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  1. Article ; Online: Hydrothermal synthesis, structure, and catalytic properties of a (4,6)-connected framework constructed from Keggin-type polyoxometalate units and tetranuclear copper complexes

    Jia-Yu Sun / Zi-Lan Wang / Zhong Zhang / Guo-Cheng Liu / Xiu-Li Wang

    Polyoxometalates, Vol 3, Iss 1, p

    2024  Volume 9140039

    Abstract: Under hydrothermal conditions, a Keggin-type polyoxometalate-based metal–organic complex, H4{[Cu4(EDDP)2(H2O)5]1.5(SiW12O40)}∙7.5H2O (CuW-EDDP, H4EDDP = ethylene-diamine-N,N'-dipropionic acid), was synthesized by reacting Na10[A-α-SiW9O34]·18H2O and ... ...

    Abstract Under hydrothermal conditions, a Keggin-type polyoxometalate-based metal–organic complex, H4{[Cu4(EDDP)2(H2O)5]1.5(SiW12O40)}∙7.5H2O (CuW-EDDP, H4EDDP = ethylene-diamine-N,N'-dipropionic acid), was synthesized by reacting Na10[A-α-SiW9O34]·18H2O and CuCl2·2H2O in the presence of H4EDDP ligands and characterized by powder and single-crystal X-ray diffraction, infrared spectroscopy, elemental analysis, and thermogravimetry. Interestingly, CuW-EDDP exhibited a three-dimensional structure with (4,6)-connected constructed from [SiW12O40]4− units and tetranuclear Cu complexes [Cu4(EDDP)2(H2O)5]. As an effective heterogeneous catalyst, CuW-EDDP exhibited excellent performance, good reusability, and structural stability in the selective oxidation of methyl phenyl sulfide with high conversion (100%) and selectivity (98%) within 30 min. Furthermore, the catalytic activity of CuW-EDDP in the oxidation of other sulfide derivatives was investigated.
    Keywords polyoxometalates ; keggin-type ; metal–organic complex ; catalytic oxidation ; sulfides ; Inorganic chemistry ; QD146-197
    Subject code 540
    Language English
    Publishing date 2024-03-01T00:00:00Z
    Publisher Tsinghua University Press
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article: Influence of different metal ions on the assembly, structures, and properties of two complexes based on the semi-rigid bis(pyridyl)-bis(amide) ligand and 4,4′-oxybis(benzoic acid)

    Lin, Hong-Yan / Guo-Cheng Liu / Jia-Feng Lin / Xiang Wang / Yuan Tian

    Zeitschrift für Naturforschung. 2018 June 27, v. 73, no. 6

    2018  

    Abstract: Two transitional metal complexes, [Zn(oba)(3-bpcd)]n (1) and [Cd(oba)(3-bpcd)0.5]n (2) [H2oba= 4,4′-oxybis(benzoic acid), 3-bpcd=N,N′-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide], have been hydrothermally synthesized and structurally characterized by ... ...

    Abstract Two transitional metal complexes, [Zn(oba)(3-bpcd)]n (1) and [Cd(oba)(3-bpcd)0.5]n (2) [H2oba= 4,4′-oxybis(benzoic acid), 3-bpcd=N,N′-bis(pyridin-3-yl)cyclohexane-1,4-dicarboxamide], have been hydrothermally synthesized and structurally characterized by elemental analyses, infrared spectra, powder X-ray diffraction, thermogravimetric and single-crystal X-ray diffraction. Complex 1 possesses a three-fold interpenetrating network based on layers with a 4-connected sql topology. Complex 2 is a layered framework constructed by the oba anions and 3-bpcd ligands, which represents a binodal (3,4)-connected {62.10}{6} topology. The adjacent layers of complex 2 are further linked by hydrogen bonding interactions to build a three-dimensional supramolecular architecture. The differences of metal ions in coordination modes show a significant effect on the final structures of the Zn(II)/Cd(II) complexes. The photocatalytic activities and the fluorescence sensing properties of complexes 1 and 2 were investigated.
    Keywords anions ; benzoic acid ; cadmium ; fluorescence ; hydrogen bonding ; ligands ; metal ions ; photocatalysis ; thermogravimetry ; topology ; X-ray diffraction ; zinc
    Language English
    Dates of publication 2018-0627
    Size p. 359-368.
    Publishing place De Gruyter
    Document type Article
    ISSN 1865-7117
    DOI 10.1515/znb-2017-0163
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Metal/Carboxylate-Induced Versatile Structures of Nine 0D → 3D Complexes with Different Fluorescent and Electrochemical Behaviors

