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Formation and Antibacterial Performance of Metal–Organic Framework Films via Dopamine-Mediated Fast Assembly under Visible Light
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2020-09-16 , DOI: 10.1021/acssuschemeng.0c03384
Lingwan Hao 1 , Rujian Jiang 1 , Yong Fan 2 , Jia-ning Xu 2 , Limei Tian 1 , Jie Zhao 1 , Weihua Ming 3 , Luquan Ren 1
Affiliation  

Metal–organic frameworks (MOFs) have recently attracted intensive interest toward a variety of potential applications due to their very high porosity. However, the preparation of MOF films is tedious and involves complicated procedures. Herein, we report a simple and widely applicable strategy to fabricate uniform MOF layers on desired substrates via dopamine (DA) codeposition from neutral (pH = 7) aqueous MOF particle dispersions mediated by visible light (vis). Uniquely, DA and MOF at pH 7 under vis illumination created a synergistic condition, leading to the formation of a uniform and stable MOF layer, which otherwise appeared to be difficult to obtain. The zirconium-based MOF particle, UiO-66, played an important role in helping generate a suitable amount of reactive oxygen species under vis to promote DA polymerization, which in turn significantly facilitated the MOF film formation. By introducing rose bengal into the MOF film, excellent photodynamic antibacterial activities against Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli were achieved. Overall, this study provides a straightforward strategy in preparing MOF thin films on desired substrates, which may help expand the application of functionalized MOFs.

中文翻译:

形成与金属有机骨架膜的抗菌性能通过多巴胺介导的快速装配在可见光

金属有机框架(MOF)由于具有很高的孔隙率,最近引起了人们对各种潜在应用的浓厚兴趣。然而,MOF膜的制备是繁琐的并且涉及复杂的过程。本文中,我们报告了一种简单且广泛适用的策略,可通过以下方法在所需基板制造均匀的MOF层多巴胺(DA)从可见光(vis)介导的中性(pH = 7)MOF水性颗粒分散液中共沉积。独特的是,DA和MOF在可见光下pH为7时产生了协同作用,导致形成了均匀稳定的MOF层,否则很难获得。锆基MOF颗粒UiO-66在帮助下在可见光下产生适量的活性氧以促进DA聚合起着重要作用,从而大大促进了MOF膜的形成。通过将玫瑰孟加拉引入MOF膜,对革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌具有出色的光动力学抗菌活性实现了。总体而言,这项研究提供了在所需基材上制备MOF薄膜的直接策略,这可能有助于扩大功能化MOF的应用范围。
更新日期:2020-10-26
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