基于分子间相互作用的木质素裂解醛类产物选择性控制

木质素是重要的可再生资源之一，利用催化技术将木质素高选择性转化为含氧化学品，是催化科学和技术的前沿领域之一，也是造纸制浆等木质纤维素利用行业中的迫切需求。本项目拟开展木质素催化选择裂解制备芳香醛类的研究。木质素的结构组成复杂，氧化裂解转化的产物种类多样，而醛类分子在氧化条件下较为活泼的性质，使得氧化裂解过程高选择性停留在醛类中间产物极具挑战性。本项目拟利用分子之间的氢键等相互作用，借助于变温核磁等技术手段，探索不同分子对于芳香醛类的稳定性和调控规律。通过对多孔有机聚合物表面进行助剂分子修饰，精确调控催化剂表面修饰分子与产物、原料分子之间的相互作用，最终实现提高芳香醛产物选择性的目的。为木质素的深加工利用提供一条高附加值路线，阐明醛类产物的控制作用机制，具有重要的科学意义。初步研究结果证明了该项目的可行性。

Lignin is one of the most important renewable resources，it is not only one of the leading research area in the catalytic field but also one of the high demand in the paper industry for the converting of lignin into oxygen containing molecules with advanced catalytic technology. In this item, we aimed at developing catalytic method for converting lignin into aromatic aldehydes. To achieve the purpose of obtaining high selectivity of aromatic aldehydes, the strategy of molecule interaction between carbonyl group and the assisting molecule is involved. With the muti-method including temperature dependent NMR, the research will focus on the relationship of stability and rules among different assisting molecules. Based on the rules obtained, the novel porous organic polymer catalyst modified with the assistant molecule will be designed and synthesized. With this special designed catalyst, it will apply in the depolymerization of lignin, structure function relationship in the aromatic aldehyde formation will be researched. This research will provide a new line for the valorization of lignin meanwhile get insight into the mechanism. Preliminary results suggested that it is a feasible proposal.