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  • Wiley  (4)
  • Wang, Zhenpeng  (4)
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  • Wiley  (4)
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  • 1
    Online Resource
    Online Resource
    Hydrogen‐Bonding Catalyzed Ring‐Closing C−O/C−O Metathesis of Aliphatic Ethers over Ionic Liquid under Metal‐Free Conditions
    Wiley ; 2020
    In:  Angewandte Chemie International Edition Vol. 59, No. 29 ( 2020-07-13), p. 11850-11855
    Details
    In: Angewandte Chemie International Edition, Wiley, Vol. 59, No. 29 ( 2020-07-13), p. 11850-11855
    Abstract: O‐heterocycles have wide applications, and their efficient and green synthesis is very interesting. Herein, we report hydrogen‐bonding catalyzed ring‐closing metathesis of aliphatic ethers to O‐heterocycles over ionic liquid (IL) catalyst under metal‐ and solvent‐free conditions. The IL 1‐butylsulfonate‐3‐methylimidazolium trifluoromethanesulfonate ([SO 3 H‐BMIm][OTf] ) is discovered to show outstanding performance, better than the reported catalysts. An interface effect plays an important role in mediating the reaction rate due to the immiscibility between the products and the IL catalyst, and the products can be spontaneously separated. NMR analysis and DFT calculation suggest that a pair of cation and anion of [SO 3 H‐BMIm][OTf] could form three strong H‐bonds with an ether molecule, which catalyze the ether transformation via a cyclic oxonium intermediate. A series of O‐heterocycles including tetrahydrofurans, tetrahydropyrans, morpholines and dioxane can be obtained from their corresponding ethers in excellent yields (e.g., 〉 99 %). This work opens an efficient and metal‐free way to produce O‐heterocycles from aliphatic ethers.
    Type of Medium: Online Resource
    ISSN: 1433-7851 , 1521-3773
    URL: Issue
    URL: Article
    DOI: 10.1002/anie.v59.29
    DOI: 10.1002/anie.202004002
    RVK:
    VA 2100
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2011836-3
    detail.hit.zdb_id: 123227-7
    Location Call Number Limitation Availability
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Hydrogenation of Carbon Dioxide to C 2 –C 4 Hydrocarbons Catalyzed by Pd(P t Bu 3 ) 2 –FeCl 2 with Ionic Liquid as Cocatalyst
    Wiley ; 2019
    In:  ChemSusChem Vol. 12, No. 19 ( 2019-10-08), p. 4390-4394
    Details
    In: ChemSusChem, Wiley, Vol. 12, No. 19 ( 2019-10-08), p. 4390-4394
    Abstract: Direct hydrogenation of CO 2 to C 2+ hydrocarbons is very interesting, but achieving this transformation below 200 °C is challenging and seldom reported. Herein, a homogeneous catalytic system was developed composed of the ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIm][PF 6 ]), Pd(P t Bu 3 ) 2 , FeCl 2 , and the ligand 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos) for hydrogenation of CO 2 under mild conditions, which resulted in C 2 –C 4 hydrocarbons in selectivities up to 98.3 C‐mol % at 180 °C. The combination of [BMIm] [PF 6 ]) with Xantphos endowed the Pd–Fe catalysts with the ability of activating CO 2 and H 2 simultaneously via [HPd(P t Bu 3 )(BMIm‐COO)(BMIm)(PF 6 )Fe] + species, thus catalyzing the formation of C 2 –C 4 hydrocarbons through CO 2 hydrogenation. In addition, this catalytic system is stable and recyclable, which may have promising applications.