    Guo-Cheng Liu / Xue Lu / Xiao-Wu Li / Xiu-Li Wang / Na Xu / Yan Li / Hong-Yan Lin / Yong-Qiang Chen

    ACS Omega, Vol 4, Iss 17, Pp 17366-

    2019  Volume 17378

    Keywords Chemistry ; QD1-999
    Language English
    Publishing date 2019-10-01T00:00:00Z
    Publisher American Chemical Society
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article: Temperature-controlled formation of Anderson-type compounds and their conversion to [γ-Mo8O26]4−-based variants using pendent ligands

    Tian, Ai-xiang / Ting-ting Li / Yan Tian / Huai-ping Ni / Xue-bin Ji / Jia-ni Liu / Guo-cheng Liu / Jun Ying

    Zeitschrift für Naturforschung. 2017 Sept. 26, v. 72, no. 9

    2017  

    Abstract: By tuning the reaction temperature, two Anderson- and two [γ-Mo₈O₂₆]⁴⁻-based compounds decorated by pendent organic ligands, [Cuᴵᴵ₉(bpz)₂(pz)₂(H₂O)₂₄][H₂(Cr(OH)₅Mo₆O₁₉)₄]·11H₂O (1), [Cuᴵᴵ(bpz)₂(H₂O)₂(γ-H₄Mo₈O₂₆)]·2H₂O (2), [Cuᴵᴵ₂(tea)₂(H₂O)₆(HCr(OH)₆Mo₆O₁ ...

    Abstract By tuning the reaction temperature, two Anderson- and two [γ-Mo₈O₂₆]⁴⁻-based compounds decorated by pendent organic ligands, [Cuᴵᴵ₉(bpz)₂(pz)₂(H₂O)₂₄][H₂(Cr(OH)₅Mo₆O₁₉)₄]·11H₂O (1), [Cuᴵᴵ(bpz)₂(H₂O)₂(γ-H₄Mo₈O₂₆)]·2H₂O (2), [Cuᴵᴵ₂(tea)₂(H₂O)₆(HCr(OH)₆Mo₆O₁₈)₂]· 6H₂O (3) and [Agᴵ(bpz)(H₂O)(γ-H₄Mo₈O₂₆)₀.₅] (4) (bpz=4-butyl-1H-pyrazole, pz=1H-pyrazole, tea=2-[1,2,4]triazol-4-yl-ethylamine), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction analysis, IR spectra and elemental analyses. In compound 1, there are two kinds of tri-nuclear Cuᴵᴵ clusters induced by bpz and pz ligands, respectively. Four Anderson-type anions are linked by these tri-nuclear clusters to form a “W”-type subunit. In compound 2, the [Cu(bpz)₂(H₂O)₂]²⁺ subunits connect the γ-Mo₈ anions to construct a chain. The remaining two non-coordinated N donors in [Cu(bpz)₂(H₂O)₂]²⁺ further link two adjacent γ-Mo₈ anions through Mo–N bonds. In compound 3, there exists a bi-nuclear Cuᴵᴵ cluster [Cu₂(tea)₂(H₂O)₆]⁴⁺. The discrete bi-nuclear Cuᴵᴵ clusters and the CrMo₆ anions link each other through abundant hydrogen bonding interactions. In compound 4, the [Ag(bpz)(H₂O)]⁺ subunits connect γ-Mo₈ anions to build a zigzag chain. The chains are further fused by other [Ag(bpz)(H₂O)]⁺ cations to form a grid-like layer. There still exist Mo–N bonds in 4. We also have investigated the electrochemical and photocatalytic properties of 1–4.
    Keywords X-ray diffraction ; anions ; cations ; chromium ; copper ; electrochemistry ; hydrogen ; hydrogen bonding ; ligands ; photocatalysis ; silver ; tea ; temperature
    Language English
    Dates of publication 2017-0926
    Size p. 655-664.
    Publishing place De Gruyter
    Document type Article
    ISSN 1865-7117
    DOI 10.1515/znb-2017-0069
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Anatomical Study on the Multi-Ovule Development and Abortion of Hanfu Apple

