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molecular mechanism for the unusual enhancement of the second-step chemiluminescence production from the carcinogenic tetrabromohydroquinone and H2O_(2)

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Journal of Environmental sciences 2024年第7期141卷 330-342页

作者： Zi-Han Wang Chun-Hua Huang Zhi-Sheng Liu Li Mao Ben-zhan Zhu State Key Laboratory of Environmental chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China college of Environment and Resources University of Chinese Academy of SciencesBeijing 100049China

We have found recently that two-step intrinsic hydroxyl radical(·OH)-dependent chemiluminescence(CL)could be produced by carcinogenic tetrahaloquinone and H_(2)O_(2).However,the first-step CL was too fast to clearly detect the stepwise generation of·OH and CL,and to distinguish the exact dividing point between the first-step and second-step *** we found that,extremely clear two-step intrinsic CL could be produced by the relative slow reaction of tetrabromohydroquinone(TBHQ)with H_(2)O_(2),which was directly dependent on the two-step·OH ***,the second-step,but not the first-step CL production of TBHQ/H_(2)O_(2)(CRET donor)was markedly enhanced by fluorescein(a typical xanthene dye,CRET acceptor)through a unique chemiluminescence resonance energy transfer(CRET)*** novel CRET system of TBHQ/H_(2)O_(2)/fluorescein was successfully applied for the sensitive detection of TBHQ with the detection limit as low as 2.5μmol/*** findings will help to develop more sensitive and highly efficient CL or CRET systems and specific CL sensor to detect the carcinogenic haloquinones,which may have broad environmental applications.

关键词： Two-step chemiluminescence Bromohydroquinone Hydrogen peroxide Hydroxyl radical CRET

A new acyclic hexaphenolic tetranuclear complex:synthesis,X-ray crystal structure and self-assembly

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A new acyclic hexaphenolic tetranuclear complex:synthesis,X-...

The synthesis and characterization of a new hexamine compound

中国化学会第四届有机化学学术会议

作者： Zhiquan Pan, hong zhou, Zhenghe Peng, Hanping zhang School of Chemical Engineering and Pharmacy, wuhan Institute of Chemical Technology, wuhan, 430073 college of chemistry and molecular Science, wuhan university, wuhan 430072

＜正＞There is growing interest in the active site structure and catalytic function of metal containing metalloprateins. Polynucelar complexes can act as complex enzyme because the properties of the complexes can be t...

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The synthesis and characterization of a new hexamine compoun...

Continuous-flow electrosynthesis of urea and oxalic acid by CO_(2)-nitrate reduction and glycerol oxidation

中国化学会第四届有机化学学术会议

作者： hong zhou, Zheng-He Peng, Zhi-Quan Pan School of Chemical Engineering and pharmacy of wuhan Institute of Chemical Technology, wuhan 430073 college of chemistry and molecular Science of wuhan university, wuhan 430072

＜正＞It is well known that polyamines are very excellent complex agents for transition metal ions. The metal polyamine complexes have extensive application in molecular catalysis,supramolecular devices and the synthesis of macrocyclic compounds . We have synthesized a new hexamine salts named N.N.N’. N’- tetrakis[2-aminoethyl]hexamethyle nediamine hexahydrobromide [H6L]Br6 by the reaction of hexamethylenediamine with N-tosylaziridine followed by hydrolyzation. The structure of the compound were characterized by element analysis, IR, 1HNMR and ES-MS .

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Chinese Journal of Catalysis 2024年第8期63卷 270-281页

作者： Shuanglong zhou Yue Shi Yu Dai Tianrong zhan Jianping Lai Lei Wang Key Laboratory of Eco-Chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco-Chemical Process and TechnologyCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

Urea and oxalic acid are critical component in various chemical manufacturing ***,achieving simultaneous generation of urea and oxalic acid in a continuous-flow electrolyzer is a ***,we report a continuous-flow electrolyzer equipped with 9-square centime-ter-effective area gas diffusion electrodes(GDE)which can simultaneously catalyze the glycerol oxidation reaction in the anode region and the reduction reaction of CO_(2)and nitrate in the cathode region,producing oxalic acid and urea at both the anode and cathode,*** current density at low cell voltage(0.9 V)remained above 18.7 mA cm^(-2)for 10 consecutive electrolysis cycles(120 h in total),and the Faraday efficiency of oxalic acid(67.1%)and urea(70.9%)did not *** and theoretical studies show that in terms of the formation of C-N bond at the cathode,Pd-sites can provide protons for the hydrogenation process of CO_(2)and NO3-,Cu-sites can promote the generation of*COOH and Bi-sites can stabilize**** addition,in terms of glycerol oxidation,the introduction of Cu and Bi into Pd metallene promotes the oxidation of hydroxyl groups and the cleavage of C-C bond in glycerol molecules,respectively.

