Orthogonally Self‐Assembled Multifunctional Block Copolymers |
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Authors: | Ashootosh?V Ambade Dr Caroline Burd Dr Mary Nell Higley Kamlesh?P Nair Dr Marcus Weck Prof |
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Institution: | 1. Molecular Design Institute and Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 (USA), Fax: (+1)?212‐995‐4895;2. School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, GA 30332 (USA) |
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Abstract: | We report the synthesis of telechelic poly(norbornene) and poly(cyclooctene) homopolymers by ring‐opening metathesis polymerization (ROMP) and their subsequent functionalization and block copolymer formation based on noncovalent interactions. Whereas all the poly(norbornene)s contain either a metal complex or a hydrogen‐bonding moiety along the polymer side‐chains, together with a single hydrogen‐bonding‐based molecular recognition moiety at one terminal end of the polymer chain. These homopolymers allow for the formation of side‐chain‐functionalized AB and ABA block copolymers through self‐assembly. The orthogonal natures of all side‐ and main‐chain self‐assembly events were demonstrated by 1H NMR spectroscopy and isothermal titration calorimetry. The resulting fully functionalized block copolymers are the first copolymers combining both side‐ and main‐chain self‐assembly, thereby providing a high degree of control over copolymer functionalization and architecture and bringing synthetic materials one step closer to the dynamic self‐assembly structures found in nature. |
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Keywords: | block copolymers hydrogen bonds metal coordination self‐assembly supramolecular chemistry |
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