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. סינתזה של CMP Thin Films באמצעות תוספת Sequential <ol style=";text-align:right;direction:rtl"><li style=";text-align:right;direction:rtl"> functionalization monolayer התאסף עצמי (SAM) של זהב ביציץ. <ol style=";text-align:right;direction:rtl"><li style=";text-align:right;direction:rtl"> הכן 1 פתרון מ&quot;מ של אמיד חומצה-propargyl 11-thioacetyl-undecane 14 בא...

<ol>
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A., W&#246;ll, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=MOF+thin+films:+existing+and+future+applications.">MOF thin films: existing and future applications.</a> Chemical Society Reviews. 40 (2), 1081-1106 (2011).</li><li>Liu, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Deposition+of+Metal-Organic+Frameworks+by+Liquid-Phase+Epitaxy:+The+Influence+of+Substrate+Functional+Group+Density+on+Film+Orientation.">Deposition of Metal-Organic Frameworks by Liquid-Phase Epitaxy: The Influence of Substrate Functional Group Density on Film Orientation.</a> Materials. 5 (9), 1581-1592 (2012).</li><li>Such, G. K., Quinn, J. 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לסינתזה של CMP-סרט הפתרון של הזרז צריך להיות טרי. זרז שבור (כלומר, חמצון) הוא הצביע על ידי צבע כחול של הפתרון. הפתרון הטרי הוא חסר צבע. נקודה מכרעת היא לחתוך את הקצוות של המצע נציץ לאחר ציפוי ספין PMMA. גם פגמים במצע יש לחתוך, כלומ?...

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

חומרי שטח פנים גדולים כCMP משכו התעניינות גוברת לאחרונה, בשל השונות שלהם גבוהות בשילוב של קבוצות פונקציונליות בשילוב עם יציבות התרמית וכימית המעולה שלהם, וצפיפות נמוכה. עם זאת, הטבע המסיס גורם לבעיות בעיבוד שלהם מאז טכניקות מיושמות בדרך כלל כגון ציפוי ספין אינן זמינות. במיוחד עבור יישומי קרום, שבו העיבוד של CMP כסרטים דקים רצוי, בעיות העיבוד מנעו היישום המסחרי שלהם. כאן אנו מתארים את סינתזת interfacial של סרטים דקים CMP על מצעים פונקציונליות באמצעות סינתזה מולקולרית שכבה אחר שכבה (LBL). תהליך זה מאפשר ההכנה של סרטים עם עובי רצוי והרכב והדרגות הרכב אפילו רצויים. השימוש בתומך ההקרבה מאפשר ההכנה של ממברנות בודדים על ידי פירוקה של התמיכה לאחרהסינתזה. כדי לטפל בקרומים בודד דקים כגון ההגנה עם ציפוי ההקרבה הראתה הבטחה גדולה, כדי למנוע קרע של nanomembranes. כדי להעביר את nanomembranes למצע הרצוי, הקרומים המצופים upfloated בממשק האוויר הנוזלי ולאחר מכן הועברו באמצעות ציפוי לטבול.

הקרומים מתאפיינים בספקטרוסקופיה קליטת השתקפות אינפרא אדום (IRRAS). 16 איור 4 מראה IRRA-ספקטרום מCMP-קרום הועבר לרקיק זהב. להקות טיפוסיות מהתנודות של עמוד השדרה וריח הן ב1,605 סנטימטר -1, 1,515 סנטימטר -1 סנטימטר ו1,412 -1. ניתן לצפות קבוצות alkyne ויזידו unr...

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.

סינתזה והעברה של אוב Nanomembranes פולימר Microporous Conjugated שכבה אחר שכבה

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

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