关键词： Urea Oxalic acid CO_(2) C-N bond Metallene

Oxidative Methylation of Toluene with Methane over Basic Zeolite Catalysts Promoted with Alkali Metal Bromides and Alkali Metal Oxides

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Chinese Chemical Letters 2000年第9期11卷 827-830页

作者： Ling Ping zhou Wei LI Ke Yi TAO Xuan Wen LI He Xuan LI college of chemistry and molecular Engineering, Peking university, Beijing 100871 Department of chemistry, Nankai university, Tianjin 300071 Peking Univ Coll Chem & Mol Engn Beijing 100871 Peoples R China Nankai Univ Dept Chem Tianjin 300071 Peoples R China

The catalytic effects for the oxidative methylation of toluene with methane over the basic zeolite catalysts prepared by promoting KY, KX, KM, KZSM-5 or KP with alkali-metal bromides and alkali-metal oxides have been investigated comparatively. The alkali-metal bromides promoted substrates are more effective than the alkali-metal oxides promoted systems. Moreover, the NaBr promoted systems are more active than KBr promoted systems. The most effective catalytic system (8wt%NaBr)/KZSM-5 gave a toluene conversion as high as 76.3% and a total C-8 selectivity of 76.4% (styrene/ethylbenzene=9.76) resulting in a total C-8 yield of 58.3%.

关键词： styrene methane oxidative methylation alkali-metal oxides alkali-metal bromides

molecular biological analysis of remains from Jiangjungou Cemetery in Inner Mongolia

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Progress in Natural Science:Materials International 2006年第7期16卷 727-731页

作者： WANG Haijing, LIU Weiqiang, FU Yuqin, zhanG Xiaolei, zhou hui and ZHU hong ( Research Center for Chinese Frontier Archaeology of Jilin university, Changchun 130012, china college of chemistry, Jilin university, Changchun 130023, china college of Life Science, Jilin university, Changchun 130023, china) [a]Research Center for Chinese Frontier Archaeology of Jilin university Changchun China [b]college of chemistry Jilin University Changchun China [c]college of Life Science Jilin University Changchun China

The 364-bp nucleotide sequence in hypervariable region I (HVRI) of mitochondrial DNA is successfully amplified from 9 out of 11 individuals of an ancient population buried in the Jiangjungou Cemetery in Inner Mongolia dated back to the Warring States Period in china. Nine fragments with different variations are obtained. A phylogenetic tree and a multidimensional scaling (MDS) plot are constructed using mtDNA sequences from the ancient population and several modern Asian populations. The results show that ancient population shares a closer genetic relationship with East Asian populations than with North and Central Asian populations. The genetic and historical evidence raise the possibility that the population might be the immigrants from Zhongyuan area, sent by the King Wuling of Zhao State to guard the nation against the attack from Huns.

关键词： mtDNA genetic relationship ancient DNA population.

核苷与碱基的苯胺甲基键合硅胶固定相高效液相色谱分离

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分析测试学报 2003年第3期22卷 28-31页

作者：王忠华周蓉达世禄武汉大学化学与分子科学学院湖北武汉430072

建立苯胺甲基键合硅胶固定相 (PAMS)高效液相色谱分离核苷与碱基的方法 ;研究流动相有机溶剂浓度、磷酸缓冲液 pH值、离子强度对核苷和碱基在该键合固定相上的色谱保留及分离选择性的影响 ,用磷酸缓冲液(pH=4)

关键词：核苷碱基苯胺甲基键合硅胶固定相高效液相色谱分离

Heterogeneous transition dynamic equations and the self-organized origin of the nesting rhythmic beddings in Panzhihua lithosomes

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Science china Earth sciences 2005年第1期48卷 13-20页

作者： WU Jingping, LI Caiwei, BAO Zhengyu, YANG Wenhua, zhou Chenggang, SANG Zunan, LI Fanglin & QU Songsheng college of chemistry and molecular, wuhan university, wuhan 430071, china Faculty of Material Science and Chemical Engineering, china university of Geosciences, wuhan 430074, china Information Department, Zhongshan university, Guangzhou 510000, china Faculty of Earth Science, china university of Geosciences, wuhan 430074, china college of chemistry and molecular Wuhan University Wuhan 430071 China Faculty of Material Science and Chemical Engineering China University of Geosciences Wuhan 430074 China Information Department Zhongshan UniversityGuangzhou 510000China Faculty of Earth Science China University of GeosciencesWuhan 430074China Faculty of Material Science and Chemical Engineering China University of GeosciencesWuhan 430074China college of chemistry and molecular Wuhan UniversityWuhan 430071China

Dynamic equations were developed for heterogeneous phase-transition in a system of coupled nucleation, growth and ripening. Based on these equations, a self-organized origin of small-scale nesting rhythmic beddings in Pahzhihua lithosomes was investigated and the results showed that the beddings could be formed by the cross supersaturated nucleation-crystallization of augite and feldspar successively. This process could be implemented by coupling with supersaturated nucleation, Ostwald ripening, component diffusion and the primary grain diffusion under a proper temperature gradient. The slightly intensive supersaturated nucleation and Ostwald ripening occurring in Panzhihua lithosomes may relate closely to the mineral components such as V-Ti-Maanetite.

关键词： heterogeneous transition, nesting rhythmic bedding, self-organized, Panzhihua.

The crystal structure of a novel dinuclear copper hexamine complex

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The crystal structure of a novel dinuclear copper hexamine c...