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Hydrothermal Synthesis,Crystal Structure and Electrochemical Properties of the Copper(II) Complex [Cu_4O_4(phen)_4(ClC_6H_4COO)_2(H_2O)_2]·(H_2O)_3

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1331-1336页

作者： LI Wei LI Chang-Hong YANG Ying-Qun kuang yun-Fei Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China Department of Chemical Engineering Hunan Institute of Technology Hengyang 421008 China

The title complex of copper（Ⅱ） with m-chlorobenzoic acid, 1,10-phenanthroline （phen） and copper perchlorate has been synthesized and characterized in the solvent mixture of water and methanol. Crystal data for this complex： triclinic, space group PI^-, a = 1.06853（12）, b = 1.30740（16）, c = 1.49546（17） nm, α= 101.791（2）,β = 103.413（2）, γ = 105.815（2）°, V= 1.8736（4） nm^3, Mr = 904.67, Dc = 1.604 g/cm^3, Z = 2,/7（000） = 924,μ = 1.34 mm^-1, GOOF = 1.049, the final R = 0.0324 and wR = 0.0797. The structure analysis shows that a chair-like structure [Cu4O4] is defined by three quadrilaterals shaped by four copper and four oxygen atoms, and every copper ion is coordinated by three oxygen atoms from three wate： molecules and two nitrogen atoms from one 1,10-phenanthroline molecule, giving a distorted square-pyramidal coordination geometry. The CV analysis results indicate that the electron transfer in the electrode reaction is quasi-reversible.

关键词： copper(Ⅱ) complex hydrothermal synthesis electrochemical property

Synthesis, Crystal Structure and Electrochemical Properties of a One-dimensional Chain Coordination Polymer [Cu(phen)(2,4,6-TMBA)_2(H_2O)]_n

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Chinese Journal of Structural Chemistry 2008年第2期27卷 210-214页

A one-dimensional chain coordination polymer [Cu（phen）（2,4,6-TMBA）2（H2O）]n has been synthesized by reacting 2,4,6-trimethyl-benzoic acid, 1,10-phenanthroline and Cu（Ⅱ） perchlorate and its structure was characterized. Crystal data for this complex： tetragonal, space group I41, a = 2.0293（3）, b = 2.0293（3）, c = 1.3758（2） nm, α =β= γ = 90°, V= 5.6657（13） nm3, Dc= 1.379 g/cm3, Z = 8, μ（MoKa） = 0.815 mm-1, Mr = 588.14, F（000） = 2456, S = 1.047, R = 0.0459 and wR = 0.1053. The crystal structure shows that two neighboring Cu（Ⅱ） ions are linked together by one bridging-chelating 2,4,6-trimethyl-benzoic group, forming a one-dimensional chain structure. Each Cu（Ⅱ） ion is coordinated with two nitrogen atoms from one 1,10-phenanthroline molecule, three oxygen atoms from three 2,4,6-trimethyl-benzoic acid molecules and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. The cyclic voltammetry behavior of the complex was also investigated.

关键词： Cu(Ⅱ) coordination polymer crystal structure electrochemical property analysis

Hydrothermal Synthesis and Crystal Structure of Complex Mn_2(phen)_2(p-MBA)_4(H_2O)

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Chinese Journal of Structural Chemistry 2008年第2期27卷 149-152页

作者： YANG Ying-Qun LI Chang-Hong LI Wei kuang yun-Fei Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China Department of Chemical Engineering Hunan Institute of Technology Hengyang 421002 China

A novel Mn（Ⅱ） complex Mn2（phen）2（p-MBA）4（H2O） has been hydrothermally synthesized by the reaction of p-methyl benzoic acid （p-MBA） with 1,10-phenanthroline （phen）. Crystal data for this complex： monoclinic, space group C2/c, a= 2.3328（3）, b =1.5549（2）, c = 1.5557（2） nm, β = 121.726（2）°, V= 4.7997（11） nm^3, Mr = 1028.85, Dc = 1.424 g/cm^3, Z = 4, F（000） = 2128, μ（MoKa） = 0.590mm^-1, GOOF = 1.060, R = 0.0333 and wR = 0.0767. In the crystal, each Mn（Ⅱ） ion is coordinated by two nitrogen atoms from one o-phenanthroline molecule, three oxygen atoms from three p-methyl benzoic acids and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. Two neighboring Mn（Ⅱ） ions are bridged by two p-methyl benzoic acid groups and one water molecule, and their end positions are respectively coordinated by one 1,10-phenanthroline and one p-methyl benzoic acid molecule, giving a binuclear cage structure, of which the Mn（Ⅱ）…Mn（Ⅱ） distance is 0.3502 nm.