    Type of Medium: Online Resource
    ISSN: 1864-5631 , 1864-564X
    URL: Issue
    URL: Article
    DOI: 10.1002/cssc.v12.19
    DOI: 10.1002/cssc.201901820
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2411405-4
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Sub‐10‐nm Ag/AgX (X = Br,Cl) Nanoparticles: Superior Visible‐Light‐Driven Plasmonic Photocatalysts
    Wiley ; 2022
    In:  Advanced Materials Interfaces Vol. 9, No. 9 ( 2022-03)
    Details
    In: Advanced Materials Interfaces, Wiley, Vol. 9, No. 9 ( 2022-03)
    Abstract: While the past decade has witnessed great successes in silver/silver halide‐based (Ag/AgX, X = Cl,Br) plasmonic photocatalysts, a facile fabrication of ultrafine Ag/AgX nanoparticles (NPs), which is recognized to be an efficient avenue for boosted catalytic performances, still remains a formidable challenge. Ultrasmall sub‐10‐nm Ag/AgX, which are discretely distributed on graphene oxide (GO, sub10‐Ag/AgX/GO), can be easily fabricated by an oxidation–halogenation treatment of Ag/GO precursors of sub‐10‐nm AgNPs (sub10‐Ag/GO). Significantly, compared to Ag/AgCl/GO and Ag/AgBr/GO of hundred‐nanometer‐sized Ag/AgX, the sub10‐Ag/AgCl/GO and sub10‐Ag/AgBr/GO display substantially enhanced photocatalytic activity by a factor of ≈16.4 and 38.2 times, respectively, despite their inconspicuous visible‐light absorptions. The ultrafine size of the sub10‐Ag/AgX and their grafting on but not being enwrapped by GO, which cooperatively facilitate a superior spatial separation capability of photogenerated electrons and holes, a satisfactory accessibility/availability of the abundantly exposed active sites, and consequently promote a more efficient utilization of photogenerated charge carriers, play important roles in their superior catalytic activities. The investigation initiates a new way for ultrafine Ag‐based nanocomposites, and by a simple treatment of chemically modifiable ultrasmall‐sized precursors, it provides new clues for other desired ultrafine‐sized advanced nanomaterials that are difficult to synthesize via conventional protocols.
    Type of Medium: Online Resource
    ISSN: 2196-7350 , 2196-7350
    URL: Issue
    URL: Article
    DOI: 10.1002/admi.v9.9
    DOI: 10.1002/admi.202102077
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2750376-8
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Hydrogen‐Bonding Catalyzed Ring‐Closing C−O/C−O Metathesis of Aliphatic Ethers over Ionic Liquid under Metal‐Free Conditions
    Wiley ; 2020
    In:  Angewandte Chemie Vol. 132, No. 29 ( 2020-07-13), p. 11948-11953
    Details
    In: Angewandte Chemie, Wiley, Vol. 132, No. 29 ( 2020-07-13), p. 11948-11953
    Abstract: O‐heterocycles have wide applications, and their efficient and green synthesis is very interesting. Herein, we report hydrogen‐bonding catalyzed ring‐closing metathesis of aliphatic ethers to O‐heterocycles over ionic liquid (IL) catalyst under metal‐ and solvent‐free conditions. The IL 1‐butylsulfonate‐3‐methylimidazolium trifluoromethanesulfonate ([SO 3 H‐BMIm][OTf] ) is discovered to show outstanding performance, better than the reported catalysts. An interface effect plays an important role in mediating the reaction rate due to the immiscibility between the products and the IL catalyst, and the products can be spontaneously separated. NMR analysis and DFT calculation suggest that a pair of cation and anion of [SO 3 H‐BMIm][OTf] could form three strong H‐bonds with an ether molecule, which catalyze the ether transformation via a cyclic oxonium intermediate. A series of O‐heterocycles including tetrahydrofurans, tetrahydropyrans, morpholines and dioxane can be obtained from their corresponding ethers in excellent yields (e.g., 〉 99 %). This work opens an efficient and metal‐free way to produce O‐heterocycles from aliphatic ethers.
    Type of Medium: Online Resource
    ISSN: 0044-8249 , 1521-3757
    URL: Issue
    URL: Article
    DOI: 10.1002/ange.v132.29
    DOI: 10.1002/ange.202004002
    RVK:
    VA 2100
    RVK:
    VN 5020
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 505868-5
    detail.hit.zdb_id: 506609-8
    detail.hit.zdb_id: 514305-6
    detail.hit.zdb_id: 505872-7
    detail.hit.zdb_id: 1479266-7
    detail.hit.zdb_id: 505867-3
    detail.hit.zdb_id: 506259-7
    Location Call Number Limitation Availability
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    Online Resource
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