Macromolecular Metallurgy of Binary Mesocrystals via Designed Multiblock Terpolymers

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• 作者：Nan Xie ; Meijiao Liu ; Hanlin Deng ; Weihua Li ; Feng Qiu ; An-Chang Shi
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：February 26, 2014
• 年：2014
• 卷：136
• 期：8
• 页码：2974-2977
• 全文大小：281K
• 年卷期：v.136,no.8(February 26, 2014)
• ISSN：1520-5126

文摘

Self-assembling block copolymers provide access to the fabrication of various ordered phases. In particular, the ordered spherical phases can be used to engineer soft mesocrystals with domain size at the 5鈥?00 nm scales. Simple block copolymers, such as diblock copolymers, form a limited number of mesocrystals. However multiblock copolymers are capable to form more complex mesocrystals. We demonstrate that designed B₁AB₂CB₃ multiblock terpolymers, in which the A- and C-blocks form spherical domains and the packing of these spheres can be controlled by changing the lengths of the middle and terminal B-blocks, self-assemble into various binary mesocrystals with space group symmetries of a large number of binary ionic crystals, including NaCl, CsCl, ZnS, 伪-BN, AlB₂, CaF₂, TiO₂, ReO₃, Li₃Bi, Nb₃Sn(A15), and 伪-Al₂O₃. This approach can be generalized to other terpolymers as well as to tetrapolymers to obtain ternary mesocrystals. Our study provides a new concept of macromolecular metallurgy for producing crystal phases in a mesoscale and thus makes multiblock copolymers a robust platform for the engineering of functional materials.