Dehydrogenation of anhydrous methanol at room temperature by o-aminophenol-based photocatalysts

作者：Wakizaka Masanori; Matsumoto Takeshi; Tanaka Ryota; Chang Ho Chol^*

来源：Nature Communications, 2016, 7(1): 12333.

DOI：10.1038/ncomms12333

Dehydrogenation of anhydrous methanol is of great importance, given its ubiquity as an intermediate for the production of a large number of industrial chemicals. Since dehydrogenation of methanol is an endothermic reaction, heterogeneous or homogeneous precious-metal-based catalysts and high temperatures are usually required for this reaction to proceed. Here we report the photochemical dehydrogenation of anhydrous methanol at room temperature catalysed by o-aminophenol (apH(2)), o-aminophenolate (apH(-)) and the non-precious metal complex trans-[Fe-II(apH)(2)(MeOH)(2)]. Under excitation at 289 +/- 10 nm and in the absence of additional photosensitizers, these photocatalysts generate hydrogen and formaldehyde from anhydrous methanol with external quantum yields of 2.9 +/- 0.15%, 3.7 +/- 0.19% and 4.8 +/- 0.24%, respectively, which are the highest values reported so far to the best of our knowledge. Mechanistic investigations reveal that the photo-induced formation of hydrogen radicals triggers the reaction.

• 出版日期2016-7