Name: layer-by-layer synthesis and transfer of freestanding conjugated microporous polymer nanomembranes
Uploaded: 2015-12-15T13:00:00
Description: Watch this Scientific Journal Video about Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes at JoVE.com

The authors have no acknowledgements.

1.合成的CMP薄膜通过顺序加入<ol><li>金云母自组装单层（SAM）官能化。 <ol><li>制备11-硫代乙酰基十一烷酸炔丙基酰胺14在乙醇1mM的溶液（SAM-溶液）。混合使用超声波浴，直到解决方案是明确的。用铝箔避光的瓶子。 </li><li>获取在氩气中金云母片。从储存容器撤走后直接浸入云母晶片18小时在SAM的溶液。 </li><li>取所制备的Au-云母晶片出SAM-溶液，冲洗，在氮气流下乙醇和干燥。之后存?...

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对于在CMP-膜的合成催化剂的溶液必须是新鲜。破碎的催化剂（即，氧化的）由溶液的蓝色着色指示。新鲜的溶液是无色的。 一个关键点是旋涂PMMA后裁切云母基材的边缘。另外在基板的缺陷应该削减， 即，每个点是聚甲基丙烯酸甲酯可以来缺失金层，因为在与云母基板接触。否则金层不能从云母基板容易剥离。另外关于金层的云母基材支队，支队开始在?...

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.

<table>
	<tbody>
		<tr>
			<td>Acetone</td>
			<td>VWR BDH Prolabo</td>
			<td>20066.330</td>
			<td>AnalR NORMAPUR</td>
		</tr>
		<tr>
			<td>Potassium iodide</td>
			<td>VWR BDH Prolabo</td>
			<td>26846.292</td>
			<td>AnalR NORMAPUR</td>
		</tr>
		<tr>
			<td>Ethyl acetate</td>
			<td>VWR BDH Prolabo</td>
			<td>23882.321</td>
			<td>AnalR NORMAPUR</td>
		</tr>
		<tr>
			<td>Tetrahydrofurane (THF)</td>
			<td>VWR BDH Prolabo</td>
			<td>28559.320</td>
			<td>HiPerSolv CHROMANORM</td>
		</tr>
		<tr>
			<td>THF waterfree</td>
			<td>Merck Millipore</td>
			<td>1.08107.1001</td>
			<td>SeccoSolv</td>
		</tr>
		<tr>
			<td>Iodine</td>
			<td>Sigma-Aldrich</td>
			<td>20,777-2</td>
			<td></td>
		</tr>
		<tr>
			<td>Tetrakis(acetonitrile)copper(I)hexafluoro-phosphate</td>
			<td>Sigma-Aldrich</td>
			<td>346276-5G</td>
			<td></td>
		</tr>
		<tr>
			<td>Poly(methyl methacrylate) 996 kDa (PMMA)</td>
			<td>Sigma-Aldrich</td>
			<td>182265-25G</td>
			<td></td>
		</tr>
		<tr>
			<td>1.1.1.1 Methanetetrayltetrakis(4-azidobenzene) (TPM-azide)</td>
			<td></td>
			<td></td>
			<td>provided by AK Prof. Br&#228;se. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to9</td>
		</tr>
		<tr>
			<td>1.1.1.1 Methanetetrayltetrakis(4-ethinylenebenzene) (TPM-alkyne)</td>
			<td></td>
			<td></td>
			<td>provided by AK Prof. Br&#228;se. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to9</td>
		</tr>
		<tr>
			<td>11-thioacetyl-undecaneacid propargylamide</td>
			<td></td>
			<td></td>
			<td>provided by AK Prof. Br&#228;se. Institute of organic chemistry, Karlsruhe Institute of Technology. Synthesized according to8</td>
		</tr>
		<tr>
			<td>gold/titan coated silicium-wafer</td>
			<td>Georg Albert PVD, 76857 Silz, Germany</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>gold coated mica</td>
			<td>Georg Albert PVD, 76857 Silz, Germany</td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

layer-by-layer synthesis and transfer of freestanding conjugated microporous polymer nanomembranes

