海南大学南海海洋资源利用国家重点实验室陈琦研究员致力于以共价有机框架(COFs)为主的多孔界面海洋材料的研究，结合海南独特的地理位置和丰富的海洋资源，推动COFs材料在海洋环境修复和海洋资源利用等方面的应用。近一年课题组通过Povarov环化反应对基体COFs材料进行了后功能化修饰，分别引入了不同官能团如硝基、氨基、双三氟甲基、硼酸和炔基等，通过基团与小分子或离子的特异相互作用选择性吸附海水中潜在有机污染物（消炎药、含氟农药等）、邻双酚类物质及放射性核废料碘。同时，发现了一种含烯丙基醚的酰腙类荧光COFs对海水中重金属离子Pd²⁺具有优异的特异性识别和选择性吸附作用。通过在滤纸上原位生长该材料制备出了荧光试纸，在可见光和365 nm紫外灯下10秒内实现对水中重金属Pd²⁺进行可视化检测。此外，还设计制备了一种含胍基的离子型COFs材料，该材料具备良好的抗菌能力，对海水中碳酸铀酰离子表现出良好的选择性吸附性能，相关研究工作得到了王宁教授和袁益辉研究员的帮助和支持。上述研究结果分别发表于国际知名(JCR Q1)期刊Chem. Eng. J. ^[1], J. Mater. Chem. A ^[2] , ACS Appl. Mater. Interfaces^[3] , Nanoscale^[4] , Adv. Compos. Hybrid Mater.^[5]及Micropor. Mesopor. Mater. ^[6], 由博士研究生梁颖、硕士研究生赵宇翔、鲁岩、常兆森、王顺利、刘鑫等分别主要完成。

        Research Professor Chen Qi of the MRU is dedicated to the research of porous interfacial marine materials based on covalent organic frameworks (COFs), and his research makes the best use of Hainan’s unique geographical location and rich marine resources, promoting the application of COFs materials in marine environmental restoration and marine resources utilization. Over the past year, the research group has post-functionalized the matrix COFs materials through Povarov cyclization reaction and introduced different functional groups such as nitro, amino, bis(trifluoromethyl), boronic acid and alkynyl groups and so on which selectively adsorb potential organic pollutants (anti-inflammatory drugs, fluorinated pesticides, etc.), bisphenols and radioactive iodides from nuclear waste in seawater through specific interactions of the groups with small molecules or ions. Meanwhile, allyl functionalized hydrazone 2D COFs (XB-COFs) are found for selective fluorescent detection and adsorption of Pd2+ (detection concentration of 0.29 μM) in water. A fluorescent test paper is prepared by the in situ growth of XB-COF onto a filter paper, which can realize visualization detection of Pd2+ in 10s with the naked eye or under a 365nm UV lamp. In addition, an ionic COFs material containing guanidine group is designed, which has good antibacterial ability and shows good selective adsorption performance for uranyl carbonate ions in seawater. The related research work has been assisted and supported by Professor Wang Ning and Research Professor Yuan Yihui. And the above research results have been published in the internationally recognized (JCR Q1) journals which are Chem. Eng. J., J. Mater. Chem. A, ACS Appl. Mater. Interfaces, Nanoscale, Adv. Compos. Hybrid Mater. and Micropor. Mesopor. Mater. respectively, and the main contributors are Ying Liang, a Ph.D. student, and five postgraduate students who are Zhao Yuxiang, Lu Yan, Chang Zhaoshen, Wang Shunli, and Liu Xin respectively.

以上研究工作获得了国家自然科学基金面上和地区项目、海南省重点研发计划、海南大学高层次人才启动基金等项目的支持。

        The above research has been supported by the National Natural Science Foundation of China, Hainan Science and Technology Major Project, and Foundation for High-Level Talents,Hainan University.

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Link to full texts:

[1]  https://www.sciencedirect.com/science/article/pii/S138589472033223X?via%3Dihub

[2]  https://pubs.rsc.org/en/content/articlelanding/2020/TA/D0TA07708A

[3] https://pubs.acs.org/doi/10.1021/acsami.0c20203?ref=pdf

[4]  https://pubs.rsc.org/en/content/articlelanding/2020/NR/D0NR06110G

[5]  https://link.springer.com/article/10.1007%2Fs42114-021-00311-3

[6] https://www.sciencedirect.com/science/article/pii/S1387181121001724?via%3Dihub