To Combine Precursor Assembly and Layer-by-layer Deposition for Incorporation of Single-charged Species: Nanocontainers with Charge-selectivity and Nanoreactors

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• 作者：Huan Chen ; Guanghong Zeng ; Zhiqiang Wang ; Xi Zhang ; Ming-Li Peng ; Li-Zhu Wu ; and Chen-Ho Tung
• 刊名：Chemistry of Materials
• 出版年：2005
• 出版时间：December 27, 2005
• 年：2005
• 卷：17
• 期：26
• 页码：6679 - 6685
• 全文大小：466K
• 年卷期：v.17,no.26(December 27, 2005)
• ISSN：1520-5002

文摘

We describe a method to fabricate single-charged functional species of sodium 9-anthracenepropionate(SANP) into poly(diallyldimethylammonium chloride) (PDDA)/poly(4-styrenesulfonate) (PSS) multilayerfilm by precursor assembly in bulk and then layer-by-layer (LbL) deposition at interface. By formationof PDDA-SANP complex in aqueous solution and then deposition in alternation with PSS, SANP wassuccessfully introduced into PDDA/PSS multilayer assemblies. Our detailed experiment revealed thatthe release rate of SANP from the film was related to the concentration of electrolyte in aqueous solution,and the fast adsorption of SANP onto the film was related to the positively charged binding sites in thefilm. These binding sites, which were formed by desorption of SANP, can attract negatively chargedmolecules and repulse positively charged molecules in aqueous solution. In addition, photocycloadditionreaction of SANP can take place with a quantum yield 4 times higher than that in solution, suggestingthat LbL assemblies are good candidates as nanoreactors.