Chun-Yi Sun

Northeast Normal University, Hsin-ching, Jilin Sheng, China

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Publications (17)79.55 Total impact

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    ABSTRACT: New heteropolyniobates based on a bicapped Keggin-type {VNb14O42(NO3)2} (abbreviated as {VNb14}) cluster have been successfully synthesized by conventional aqueous methods. These clusters are a type of multifunctional material, which exhibit selective adsorption for methanol, ethanol and water and photocatalytic H2 evolution activity.
    CrystEngComm 09/2014; 16(41). DOI:10.1039/C4CE00960F · 3.86 Impact Factor
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    ABSTRACT: A versatile three-dimensional four-fold interpenetrated metal-organic framework [Zn-5(btz)(6)(bdc)(2)(H2O)(2)]center dot 7DMA (1) has been synthesized under solvothermal condition, which has two types of channels running along a and b axes with dimension of approximately 7.5 x 9 angstrom(2) and 8.5 x 11 angstrom(2). With the appropriate and permanent porosity, compound 1 exhibits high adsorption of CO2 and good capability to encapsulate Alq3 (tris(8-hydro-xyquinoline) aluminum) chromophores to realize tunable fluorescence at solid state. To the best of our knowledge, this material is a rare example of MOFs that exhibit good capability to tune luminescence properties of Alq3.
    Inorganic Chemistry Communications 08/2014; 46:248-250. DOI:10.1016/j.inoche.2014.05.016 · 2.06 Impact Factor
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    ABSTRACT: Five isostructural pillared-layer MOFs (metal-organic frameworks) have been constructed by selection of layers and size-alterable pillar ligands. These MOFs show similar structures but different interlayer distances, pore volumes and pore surfaces functionalizations depending on the length and function of pillar ligands. 1-5 display a certain degree of framework stabilities, and also exhibit CO2 uptakes. In addition, 1 can serve as a host for encapsulating I2 and exhibit an outstanding performance in reversible adsorption of iodine molecules. Furthermore, 1-5 can be used to separate dye molecules based on size-exclusion effect and 3 can be employed as column-chromatographic filler to separate Rhodamine B (RB) and Methylene Blue (MB).
    06/2014; 2(36). DOI:10.1039/C4TA01749H
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    ABSTRACT: Three cobalt(II)-containing tungstophosphate compounds, Na8 Li8 Co5 [Co5.5 (H2 O)19 P8 W48.5 O184 ]⋅60 H2 O (1), K2 Na4 Li11 Co5 [Co7 (H2 O)28 P8 W48 O184 ]Cl⋅ 59 H2 O (2), and K2 Na4 LiCo11 [Co8 (H2 O)32 P8 W48 O184 ](CH3 COO)4 Cl⋅47 H2 O (3), have been synthesized and characterized by IR spectroscopy, thermogravimetric analysis, elemental analyses, and magnetic measurements. The pH value impacts the formation of distinct cobalt-linked frameworks. The cyclic cavity of the polyanion accommodates 5.5, 7, and 8 cobalt ions in 1, 2, and 3, respectively. In compounds 1 and 2, each {Co5.5 P8 W48 } and {Co7 P8 W48 } fragment links to four others through multiple {Co-O-W} coordination bonds to generate a two-dimensional network. Compound 3 can be considered as a 3D network based on the {Co-O-W} coordination bonds and the {Co3 (CH3 COO)2 (H2 O)10 } linkers between the {P8 W48 } fragments. Interestingly, acetate ligands have been employed to form the {Co3 (CH3 COO)2 (H2 O)10 } unit, thereby inducing the construction of a 12-connected framework. To the best of our knowledge, compound 3 contains the largest-ever number of cobalt ions in a {P8 W48 }-based polyoxometalate when counterions are taken into account and the {P8 W48 } unit shows the highest number of connections thanks to the carboxyl bridges. The UV/Vis diffuse reflectance spectra of these powder samples indicate that the corresponding well-defined optical absorption associated with Eg can be assessed at 2.58, 2.48, and 2.73 eV and reveal the presence of an optical band gap. The photocatalytic H2 evolution activities of these {P8 W48 }-based compounds are evaluated.
