期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 43, 页码 13871-13875出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201404141
关键词
amphiphilic systems; cooperativity; pi-conjugated systems; polymers; self-assembly
资金
- VCI
- Carl-Zeiss foundation
- Thuringian Ministry for Education, Science and Culture [B514-09051]
- NanoConSens [B515-10065]
- Humboldt Foundation
- U.S. Schubert
We report an innovative template-assisted synthetic protocol for the selective functionalization of terminal triple bonds in oligophenyleneethynylenes (OPE) by pre-organization in aqueous solution. By this approach, three new OPE-based bolaamphiphiles substituted with hydrophilic poly(2-ethyl-2-oxazoline) (PEtOx) chains of different length have been synthesized. The chain length was observed to strongly influence the aqueous supra-molecular polymerization: bolaamphiphiles with longer hydrophilic chains aggregate into spherical nanoparticles in a stepwise fashion, whereas 2D anisotropic platelets are formed cooperatively if shorter PEtOx chains are used. Our results demonstrate that hydrophobic interactions can be strong enough to trigger cooperative effects in aqueous self-assembly processes.
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