Preparation of Freestanding Conjugated Microporous Polymer Nanomembranes for Gas Separation
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- 作者：Peter Lindemann ; Manuel Tsotsalas ; Sergey Shishatskiy ; Volker Abetz ; Peter Krolla-Sidenstein ; Carlos Azucena ; Laure Monnereau ; Andr茅 Beyer ; Armin G枚lzh盲user ; Veronica Mugnaini ; Hartmut Gliemann ; Stefan Br盲se ; Christof W枚ll
- 刊名：Chemistry of Materials
- 出版年：2014
- 出版时间：December 23, 2014
- 年：2014
- 卷：26
- 期：24
- 页码：7189-7193
- 全文大小：324K
- ISSN：1520-5002
文摘
Conjugated microporous polymers (CMPs) have attracted much interest due to their intrinsic porosity, outstanding stability, and high variability. However, the processing of these materials for membrane application has been limited due to their insoluble nature when synthesized as bulk material. Here we report the synthesis of freestanding CMP-nanomembranes via layer-by-layer growth of a 鈥渃lick鈥?based conjugated microporous polymer on a sacrificial substrate. After dissolution of the substrate the CMP-nanomembrane can be transferred to porous substrates and continuously cover holes of up to 50 渭m diameter. The CMP-nanomembranes appear defect-free as inferred from high selectivity values obtained from gas permeation experiments and from electrochemical investigation in the presence of ferrocene. The presented synthesis method represents a versatile strategy to incorporate CMP materials in functional devices for membrane separation, catalysis, or organic electronics.