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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la200604w
|2 doi
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|a pubmed24n0692.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Kucuk, Asuman C
|e verfasserin
|4 aut
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|a Effects of hydrogen bonding on the monolayer properties of amphiphilic double-decker-shaped polyhedral silsesquioxanes
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 30.08.2011
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a ErratumIn: Langmuir. 2011 Jul 19;27(14):9068
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|a Citation Status MEDLINE
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|a "Core-corona" type amphiphiles, which comprise double-decker-shaped POSSs (DDSQs) as the core and two or four di(ethylene glycol) (DEG) units as the coronae, have recently been reported to form a stable monolayer at the air-water interface. In this paper, another core-corona amphiphile, 2DEGNH-DDSQ, which has a urethane group at the end of the coronae, was synthesized to elucidate the effects of hydrogen bonding on monolayer properties. The surface pressure-area isotherm and Brewster angle microscopy revealed that 2DEGNH-DDSQ initially formed rodlike assemblies. They subsequently coalescence to form a uniform monolayer with compression. Actually, 2DEGNH-DDSQs are well ordered in the rodlike assembly because of the strong hydrogen bonds among the urethane groups, as confirmed by FT-IR spectra. Although the monolayer was not transferred onto a solid substrate, mixing of 2DEGNH-DDSQ with 2DEG-DDSQ, which has already been reported to form a liquidlike monolayer, overcame this problem. The 1:1 molar mixture of 2DEGNH-DDSQ and 2DEG-DDSQ forms a uniform liquidlike monolayer. The mixed monolayer was transferred onto a solid substrate as a Z-type Langmuir-Blodgett film. Atomic force microscopic (AFM) images of the mixed-bilayer film showed a uniform surface with root-mean-square surface roughness of 0.21 nm. The intermolecular hydrogen bonds between the urethane groups in 2DEGNH-DDSQ and the hydroxyl groups in 2DEG-DDSQ improve the monolayer properties, which enable successful transfer of the LB film
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Ethylene Glycols
|2 NLM
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|a Organosilicon Compounds
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|a Polymers
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|a Water
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|a 059QF0KO0R
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|a diethylene glycol
|2 NLM
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|a 61BR964293
|2 NLM
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|a Matsui, Jun
|e verfasserin
|4 aut
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|a Miyashita, Tokuji
|e verfasserin
|4 aut
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 27(2011), 10 vom: 17. Mai, Seite 6381-8
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|x 1520-5827
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|g volume:27
|g year:2011
|g number:10
|g day:17
|g month:05
|g pages:6381-8
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|u http://dx.doi.org/10.1021/la200604w
|3 Volltext
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