Self-assembly of a dendron through multiple ionic interaction to give mesospacing between reactive amine groups on the surface
SCIE
SCOPUS
- Title
- Self-assembly of a dendron through multiple ionic interaction to give mesospacing between reactive amine groups on the surface
- Authors
- Hong, BJ; Shim, JY; Oh, SJ; Park, JW
- Date Issued
- 2003-03-18
- Publisher
- AMER CHEMICAL SOC
- Abstract
- A dendron having nine carboxylic acid groups at the end of the branches and a protected amine at the apex was allowed to form a molecular layer on the aminosilylated surface through multipoint ionic attraction. It was found that a compact and smooth monolayer was obtained at appropriate condition. The film quality was maintained successfully after deprotecting CBZ group with trimethylsilyl iodide. Tapping mode AFM showed individual dendron molecules self-assembled on the aminosilylated surface. The molecular layer formed through the multipoint ionic interaction was strong enough to survive heating at 100 degreesC for 1-2 h in water and dipping in aqueous solutions of pH 4-10 for 3 h. The surface density of the primary amine after the deprotection was measured with fluorometry, and 0.1-0.2 amine group per 100 Angstrom(2) was observed. This implies that the spacing between the amine functional groups is 24-34 Angstrom in hexagonal close-packing (hcp) model.
- Keywords
- ATOMIC-FORCE MICROSCOPY; SENSITIVE DENDRIMER SURFACES; ULTRATHIN MULTILAYER FILMS; CHEMICAL SENSOR ARRAYS; PHASE PROBE MOLECULES; POLY(AMIDOAMINE) DENDRIMERS; STARBURST DENDRIMERS; CONFINED MONOLAYERS; COLLOID MONOLAYERS; CHARGED SURFACES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18638
- DOI
- 10.1021/LA026367U
- ISSN
- 0743-7463
- Article Type
- Article
- Citation
- LANGMUIR, vol. 19, no. 6, page. 2357 - 2365, 2003-03-18
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