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Layer-by-layer assembly of a new l-glutamic acid based polymer with PAH: formation of hollow sphere during deposition, dye loading and chiroptical switch

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Soft Matter Vol - 7 Issue - 19

Soft Matter Vol - 7 Issue - 9

Soft Matter Vol - 7 Issue - 8

Soft Matter Vol - 7 Issue - 7

Soft Matter Vol - 7 Issue - 6

Soft Matter Vol - 7 Issue - 5

Soft Matter Vol - 7 Issue - 4

Soft Matter Vol - 7 Issue - 3

Layer-by-layer assembly of a new l-glutamic acid based polymer with PAH: formation of hollow sphere during deposition, dye loading and chiroptical switch

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhu, Xuewang Liu, Minghua
Copyright Year	2011
Abstract	A new polymer with acryl backbone and L-glutamic acid (PAGlu) as the side chain was synthesized and their assembly with cationic poly(allylamine hydrochloride) (PAH) through a layer-by-layer technique was investigated. Although PAGlu dissolved in water showed no particular organized structures, it formed hollow spheres when assembling with PAH. Both SEM and TEM observation for the deposited films confirmed the hollow structure. Furthermore, observation by SEM for each deposition revealed that the hollow structure was formed during the layer-by-layer assembly process. Differently from that of the hollow capsules formed from template nanoparticles, this method provided directly the hollow structure without any template. Moreover, the water-insoluble LbL film with the hollow structure showed a rapid loading and release of dye molecules such as TMPyP (5,10,15,20-tetrakis(4-N-methylpyridyl)porphinetetra(p-toluenesulfonate)). Due to the chiral nature of the PAGlu, the loaded dye molecule showed induced chirality owing to the interaction with the L-glutamic acid moiety. In addition, this dye-loaded film can show a reversible color and chirality change upon alternative exposure to HCl and NH3 gases, realizing a gas sensing chiroptical switch.
Starting Page	11447
Ending Page	11452
Page Count	6
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	7
Issue Number	24
Journal	Soft Matter
DOI	10.1039/c1sm06523h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Dye Ammonia Transmission electron microscopy Carboxylic acid Enantiomer Chirality Polymer Paglu Allylamine Hydrogen chloride
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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Layer-by-layer assembly of a new l-glutamic acid based polymer with PAH: formation of hollow sphere during deposition, dye loading and chiroptical switch

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