关键词： Mn(Ⅱ) complex hydrothermal synthesis crystal structure

Hydrothermal Synthesis, Crystal Structure and Properties of a New Binuclear Cage-like Yttrium(Ⅲ) Complex Y(TMBA)(phen)

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Chinese Journal of Structural Chemistry 2020年第11期39卷 2016-2020页

作者： LI Chang-Hong kuang yun-Fei LI Wei LI Yu-Lin School of Materials and Chemical Engineering Hunan Institute of TechnologyHengyang 421002China School of Chemistry and Materials Science Hengyang Normal UniversityHengyang 421008China

A new binuclear cage-like yttrium(Ⅲ) complex Y2(TMBA)6(phen)2(1) with yttrium nitrate, 2,4,6-trimethylbenzoic acid(TMBA) and 1,10-phenanthroline(phen) was synthesized. It crystallizes in the triclinic space group P1 with a = 11.9086(15), b = 12.4843(17), c = 14.2101(18) ?, α = 104.977(4), β = 111.750(4), γ = 95.874(5)o, V = 1848.8(4) ?3, Dc = 1.363 g/cm3, Z = 1, μ(Mo Ka) = 1.627, F(000) = 788, the final GOOF = 1.039, R = 0.0353 and w R = 0.0826. The whole molecule consists of two yttrium ions bridged by four 2,4,6-trimethylbenzoic acid anions. The Y(Ⅲ) ion is coordinated by eight atoms to give a distorted square antiprism coordination geometry. The TG analysis and fluorescent properties of 1 were studied.

关键词： binuclear yttrium(Ⅲ)complex thermal stability fluorescent property

Mutation of Residue Arginine^18 of Cytochrome b559 α-Subunit and its Effects on Photosystem Ⅱ Activities in Chlamydomonas reinhardtii

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Journal of Integrative Plant Biology 2007年第7期49卷 1054-1061页

作者： Jing-Jing Ma Liang-Bi Li Yu-Xiang Jing Ting-yun kuang Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany Chinese Academy of Sciences Beijing 100093 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

It has been known that arginine is used as the basic amino acid in the α-subunit of cytochrome bsss （Cyt bsss） except histidine. However, previous studies have focused on the function of histidine in the activities of photosystem （PS） Ⅱ and there are no reports regarding the structural and/or functional roles of arginine in PSll complexes. In the present study, two arginine18 （R18） mutants of Chlamydomonas reinhardtii were constructed using site-directed mutagenesis, in which R18 was replaced by glutamic acid （E） and glycine （G）. The results show that the oxygen evolution of the PSII complex in the R18G and R18E mutants was approximately 60% of wild-type （WT） levels and that, after irradiation at high light intensity, oxygen evolution for the PSll of mutants was reduced to zero compared with 40% in WT cells. The efficiency of light capture by PSll （Fv/Fm） of R18G and R18E mutants was approximately 42%-46% that of WT cells. Furthermore, levels of the α-subunit of Cyt bsss and PsbO proteins were reduced in thylakoid membranes compared with WT. Overall, these data suggest that R18 plays a significant role in helping Cyt bss9 maintain the structure of the PSll complex and its activity, although it is not directly bound to the heme group.

关键词： Chlamydomonas reinhardtii chloroplast transformation cytochrome b559 mutation photosystem Ⅱ.

Synthesis and Fluorescent and Magnetic Properties of a New Europium Complex Eu(C_(20)H_(14)O_(3)N)_(3)(2,2’-bipy)(H_(2)O)·H_(2)O

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Chinese Journal of Structural Chemistry 2021年第4期40卷 507-511,408页

作者： YANG Ying-Qun kuang yun-Fei ZHU Xiao-Ming Key Laboratory of Functional Metal-organic Compounds of Hunan Province&Key Laboratory of Functional Organometallic Materials of Hunan Province College Hengyang 421008China Department of Chemistry and Materials Science Hengyang Normal UniversityHengyang 421008China

A new europium(Ⅲ)complex Eu(C_(20)H_(14)O_(3)N)_(3)(2,2'-bipy)(H2O)·H2O has been synthesized with2-diphenylanine carbonyl benzoic acid and 2,2'-bipyridine as *** data for the complex are as follows:triclinic,space group Pi,a=11.3334(5),b=16.0883(7),c=17.0116(8)A,α=70.411(4)o,β=82.435(4)o,γ=85.095(4)o,V=2894.0(2)A^(3),Dc=1.484 g/cm^(3),Z=2,μ=1.15 mm^(-1),F(000)=1320 and the final R=0.0447 and w R=*** Eu(Ⅲ)ion is coordinated by nine atoms to give a monocapped square antiprism coordination *** complex shows two intense fluorescence emission bands arising from the transitions of Eu^(3+):^(5)D0→^(7)F_(1)(592 nm)and ^(5)D_(0)→^(7)F_(2)(616 nm),*** reported is the magnetic property of the *** complex exhibits antiferromagnetism in the temperature range of 300~2 K.