    Chemistry - An Asian Journal 05/2014; 9(2). DOI:10.1002/asia.201300856 · 3.94 Impact Factor
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    ABSTRACT: Metal-organic frameworks (MOFs) are well known for their tunable structure and porosity. Many studies have shown they are promising for various important applications, for which their performance can be further enhanced by encapsulating functional species, such as luminescent guest molecules, within the frameworks. Although numerous MOFs are luminescent, very few emit white light and their quantum yield is usually low. Here we report a strategy to achieve efficient white-light emission by encapsulating an iridium complex in the MOF cavity. A mesoporous blue-emitting MOF is prepared as host to encapsulate a yellow-emitting iridium complex, [Ir(ppy)2(bpy)](+). The resultant composites emit bright white light with good colour quality (for example, Commission International de I'Eclairage coordinates, colour-rendering index and correlated colour temperature of (0.31, 0.33), 84.5 and 5409 K, respectively), and high quantum yield up to 115 °C. This strategy may open new perspectives for developing high-performance energy-saving solid-state lighting materials.
    Nature Communications 11/2013; 4:2717. DOI:10.1038/ncomms3717 · 10.74 Impact Factor
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    ABSTRACT: Unprecedented 3d-4f MOFs encapsulating infinite linear polyiodide chains were firstly reported using iodine molecules as a versatile precursor template. They possess high framework stability in acid/base aqueous solutions. The kinetics of iodine molecule release/recovery and UV-light photocatalytic H2 evolution activities were investigated.
    Chemical Communications 03/2013; DOI:10.1039/c3cc39173f · 6.72 Impact Factor
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    ABSTRACT: Two anionic metal-organic frameworks (MOFs) with 1D mesoporous tubes (1) and chiral mesoporous cages (2) have been rationally constructed by means of a predesigned size-extended hexatopic ligand, namely, 5,5',5''-(1,3,5-triazine-2,4,6-triyl)tris- (azanediyl)triisophthalate (TATAT). Charge neutrality is achieved by protonated dimethylamine cations. Notably, the two MOFs can be used to separate large molecules based on ionic selectivity rather than the size-exclusion effect so far reported in the literature. Owing to the imino triazine backbone and carboxyl groups of the hexatopic ligand, which provide important host-guest interactions, rare solvatochromic phenomena of 1 and 2 are observed on incorporating acetone and ethanol guests. Furthermore, guest-dependent luminescence properties of compound 2 were investigated, and the results show that luminescence intensity is significantly enhanced in toluene and benzene, while quenching effects are observed in acetone and ethanol. Thus, compound 2 may be a potential material for luminescent probes.
    Chemistry - A European Journal 03/2013; 19(11). DOI:10.1002/chem.201203080 · 5.70 Impact Factor
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    ABSTRACT: Six new coordination polymers, namely, [Zn2(L1)2phen2(H2O)2] (1), [M3(L1)2(OH)2 (4,4′-bpy)(H2O)2]·2H2O (M = Cd (2), Co(3)), [Cd5(L1)2(OH)2(trz)4(L3)]·2H2O (4), [Zn(HL2)(4,4′-bpy)] (5) and [Cd3(L2)2(L3)2(H2O)5]·H2O (6) (H2L1 = 4-(1-carboxy-ethoxy)-benzoic acid, H3L2 = 5-(1-carboxy-ethoxy)-isophthalic acid, L3 = 1,2-bis(1,2,4-triazole-1-yl)ethane, phen = 1,10-phenanthroline, 4,4′-bpy = 4,4′-bipyridine, Htrz = 1,2,4-triazole), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction. Compound 1 is a molecular square composed by two Zn ions, two L1 and two phen ligands. Compounds 2 and 3 are isostructural and display 3D frameworks constructed by 1D M-O-M chains. Compound 4 exhibits a 3D 8-connected network with hex topology based on the pentanuclear Cd cluster and the point symbol is (36·418·53·6). Compound 5 shows a 2D wavelike layer with sql topology. Compound 6 reveals a 3D three-fold interpenetrating architecture having (3,4)-connected dmd topology with the point symbol of (4·102)2(42·104). These compounds have been characterized by infrared spectroscopy (IR) and thermal gravimetric analyses (TGA). In addition, the photoluminescent behaviour of 1, 2, and 4-6 has been investigated in detail.
