層ごとの合成と自立共役高分子ナノ薄膜マイクロポーラスの譲渡
Summary
In this paper we describe the interfacial synthesis of conjugated microporous polymers (CMP) on sacrificial substrates, and the dissolution of the substrate for the preparation of freestanding CMP nanomembranes. In addition, we will describe how the fragile nanomembranes can be transferred to other substrates.
Abstract
CMPのような大きな表面積材料は、それらのその優れた熱的および化学的安定性と組み合わせた官能基を組み込むことで高い可変性、及び低濃度に、最近関心を集めています。例えば、スピンコーティングなどの通常適用技術が利用できないので、それらの不溶性の性質は、それらの処理に問題を引き起こします。特にCMP薄膜としての処理が望まれる膜の用途のために、処理上の問題は、それらの商業的用途を妨げてきました。
ここでは、分子層ごと（LBL）合成により官能化基材上に、CMP薄膜の界面合成が記載されています。このプロセスは、所望の厚さおよび組成、さらには所望の組成勾配を有するフィルムの製造を可能にします。
犠牲支持体の使用は、後に、支持体の溶解によって自立膜の製造を可能にします合成。このような超薄型自立膜を処理するには、犠牲コーティングと保護は、ナノ薄膜の破裂を避けるために、大きな期待を示しました。所望の基板にナノ薄膜を転送するには、コーティングされた膜は、気液界面でのupfloatedした後、ディップコーティングを介して転送されます。
Introduction
The preparation of ultra-thin polymer membranes is of high interest for applications in gas separation and nanofiltration. Challenges in the synthesis are represented by (a) the control of the membrane thickness and the homogeneity and (b) transfer of such fragile membranes. To overcome challenge (a), molecular layer-by-layer synthesis1 has shown great promise in controlling the thickness and homogeneity of thin films grown at the solid-liquid interface.2,3 Controlling the number of layers linearly controls the film thickness. The l-b-l method has been successfully used to fabricate surface mounted metal organic frameworks (SURMOFs),4-7 also the synthesis of thin polymer films via l-b-l reaction of polymer chains was demonstrated.8 The challenge (b) concerns the handling of these ultra-thin membranes. To avoid rupture or wrinkling of the nanomembranes sacrificial supports of coatings have shown great promise. 9
Here we will present a detailed protocol for synthesis of conjugated microporous polymer (CMP)10-13 thin films through sequential addition of the molecular building blocks, with desired thickness and composition. The preparation of free-standing CMP nanomembranes is achieved by using a sacrificial support. To handle and transfer the CMP nanomembranes to other supports we will describe a simple protocol to protect the membranes with sacrificial coatings and their upfloating to the liquid air interface and subsequent transfer using dip-coating.
Protocol
Representative Results
Discussion
CMP-フィルムの合成用触媒の溶液を新鮮にする必要があります。壊れた触媒（ すなわち、酸化された）を、溶液の青色着色によって示されます。新鮮な溶液は無色です。
重要な点は、スピンコートPMMA後マイカ基板の端部を切断することです。また、基板の欠陥をカットする必要があり、 すなわち、各スポットは、PMMAが見つからないため、金層の、マイカ?…
Disclosures
The authors have nothing to disclose.
Acknowledgements
The authors have no acknowledgements.
Materials
| Acetone | VWR BDH Prolabo | 20066.330 | AnalR NORMAPUR |
| Potassium iodide | VWR BDH Prolabo | 26846.292 | AnalR NORMAPUR |
| Ethyl acetate | VWR BDH Prolabo | 23882.321 | AnalR NORMAPUR |
| Tetrahydrofurane (THF) | VWR BDH Prolabo | 28559.320 | HiPerSolv CHROMANORM |
| THF waterfree | Merck Millipore | 1.08107.1001 | SeccoSolv |
| Iodine | Sigma-Aldrich | 20,777-2 | |
| Tetrakis(acetonitrile)copper(I)hexafluoro-phosphate | Sigma-Aldrich | 346276-5G | |
| Poly(methyl methacrylate) 996 kDa (PMMA) | Sigma-Aldrich | 182265-25G | |
| 1.1.1.1 Methanetetrayltetrakis(4-azidobenzene) (TPM-azide) | provided by AK Prof. Bräse. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to9 | ||
| 1.1.1.1 Methanetetrayltetrakis(4-ethinylenebenzene) (TPM-alkyne) | provided by AK Prof. Bräse. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to9 | ||
| 11-thioacetyl-undecaneacid propargylamide | provided by AK Prof. Bräse. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to8 | ||
| gold/titan coated silicium-wafer | Georg Albert PVD, 76857 Silz, Germany | ||
| gold coated mica | Georg Albert PVD, 76857 Silz, Germany |
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