Zhou Meimei, Wu Yi-Nan, Wu Baozhen, Yin Xianpeng, Gao Ning, Li Fengting, Li Guangtao
College of Environmental Science & Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China), Fax: (+86) 21-659-850-59.
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, School of Environment Science and Engineering, Chang'an University, 710054, Xi'an, China.
Chem Asian J. 2017 Aug 17;12(16):2044-2047. doi: 10.1002/asia.201700307. Epub 2017 Jul 4.
The fabrication of patterned metal-organic framework (MOF) films with precisely controlled nanoscale resolution has been a fundamental challenge in nanoscience and nanotechnology. In this study, nanopatterned MOF films were fabricated using a layer-by-layer (LBL) growth method on functional templates (such as a bicontinuous nanoporous membrane or a structure with highly long-range-ordered nanoscopic channels parallel to the underlying substrate) generated by the microphase separation of polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) block copolymers. HKUST-1 can be directly deposited on the templates without any chemical modification because the pyridine groups in P2VP interact with metal ions via metal-BCP complexes. As a result, nanopatterned HKUST-1 films with feature sizes below 50 nm and controllable thicknesses can be fabricated by controlling the number of LBL growth cycles. The proposed fabrication method further extends the applications of MOFs in various fields.
制备具有精确可控纳米级分辨率的图案化金属有机框架（MOF）薄膜一直是纳米科学和纳米技术中的一项基本挑战。在本研究中，通过逐层（LBL）生长方法，在由聚苯乙烯 - b - 聚（2 - 乙烯基吡啶）（PS - b - P2VP）嵌段共聚物的微相分离产生的功能模板（如双连续纳米多孔膜或具有与底层基板平行的高度长程有序纳米通道的结构）上制备了纳米图案化的MOF薄膜。由于P2VP中的吡啶基团通过金属 - BCP配合物与金属离子相互作用，HKUST - 1可以直接沉积在模板上而无需任何化学修饰。结果，通过控制LBL生长循环的次数，可以制备出特征尺寸低于50 nm且厚度可控的纳米图案化HKUST - 1薄膜。所提出的制备方法进一步扩展了MOF在各个领域的应用。