    CrystEngComm 01/2013; 15(34):6769. DOI:10.1039/c3ce40782a · 3.86 Impact Factor
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    ABSTRACT: Introduction: Metal-organic frameworks (MOFs) are a unique class of hybrid porous solids based on metals and organic linkers. Compared to traditional porous materials, they possess predominance of large surface areas, tunable pore size and shape, adjustable composition and functionalized pore surface, which enable them unique advantages and promises for applications in adsorption and release of therapeutic agents. Areas covered: This review addresses MOFs as a new avenue for drug delivery and exhibits their ability to efficiently deliver various kinds of therapeutic agents. It also details the requirements that MOFs need to satisfy for biomedical application, such as toxicological compatibility, stability, particle size, and surface modification. In addition, several approaches used to enhance encapsulation efficiency are summarized and parameters influencing delivery efficiency are also discussed. Expert opinion: Benefiting from the unique advantages of MOFs materials, efficient delivery of various kinds of drugs has been achieved in some MOF materials. However, it is only the outset of MOFs in drug delivery system, and numerous work need to be done before clinical applications, for example, studying their in vivo toxicity, exploring degradation mechanisms so as to establish real stability of MOFs in body's liquid, providing appropriated surface modification avenue for MOFs, and researching in vivo efficiency and pharmacokinetics of drug-loaded MOFs.
    Expert Opinion on Drug Delivery 11/2012; DOI:10.1517/17425247.2013.741583 · 4.12 Impact Factor
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    ABSTRACT: Three coordination polymers, i.e. [Co(HL)(HBDC)]n (1), [Co(HL)(BDC)0.5]n (2) and {[Zn2(H2L)(BTC)2](H4L)(H2O)2}n (3) (L = 2, 2′-(ethanediyl)bis(1H-benzimidazole), H2BDC = 1, 4-benzenedicarboxylic acid, H3BTC = 1, 3, 5-benzene tricarboxylic acid), have been synthesized under hydrothermal conditions based on bis(2-benzimidazole) and two multi-dentate carboxylate ligands, with different metal ions such as ZnII and CoII. The structures of these coordination polymers have been determined by X-ray single‐crystal diffraction. The diverse coordination modes of the H2L ligand and the varying geometries of multi-dentate carboxylate ligands play an important role in the construction of coordination polymers. Various assembly patterns have been observed, including one-dimensional (1D) chain (1), two-dimensional (2D) 3-connected network structure with honeycomb topology (2), and three-dimensional (3D) 3,4-connected porous structure with (63)(65,8) topology (3). Thermal analyses of the three polymers have been performed and discussed. Furthermore, strong room temperature photoluminescence of compound 3 was observed.
    Inorganic Chemistry Communications 10/2012; 24:247-253. DOI:10.1016/j.inoche.2012.05.029 · 2.06 Impact Factor
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    ABSTRACT: A new inorganic–organic hybrid compound constructed from Keggin-type polyoxometalate and cadmium-organic units, namely, [Cd(Htrz)3]2[SiW12O40]·2H2O (1), [Htrz = 1-H-1,2,4-triazole], has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR, TG, and UV–vis absorption spectra. In compound 1, each [SiW12O40]4 − cluster is modified by six [Cd(Htrz)3]2 + metal–organic fragments, meanwhile, each [Cd(Htrz)3]2 + also connects with three [SiW12O40]4 − to built up a binodal (3,6)-connected 2D planar network with the (43)2(46·66·83)-kgd topology. Interestingly, [SiW12O40]4 − cluster exhibits a rare coordination mode acting as a hexadentate ligand, in which all of the six terminal oxygen atoms in the equatorial plane are synchronously participated in coordination. The diffuse reflectivity spectrum shows it can be regarded as a wide gap semiconductor. Moreover, the photocatalytic performance shows good photocatalytic activity for the degradation of Rhodamine B.
