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用于CO转化和抗菌的多功能离子多孔框架材料

Multifunctional ionic porous frameworks for CO conversion and combating microbes.

作者信息

Hussain Md Waseem, Bhardwaj Vipin, Giri Arkaprabha, Chande Ajit, Patra Abhijit

机构信息

Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462066 Madhya Pradesh India

Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road, Bhauri Bhopal 462066 Madhya Pradesh India

出版信息

Chem Sci. 2020 Jul 6;11(30):7910-7920. doi: 10.1039/d0sc01658f.

Abstract

Porous organic frameworks (POFs) with a heteroatom rich ionic backbone have emerged as advanced materials for catalysis, molecular separation, and antimicrobial applications. The loading of metal ions further enhances Lewis acidity, augmenting the activity associated with such frameworks. Metal-loaded ionic POFs, however, often suffer from physicochemical instability, thereby limiting their scope for diverse applications. Herein, we report the fabrication of triaminoguanidinium-based ionic POFs through Schiff base condensation in a cost-effective and scalable manner. The resultant N-rich ionic frameworks facilitate selective CO uptake and afford high metal (Zn(ii): 47.2%) loading capacity. Owing to the ionic guanidinium core and ZnO infused mesoporous frameworks, Zn/POFs showed pronounced catalytic activity in the cycloaddition of CO and epoxides into cyclic organic carbonates under solvent-free conditions with high catalyst recyclability. The synergistic effect of infused ZnO and cationic triaminoguanidinium frameworks in Zn/POFs led to robust antibacterial (Gram-positive, and Gram-negative, ) and antiviral activity targeting HIV-1 and VSV-G enveloped lentiviral particles. We thus present triaminoguanidinium-based POFs and Zn/POFs as a new class of multifunctional materials for environmental remediation and biomedical applications.

摘要

具有富含杂原子离子主链的多孔有机框架(POFs)已成为用于催化、分子分离和抗菌应用的先进材料。金属离子的负载进一步增强了路易斯酸度,提高了与此类框架相关的活性。然而,负载金属的离子型POFs通常存在物理化学不稳定性,从而限制了它们在各种应用中的范围。在此,我们报告了通过席夫碱缩合以经济高效且可扩展的方式制备基于三氨基胍鎓的离子型POFs。所得的富含氮的离子框架有助于选择性地吸收CO,并具有高金属(Zn(ii):47.2%)负载能力。由于离子型胍鎓核心和注入ZnO的介孔框架,Zn/POFs在无溶剂条件下将CO和环氧化物环加成生成环状有机碳酸酯的反应中表现出显著的催化活性,且催化剂具有高可回收性。注入的ZnO和阳离子三氨基胍鎓框架在Zn/POFs中的协同作用导致了针对革兰氏阳性菌和革兰氏阴性菌以及针对HIV-1和VSV-G包膜慢病毒颗粒的强大抗菌和抗病毒活性。因此,我们提出基于三氨基胍鎓的POFs和Zn/POFs作为一类用于环境修复和生物医学应用的新型多功能材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/092b/8163429/3a604279f83f/d0sc01658f-f1.jpg

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