关键词： europium(Ⅲ)complex crystal structure fluorescent and magnetic properties

Synthesis,Crystal Structure and Electrochemical Properties of the Complex Cd(α-FRA)_2(Phen)(H_2O)

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Chinese Journal of Structural Chemistry 2006年第11期25卷 1409-1413页

作者： YANG Ying-Qun LI Chang-Hong LI Wei GUO Dong-Cai kuang yun-Fei Department of Chemistry and Materials Science Hengyang Normal University Hengyang 421008 China Department of Chemical Engineering Hunan Institute of Technology Hengyang 421008 China College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

A new cadmium complex Cd（a-FRA）2（Phen）（H20） was synthesized by selfassembly reaction of a-furoic acid, phenanthroline （phen）, and Cd（NO3）2.4H2O. It crystallizes in monoclinic, space group P21/c, with a = 0.6799（2）, b = 1.7780（6）, c = 1.6866（6） nm, β= 94.912（6）°, V= 2.0315（12） nm^3, Dc = 1.742 g/cm^3, Z = 4, M, = 532.77, μ（MoKa） = 1.124 mm^-1, F（000） = 1064, R = 0.0411, wR = 0.0790. The structural analysis shows that the cadmium ion is coordinated with two nitrogen atoms from one phen molecule and four oxygen atoms respectively from two a-furoic acids and one water molecule, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also discussed, which shows that the electrode process is irreversible in the electrode reactor.

关键词： cadmium(Ⅱ) complex crystal structure electrochemical property

Insignin A, A Novel C_21-Steroidal Aglycone from Biondia insignis

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Chinese Chemical Letters 2000年第12期11卷 1065-1068页

作者： Yuan Hu ZHANG Yue Mao SHEN Yuan Ying WEN Ting yun kuang Laboratory of Phytochemistry and Department of Plant Biotechnology Kunming Institute of BotanyChinese Academy of SciencesKunming 650204 Laboratory of Phytochemistry Institute of BotanyChinese Academy of SciencesBeijing 100093

Insignin A, a new C21-steroidal aglycone having the rare 15,16-seco pregnane skeleton was isolated from the acidic hydrolysis part of the 95% EtOH extract of Biondia insignis. It's structure was identified to be 15R,... 详细信息

关键词： Asclepiadaceae Biondia insignis C21-steroidal aglycone insignin A<

Photosynthetic Characterization of the Plant Dicranopteris dichotoma Bernh. in a Rare Earth Elements Mine

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Journal of Integrative Plant Biology 2005年第9期47卷 1092-1100页

作者： Li-Feng WANG Hong-Bing JI Ke-Zhi BAI Liang-Bi LI Ting-yun kuang Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China The Subcenter of the Environmental Processes National Engineering Center for Urban Environmental Pollution Control the Capital Normal University Beijing 100037 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

In order to investigate the distribution of rare earth elements （REEs） in the natural hyperaccumulator fern Dicranopteris dichotoma Bernh. and to characterize this plant photosynthetically, concentrations of REEs in D. dichotoma from mines mining heavy and light REEs （HREEs and LREEs, respectively）, as well as in D. dichotoma from an area in which no mining occurred, in southern Jiangxi Province were determined using inductively coupled plasma-mass spectrometry. The REE concentrations in the lamina of D. dichotoma were in the order LREEs mine 〉 HREEs mine 〉 non-mining area. The maximum REE content in the lamina of D. dichotoma from the LREE mine was approximately 2 648 mg/kg dry weight. The photosynthetic activity of D. dichotoma from areas of HREE and LREE mines was improved by the presence of high concentrations of REEs in the lamina compared with D. dichotoma from the non-mining area. However, this enhancement varied according to the concentrations of the REEs, as well as their type. In addition, 77K fluorescence, electron transport rate, and chlorophyll-protein complex studies showed that the enhancement of the photosynthetic activity of D. dichotoma from HREE mines was mainly due to an increase in the chlorophyll-protein complex of the reaction center of photosystem （PS） Ⅰ, whereas the enhancement observed in D. dichotoma from LREE mines was due to an increase in the internal antennae chlorophyll-protein complex of PS Ⅱ and greater light energy distribution to the light-harvesting chlorophyll-protein complex of PS Ⅱ.

关键词： chlorophyll-protein complex Dicranopteris dichotoma electron transport rate rare earth elements (REEs).