CMP作为大表面积材料已经引起了近来越来越大的兴趣，由于它们的高变异性的官能团的组合掺入其优异的热和化学稳定性，和低的密度。然而，它们的不溶性质会产生问题在它们的处理，因为，如旋涂通常适用技术是不可用的。特别是对于膜应用，其中CMP为薄膜的处理是可取的，则处理问题阻碍他们的商业应用。 这里，我们描述在通过分子层 - 层（LBL）合成官能化基底的CMP薄膜的界面合成。此过程允许具有所需厚度和组成，甚至所需组成梯度的薄膜的制备。 使用牺牲载体允许通过后溶解载体的独立式膜的制备的合成。为了处理这种超薄独立的膜与牺牲涂料的保护表现出极大的承诺，避免了纳米薄膜破裂。到的纳米薄膜转移到期望的基材，所述涂覆的膜upfloated在空气 - 液体界面，然后通过浸涂传送。

膜的特征在于红外反射吸收光谱（IRRAS）。16 图4示出 IRRA谱从在CMP膜转移至金晶片。由芳族骨架的振动典型峰是一千六百○五-1，一千五百十五-1和1412厘米-1。未反应的炔和叠氮基团可通过特征频带在2125厘米-1和一二二七-1可以观察到。 图5显示的扫描电子显微镜（SEM）图像。的独立式膜是清晰可见。 <p class="jove_content" fo:...

Watch this Scientific Journal Video about Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes at JoVE.com

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

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.

层 - 层的合成和独立式共轭微孔聚合物纳米薄膜的转移

CMP as large surface area materials have attracted growing interest recently, due to their high variability in the incorporation of functional groups in ...

Research

JoVE Journal

Chemistry

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

密闭静态和流动胶体聚合物混合物的共聚焦成像

The behavior of confined colloidal suspensions with attractive interparticle interactions is critical to the rational design of materials for directed ...

科研

化学

Fabrication of Large-area Free-standing Ultrathin Polymer Films

大面积的制造自立性的超薄聚合物薄膜

This procedure describes a method for the fabrication of large-area and ultrathin free-standing polymer films.  Typically, ultrathin films are prepared ...

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

对磷酸增强富集制备高度多孔配位聚合物涂层的孔聚合物石柱的

We describe a protocol for the preparation of hybrid materials based on highly porous coordination polymer coatings on the internal surface of macroporous ...

Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers

光动力疗法与混合导电高分子/富勒烯纳米颗粒光敏剂

In this article a method for the fabrication and reproducible in-vitro evaluation of conducting polymer nanoparticles blended with fullerene as the next ...

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超分子胶体的合成与表征

Control over colloidal assembly is of utmost importance for the development of functional colloidal materials with tailored structural and mechanical ...

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A method for using Diels Alder thermo-reversible chemistry as cross-linking tool for rubber products is demonstrated. In this work, a commercial ...

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利用中子散射监测光照对共轭高分子凝胶结构的影响

We demonstrate a protocol to effectively monitor the gelation process of a high concentration solution of conjugated polymer both in the presence and ...

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The protocol demonstrates a method for mimicking the spinning process of silkworm. In the native spinning process, the contracting spinning duct enables ...

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利用 iccd 摄像机对无氧环境下的三重收集有机化合物进行光物理表征

Here, we present a sensible method of the acquisition and analysis of time-resolved photoluminescence using an ultrafast iCCD camera. This system enables ...

Raman and IR Spectroelectrochemical Methods as Tools to Analyze Conjugated Organic Compounds

拉曼光谱和红外光谱电化学法作为分析共轭有机化合物的工具

In the presented work, two spectroelectrochemical techniques are discussed as tools for the analysis of the structural changes occurring in the molecule ...