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@ARTICLE{Zhang:837917,
      author       = {Zhang, Chaofeng and Li, Hongji and Lu, Jianmin and Zhang,
                      Xiaochen and MacArthur, Katherine and Heggen, Marc and Wang,
                      Feng},
      title        = {{P}romoting {L}ignin {D}epolymerization and {R}estraining
                      the {C}ondensation via an {O}xidation-{H}ydrogenation
                      {S}trategy},
      journal      = {ACS catalysis},
      volume       = {7},
      number       = {5},
      issn         = {2155-5435},
      address      = {Washington, DC},
      publisher    = {ACS},
      reportid     = {FZJ-2017-06687},
      pages        = {3419 - 3429},
      year         = {2017},
      abstract     = {For lignin valorization, simultaneously achieving the
                      efficient cleavage of ether bonds and restraining the
                      condensation of the formed fragments represents a challenge
                      thus far. Herein, we report a two-step
                      oxidation–hydrogenation strategy to achieve this goal. In
                      the oxidation step, the O2/NaNO2/DDQ/NHPI system selectively
                      oxidizes CαH–OH to Cα═O within the β-O-4 structure.
                      In the subsequent hydrogenation step, the α-O-4 and the
                      preoxidized β-O-4 structures are further hydrogenated over
                      a NiMo sulfide catalyst, leading to the cleavage of
                      Cβ–OPh and Cα–OPh bonds. Besides the transformation of
                      lignin model compounds, the yield of phenolic monomers from
                      birch wood is up to $32\%$ by using this two-step strategy.
                      The preoxidation of CαH–OH to Cα═O not only weakens
                      the Cβ–OPh ether bond but also avoids the condensation
                      reactions caused by the presence of Cα+ from
                      dehydroxylation of CαH–OH. Furthermore, the NiMo sulfide
                      prefers to catalyze the hydrogenative cleavage of the
                      Cβ–OPh bond connecting with a Cα═O rather than
                      catalyze the hydrogenation of Cα═O back to the original
                      CαH–OH, which further ensures and utilizes the advantages
                      of preoxidation.},
      cin          = {ER-C-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000401054300041},
      doi          = {10.1021/acscatal.7b00148},
      url          = {https://juser.fz-juelich.de/record/837917},
}