【摘 要】
：
Although the selective hydrogenation of α,β-unsaturated aldehyde to unsaturated alcohol (UOL) is an extremely important transformation,it is still a great challenge to achieve high selectivity to UOL due to thermodynamic favoring of the C=C hydrogenation
【机 构】
：
MOE Laboratory of Bioinorganic and Synthetic Chemistry,Lehn Institute of Functional Materials,School
论文部分内容阅读
Although the selective hydrogenation of α,β-unsaturated aldehyde to unsaturated alcohol (UOL) is an extremely important transformation,it is still a great challenge to achieve high selectivity to UOL due to thermodynamic favoring of the C=C hydrogenation over the C=O hydrogenation.Herein,we report that iridium nanoclusters (Ir NCs) confined within hollow MIL-101(Fe) expresses satisfied reaction ac-tivity (93.9％) and high selectivity (96.2％) for the hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) under 1 bar H2 atmosphere and room temperature.The unique hollow structure of MIL-101(Fe) benefits for the fast transport of reactant,ensuring the comparable reaction activity and better recyclability of Ir@MIL-101(Fe) than the counterparts which Ir NCs were on the surface of MIL-101(Fe).Furthermore,The X-ray photoelectron spectroscopy data indicates the electropositive Ir NCs,owing to the electron transfer from Ir to MIL-101(Fe),can interact with oxygen lone pairs,and Fourier transform in-frared spectrum shows the Lewis acid sites in MIL-101(Fe) can strongly interact with C=O bond,which contributes to a high selectivity for COL.This work suggests the considerable potential of synergetic effect between hollow MOFs and metal nanoclusters for selective hydrogenation reactions.
其他文献
The rational design of nanozymes with superior activities is essential for improving bioassay perfor-mances.Herein,nitrogen and boron co-doped graphene nanoribbons (NB-GNRs) are prepared by a hy-drothermal method using urea as the nitrogen source and bori
在《政府会计制度》改革的背景下,事业单位改革也在不断深入,在这种背景下,要想促进事业单位的稳定发展,应加强对财务会计工作的认识,强化其与预算管理工作的整合,为后续工作的顺利开展奠定基础.在实践工作开展阶段,需要对二者整合要点有着透彻掌握,并了解所面临的问题,以此提高财务信息可靠性.基于此,本文简要概述事业单位财务会计与预算管理整合的必要性,并围绕现阶段整合中存在的问题提出相关建议.
随着我国经济发展速度的加快,人民生活在一定程度上得到了满足,各企业都得到了快速发展,在这样的背景下,我国的财经会计也在原有基础上有了一定的发展空间.本文对财经会计新思维展开了一系列的探讨和分析,从而推进其进一步发展.
Vitamin B12 (macrocyclic cobalamin) has been recently reported to be capable of electrochemically cat-alyzing water oxidation in a neutral phosphate buffer solution.In this work,density functional calcula-tions were employed to elucidate the water oxidati
Surface oxygen vacancy defects of mesoporous CeO2 nanosheets assembled microspheres (D-CeO2) are engineered by polymer precipitation,hydrothermal and surface hydrogenation strategies.The resultant D-CeO2 with a main pore diameter of 9.3 nm has a large spe
The selective hydrogenation of C≡C to C=C bonds is an important step,yet remains to be a great chal-lenge in chemical industry.In this study,we have revealed the influence of Pd deposition pH value on the catalytic performance of Pd-CuO/SiO2 catalyst for
Based on the host-guest molecular recognition capability of cucurbit[6]uril (CB[6]) modified on the gold surface,sensitive spectrophotometric and electrochemical methods for the detection of metformin(MET) have been developed.The molecular recognition bet
Herein,the nanoscaled ATP-responsive upconversion metal-organic frameworks (UCMOFs) are aqueous-phase synthesized for co-delivery of therapeutic protein cytochrome c (Cyt c) and chemodrugs doxoru-bicin (DOX),achieving targeted combinational therapy of hum
A new metal-oxo-clusters-based inorganic framework[NaCo2Mo2O7(OH)3]n (NaCoMo),named as 3D platelike ternary-oxo-cluster,has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction structure analysis,FT-IR spectroscopy,powder
新会计准则在计量公允价值上发生较大变化,影响到会计核算工作的开展.基于此,本文首先分析了新会计准则对于会计核算的影响,其次分析了会计核算面临的难题,最后提出了完善会计核算的建议,需要企业多个部门进行协调,充分发挥出会计核算的价值.