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From the same journal

Selective Catalytic Dehydrogenative Oxidation of Bio-Polyols to Lactic Acid

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  • Jiajie Wu
  • Lingyun Shen
  • Sai Duan
  • Zhe Ning Chen
  • Qingshu Zheng
  • Yaoqi Liu
  • Zheming Sun
  • James H. Clark
  • Xin Xu
  • Tao Tu


Publication details

JournalAngewandte Chemie - International Edition
DateAccepted/In press - 8 May 2020
DateE-pub ahead of print (current) - 4 Jun 2020
Number of pages9
Early online date4/06/20
Original languageEnglish


The global demand for lactic acid (LA) is increasing due to its successful application as monomer for the manufacture of bioplastics. Although N-heterocyclic carbene (NHC) iridium complexes are promising molecular catalysts for LA synthesis, their instabilities have hindered their utilization especially in commercial applications. Here, we report that a porous self-supported NHC-iridium coordination polymer can efficiently prevent the clusterization of corresponding NHC-Ir molecules and can function as a solid molecular recyclable catalyst for dehydrogenation of bio-polyols to form LA with excellent activity (97 %) and selectivity (>99 %). A turnover number of up to 5700 could be achieved in a single batch, due to the synergistic participation of the Ba2+ and hydroxide ions, as well as the blockage of unwanted pathways by adding methanol. Our findings demonstrate a potential route for the industrial production of LA from cheap and abundant bio-polyols, including sorbitol.

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2020 Wiley-VCH Verlag GmbH & Co. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

    Research areas

  • bio-polyols, lactic acid, N-heterocyclic carbene iridium complex, oxidative dehydrogenation, self-supporting

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