Stereochemical Sequence Dictates Unimolecular Diblock Copolymer Assembly.
Stereochemical Sequence Dictates Unimolecular Diblock Copolymer Assembly.
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DOI:
10.1021/jacs.7b12696
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发表时间:
2018-02-07
影响因子:
15
通讯作者:
Johnson JA
中科院分区:
文献类型:
--
作者:
Golder MR;Jiang Y;Teichen PE;Nguyen HV;Wang W;Milos N;Freedman SA;Willard AP;Johnson JA
Deciphering the significance of length, sequence, and stereochemistry in block copolymer self-assembly remains an ongoing challenge. A dearth of methods to access uniform block co-oligomers/polymers with precise stereochemical sequences has precluded such studies. Here, we develop iterative exponential growth (IEG) methods for the synthesis of a small library of unimolecular stereoisomeric diblock 32-mers. X-ray scattering reveals that stereochemistry modulates the phase behavior of these polymers, which we rationalize based on simulations carried out on a theoretical model system. This work demonstrates that stereochemical sequence can play a crucial role in unimolecular polymer self-assembly.
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