    Inorganic Chemistry Communications 06/2012; 20:273–276. DOI:10.1016/j.inoche.2012.03.025 · 2.06 Impact Factor
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    ABSTRACT: Zeolitic Imidazolate Framework-8 (ZIF-8), for the first time for ZIFs, exhibits a remarkable capacity for the anticancer drug 5-fluorouracil (5-FU), around 660 mg of 5-FU/g of ZIF-8, and presents a pH-triggered controlled drug release property. These prove ZIF-8 to be a valuable candidate for delivery of anticancer agents and reveal its potential applications in the treatment of cancer.
    Dalton Transactions 05/2012; 41(23):6906-9. DOI:10.1039/c2dt30357d · 4.10 Impact Factor
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    ABSTRACT: A new organic-inorganic hybrid, [Cu(en)(2)](3){[Cu(en)(2)][H(6)SiNb(18)O(54)]}·22H(2)O (1, en = ethylenediamine) containing the crescent-shaped polyoxoanion [H(6)SiNb(18)O(54)](8-) and copper-organic cations has been successfully synthesized, and elemental analyses, IR spectra, thermogravimetric analyses and single-crystal X-ray diffraction were investigated.
    Dalton Transactions 04/2012; 41(20):6075-7. DOI:10.1039/c2dt30265a · 4.10 Impact Factor
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    ABSTRACT: A chiral nanoporous metal-organic framework (MOF) with high porosity is obtained based on nontoxic zinc and achiral hexadentate ligand. It shows high drug loading and slow release of the proportion of the loaded drug with a complete delivery time of about one week when used as a material for adsorption and delivery of anticancer 5-fluorouracil.
    Advanced Materials 12/2011; 23(47):5629-32. DOI:10.1002/adma.201102538 · 15.41 Impact Factor
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    ABSTRACT: An unprecedented organic-inorganic hybrid {[Cu(6)L(6)(H(2)O)(3)][Nb(10)V(4)O(40)(OH)(2)]}(2)·13H(2)O (1) (L = 1,10-phenanthroline) containing the unreported {Nb(10)V(4)O(40)(OH)(2)}(12-) building blocks has been successfully synthesized and its photoluminescent properties, IR spectra, thermogravimetric analyses and single-crystal X-ray diffraction were investigated.
    Chemical Communications 11/2011; 48(1):103-5. DOI:10.1039/c1cc15684e · 6.72 Impact Factor
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    ABSTRACT: Two new metal-organic frameworks, [Cd2(H2C3PIm)(BDC)4(H2O)3]n (1) and [Zn3(H2C3PIm)3 (BTC)2(H2O)2]n (2) (H2C3PIm=2,2′-(1,3-propanediyl)bis(1H-benzimidazole), H2BDC=1,4-benzenedicarboxylic acid, H3BTC=1,3,5-benzene tricarboxylic acid), have been synthesized hydrothermally and their structures are characterized by single crystal X-ray analysis. Compound 1 presents a 1D columnar structure, and compound 2 exhibits a 2D sheet with novel extra-large rings of 4.82 topology. Both complexes exhibit strong photoluminescence at room temperature.
    Inorganic Chemistry Communications 07/2011; 14(7):1077-1081. DOI:10.1016/j.inoche.2011.03.032 · 2.06 Impact Factor
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    ABSTRACT: A non-interpenetrated 3D porous metal–organic framework [(CH3)2NH2]2[Cd(TATAT)2/3]·4DMF (1) (TATAT = 5,5′,5″-(1,3,5-triazine-2,4,6-triyl)tris(azanediyl)triisophthalate) has been successfully synthesized under solvothermal conditions and characterized by elemental analysis, TGA, and single-crystal X-ray diffraction analysis. Compound 1 exhibits α-Al2O3 (corundum) topology and represents the first metal–organic analog presently known with a natural material topology based on 6-connected organic ligand and tetrahedral metal ion. In addition, the thermal stabilities of the complex and the acid-treated product have been investigated and the results indicate that acid treatment is an efficient way for this compound to improve its thermal stability.
    Inorganic Chemistry Communications 06/2011; 14(6):893–896. DOI:10.1016/j.inoche.2011.03.021 · 2.06 Impact Factor