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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1021/la904228b
|2 doi
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|a pubmed24n0648.xml
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|a (DE-627)NLM194525708
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|a (NLM)20092347
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Yan, Dongpeng
|e verfasserin
|4 aut
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1 |
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|a Anionic poly(p-phenylenevinylene)/layered double hydroxide ordered ultrathin films with multiple quantum well structure
|b a combined experimental and theoretical study
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|c 2010
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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
|b cr
|2 rdacarrier
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|a Date Completed 17.08.2010
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a The sulfonated phenylenevinylene polyanion derivate (APPV) and exfoliated Mg-Al-layered double hydroxide (LDH) monolayers were alternatively assembled into ordered ultrathin films (UTFs) employing a layer-by-layer method, which shows uniform yellow luminescence. UV-vis absorption and fluorescence spectroscopy present a stepwise and regular growth of the UTFs upon increasing deposited cycles. X-ray diffraction, atomic force microscopy, and scanning electron microscopy demonstrate that the UTFs are orderly periodical layered structure with a thickness of 3.3-3.5 nm per bilayer. The APPV/LDH UTFs exhibit well-defined polarized photoemission characteristic with the maximum luminescence anisotropy of approximately 0.3. Moreover, the UTF exhibit longer fluorescence lifetime (3-3.85-fold) and higher photostability than the drop-casting APPV film under UV irradiation, suggesting that the existence of a LDH monolayer enhances the optical performance of the APPV polyanion. A combination study of electrochemistry and periodic density functional theory was used to investigate the electronic structure of the APPV/LDH system, illustrating that the APPV/LDH UTF is a kind of organic-inorganic hybrid multiple quantum well (MQW) structure with a low band energy of 1.7-1.8 eV, where the valence electrons of APPV can be confined into the energy wells formed by the LDH monolayers effectively. Therefore, this work not only gives a feasible method for fabricating a luminescence ultrathin film but also provides a detailed understanding of the geometric and electronic structures of photoactive polyanions confined between the LDH monolayers
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Anions
|2 NLM
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|a Drug Combinations
|2 NLM
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|a Membranes, Artificial
|2 NLM
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|a Polyvinyls
|2 NLM
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|a poly(4-phenylenevinylene)
|2 NLM
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|a aluminum hydroxide, magnesium hydroxide, drug combination
|2 NLM
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|a 37317-08-1
|2 NLM
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|a Aluminum Hydroxide
|2 NLM
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|a 5QB0T2IUN0
|2 NLM
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|a Magnesium Hydroxide
|2 NLM
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| 650 |
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|a NBZ3QY004S
|2 NLM
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| 700 |
1 |
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|a Lu, Jun
|e verfasserin
|4 aut
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1 |
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|a Ma, Jing
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wei, Min
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wang, Xinrui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Evans, David G
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Duan, Xue
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 26(2010), 10 vom: 18. Mai, Seite 7007-14
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:26
|g year:2010
|g number:10
|g day:18
|g month:05
|g pages:7007-14
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|u http://dx.doi.org/10.1021/la904228b
|3 Volltext
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