Abstract
It is well-known that non-covalent interaction plays important roll in biological events, such as double-helix formation of nucleotides and molecular recognition of proteases. Since the non-covalent interaction is reversible in contrast to covalent bonds, the materials containing non-covalent interaction have a potential to show dynamic properties by external stimuli. This paper reviews our recent approach to prepare the complexes of terminal functions of dendrimers and linear polymers via multiple hydrogen bondings. Dendritic aromatic polyamides having carboxyl groups on the periphery were prepared as multiple-donor molecules. The dendritic polyamide/poly (4-vinylpyridine)(P4VP) complex showed a single glass transition temperature whose temperature was highly dependent on the donor/acceptor ratio. NMR study of the complexes clearly demonstrates that the multiple hydrogen bondings are essential to immobilize P4VP segments in solution. Novel dendritic polyamide-co-poly (4-vinylpyridine) block copolymer was prepared by atom transfer radical polymerization of 4-vinylpyridine initiated by the dendritic macroinitiator. The dynamic light scattering and 1H NMR spectra suggest that the intra- or intermolecular interaction of the copolymer is highly dependent on the solvent used for the measurements.
