Abstract
The high efficiency and mild reaction conditions associated with the Cu(I) catalyzed cycloaddition of azides and alkynes were exploited for the covalent layerby-layer synthesis of dendritic thin films on silicon wafers. The preparation of azide and alkyne-terminated dendrimers based on bisMPA was accomplished by a divergent strategy; combinations of these monodisperse building blocks from the 2nd to the 5th generation were used for construction of the thin films. The layer-by-layer self assembly process proceeds under ambient conditions and was monitored by ellipsometry, XPS, and ATR-IR, which showed extremely regular growth of the dendritic thin films. Film thickness could be accurately controlled by both the size/generation number of the dendrimers as well as the number of layers. In comparison with linear analogues, the growth of the dendritic films was significantly more controlled and defect-free with each layer being thinner than the corresponding films prepared from the isomeric linear polymers, demonstrating the well-defined, three-dimensional nature of the dendritic architecture.
Original language | English (US) |
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Pages (from-to) | 2835-2846 |
Number of pages | 12 |
Journal | Journal of Polymer Science, Part A: Polymer Chemistry |
Volume | 45 |
Issue number | 14 |
DOIs | |
State | Published - Jul 15 2007 |
Externally published | Yes |
Keywords
- Dendrimers
- Functionalization of polymers
- Layer growth
- Thin films
ASJC Scopus subject areas
- Polymers and Plastics
- Organic Chemistry
- Materials Chemistry