Abstract Chemoselective hydrogenation of unsaturated aldehyde to unsaturated alcohol has attracted growing interests in recent years due to its widespread applications in fine chemicals. However, the hydrogenation of the C=O bond was thermodynamically and kinetically unfavorable over the hydrogenation of the C=C bond. Thus, to obtain the unsaturated alcohol from the unsaturated aldehyde is very difficult in most of the catalytic systems. In this work, ZnAl-hydrotalcite-supported cysteine-capped Au25 nanoclusters were used as the precatalysts for chemoselective hydrogenation of cinnamaldehyde to cinnamyl alcohol. The catalyst showed stable high selectivity (~ 95%) at prolonged reaction time and complete conversion of the substrate. According to the results of the control experiments, the in-situ DRIFTS of the substrate under high pressure of hydrogen and the 27Al MAS-NMR spectroscopy, we proposed that the difference of the preferential adsorption of the C=O bond to that of the C=C bond was derived from the nature of the support of the gold catalysts.

中文翻译：

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负载金纳米催化剂上肉桂醛制备肉桂醇

摘要 不饱和醛化学选择性加氢制不饱和醇近年来因其在精细化工领域的广泛应用而受到越来越多的关注。然而，C=O 键的氢化在热力学和动力学上都比 C=C 键的氢化更不利。因此，在大多数催化体系中，从不饱和醛得到不饱和醇是非常困难的。在这项工作中，ZnAl-水滑石负载的半胱氨酸封端的Au25纳米团簇被用作肉桂醛化学选择性氢化成肉桂醇的预催化剂。该催化剂在延长反应时间和底物完全转化的情况下表现出稳定的高选择性（~95%）。根据对照实验结果，