    Xu-yuan YANG / Huai-yu MA / Guo-cheng LIU / De-guo LÜ / Si-jun QIN / Guo-dong DU

    Journal of Integrative Agriculture, Vol 13, Iss 4, Pp 770-

    2014  Volume 777

    Abstract: The terminal flower buds of 6-yr-old Hanfu apple were used to study the ovule development, ovular characteristics, cell death of abortive ovules, and dynamic change of starch grain quantity in the embryo sac with paraffin slices and terminal ... ...

    Abstract The terminal flower buds of 6-yr-old Hanfu apple were used to study the ovule development, ovular characteristics, cell death of abortive ovules, and dynamic change of starch grain quantity in the embryo sac with paraffin slices and terminal deoxynucleotidyl transferase-mediated fluorescein deoxyuridine triphosphate nick-end labeling (TUNEL) system. Four anatropous ovules in each ventricle could be observed before flowering. With the developing of floral organ, the bulk of normal ovules enlarged in each ventricle, the mature embryo sac differentiated into nucellus, and the egg cell developed into zygote by double fertilization. A large number of starch grains were observed during pollen tube growth and double fertilization, which guaranteed basic nutrient supply in the normal development of ovules. Moreover, abortion phenomenon of runtish ovules emerged at the stages of mature embryo sac, double fertilization and zygote development. The abortion characteristics included deformity of ovule development, degradation of nucellus tissue, separation between funiculus and ovule, abnormality of four-nucleate embryo sac, as well as development interruption of mature embryo sac. TUNEL analysis proved that ovule abortion was programmed cell death.
    Keywords Hanfu apple ; multi-ovule ; abortion ; programmed cell death ; starch grain ; Agriculture (General) ; S1-972
    Subject code 580
    Language English
    Publishing date 2014-04-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article: Anatomical Study on the Multi-Ovule Development and Abortion of Hanfu Apple

    YANG, Xu-yuan / De-guo LÜ / Guo-cheng LIU / Guo-dong DU / Huai-yu MA / Si-jun QIN

    Chinese Academy of Agricultural Sciences Journal of integrative agriculture. 2014 Apr., v. 13

    2014  

    Abstract: The terminal flower buds of 6-yr-old Hanfu apple were used to study the ovule development, ovular characteristics, cell death of abortive ovules, and dynamic change of starch grain quantity in the embryo sac with paraffin slices and terminal ... ...

    Abstract The terminal flower buds of 6-yr-old Hanfu apple were used to study the ovule development, ovular characteristics, cell death of abortive ovules, and dynamic change of starch grain quantity in the embryo sac with paraffin slices and terminal deoxynucleotidyl transferase-mediated fluorescein deoxyuridine triphosphate nick-end labeling (TUNEL) system. Four anatropous ovules in each ventricle could be observed before flowering. With the developing of floral organ, the bulk of normal ovules enlarged in each ventricle, the mature embryo sac differentiated into nucellus, and the egg cell developed into zygote by double fertilization. A large number of starch grains were observed during pollen tube growth and double fertilization, which guaranteed basic nutrient supply in the normal development of ovules. Moreover, abortion phenomenon of runtish ovules emerged at the stages of mature embryo sac, double fertilization and zygote development. The abortion characteristics included deformity of ovule development, degradation of nucellus tissue, separation between funiculus and ovule, abnormality of four-nucleate embryo sac, as well as development interruption of mature embryo sac. TUNEL analysis proved that ovule abortion was programmed cell death.
    Keywords apoptosis ; apples ; buds ; embryo sac ; flowering ; flowers ; fluorescein ; nucellus ; ova ; pollen tubes ; starch granules ; zygote
    Language English
    Dates of publication 2014-04
    Size p. 770-777.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 2660426-7
    ISSN 2095-3119
    ISSN 2095-3119
    DOI 10.1016/S2095-3119(13)60409-8
    Database NAL-Catalogue (AGRICOLA)

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