北京化工大学刘惠玉团队揭示了MOFs蛋黄壳纳米结构的溶剂依赖吸附驱动机制。相关研究成果于2021年1月06日发表在国际知名学术期刊《德国应用化学》。

基于金属有机骨架（MOFs）的蛋黄壳纳米结构由于其多功能性，近年来引起了广泛的关注。然而，蛋黄壳纳米结构的形成机制尚不清楚，对其大小和形态的调控仍然受到限制。

该文中，研究人员首先提出了一种溶剂依赖吸附驱动机制，用于合成蛋黄壳型MOFs基纳米结构，其表面包覆尺寸和形态可调的有介孔SiO2壳（ZIF-8@mSiO2)。甲醇（CH3OH）和水（H2O）在ZIF-8核上的选择性和竞争性吸附对诱导蛋黄壳纳米结构的形态演化具有决定性的作用。获得的蛋黄壳ZIF-8@mSiO2级纳米结构在体外产生声空化效应用于肿瘤的声动力治疗方面具有广阔的应用前景。

这项工作不仅有助于设计新颖的MOFs基蛋黄壳纳米结构，而且有助于MOFs材料的广泛应用。

附：英文原文

Title: Solvent‐Dependent Adsorption‐Driven Mechanism for MOFs‐Based Yolk‐Shell Nanostructures

Author: Weiwei Wang, Bolong Xu, Xueting Pan, Junfeng Zhang, Huiyu Liu

Issue&Volume: 06 January 2021

Abstract: Metal–organic frameworks (MOFs)‐based yolk‐shell nanostructures have drawn enormous attention recently due to their multifunctionality. However, the regulations of the size and morphology of yolk‐shell nanostructures are still limited by the unclear formation mechanism. Herein, we first demonstrated a solvent‐dependent adsorption‐driven mechanism for synthesizing yolk‐shelled MOFs‐based nanostructures coated with mesoporous SiO2  shells (ZIF‐8@mSiO2  ) with tunable size and morphology. The selective and competitive adsorption of methanol (CH3OH) and water (H2O) on ZIF‐8 core were found to have decisive effects on inducing the morphology evolution of yolk‐shell nanostructures. The obtained yolk‐shelled ZIF‐8@mSiO2  nanostructures show great promise in generating acoustic cavitation effect for sonodynamic cancer therapy  in vitro  . We believe that this work will not only help us to design novel MOFs‐based yolk‐shell nanostructures, but also promote the widespread application of MOFs materials.

DOI: 10.1002/anie.202014895

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202014895