissue Interleukin-6 Interleukin-8

多维度炭材料在高性能锌-空气电池中的先进设计策略

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新型炭材料（中英文） 2022年第4期37卷 641-657页

作者：应佳萍郑冬孟诗博尹瑞连戴晓婧冯锦秀毋芳芳施文慧曹澥宏浙江工业大学化学工程学院浙江杭州310014 浙江工业大学材料科学与工程学院绿色化学合成技术国家重点实验室培育基地浙江杭州310014 浙江工业大学化学工程学院膜分离与水科学技术中心浙江杭州310014 浙江工业大学平湖新材料研究院浙江嘉兴314213

锌-空气电池(ZABs)具有高安全性、低成本、高比容量和环境友好等特点,已成为能源研究的热点之一。然而,空气正极上缓慢的氧析出/氧还原反应(OER/ORR)和锌负极上不可忽视的锌枝晶生长问题严重阻碍了锌-空气电池的大规模应用。在过去的几... 详细信息

锌-空气电池(ZABs)具有高安全性、低成本、高比容量和环境友好等特点,已成为能源研究的热点之一。然而,空气正极上缓慢的氧析出/氧还原反应(OER/ORR)和锌负极上不可忽视的锌枝晶生长问题严重阻碍了锌-空气电池的大规模应用。在过去的几年里,具有低成本、良好导电性、高化学稳定性和OER/ORR双功能催化活性的炭材料已被广泛研究。本文首先介绍了锌-空气电池的基本原理及炭材料应用于锌-空气电池中的特点与优势。进一步综述了多维度炭材料(一维、二维、三维)在空气电极、锌负极和隔膜等电池主体中的研究进展,着重讨论多维度炭材料对电池性能的提升机理。最后,提出了当前炭材料应用于锌-空气电池面临的挑战,并对未来的研究重点与发展方向进行了展望。

关键词：多维炭材料锌-空气电池氧还原反应锌阳极隔膜

Triplet excitation dynamics of β-carotene studied in three solvents by ns flash photolysis spectroscopy

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Chinese Chemical Letters 2017年第1期28卷 83-88页

作者： ying jia ying Shi Peng Wang jian-ping Zhang Department of Chemistry Renmin University of China Beijing 100872 China

Upon anthracene-sensitizing, triplet excitation dynamics of β-carotene（β-Car） were studied in nhexane, in methanol, and in acetonitrile, respectively, by ns flash photolysis spectroscopy. In n-hexane,only the bleaching of the ground state absorption（GSB） and the excitation triplet（^3Car＊） absorption were observed, and there were no cationic species detected. In both methanol and acetonitrile, similar excitation dynamics were observed, i.e.,^3Car＊ having a similar lifetime to that in n-hexane, and the immediate generation of the cation dehydrodimer（^#[Car]2^＋） upon excitation following transformation into the radical cation Car＊^＋, since Car＊^＋ has much longer lifetime in acetonitrile than in methanol. The results prove that both solvent and carotenoid structure determine the triplet excitation mechanism.

关键词： β-Carotene Triplet excitation dynamics Solvent effect ns Flash photolysis