Zhang Xianfeng, Lv Longfei, Wu Guanhong, Yang Dong, Dong Angang
State Key Laboratory of Molecular Engineering of Polymers , Department of Macromolecular Science , Fudan University , Shanghai 200433 , China.
iChem , Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Department of Chemistry , Fudan University , Shanghai 200433 , China . Email:
Chem Sci. 2018 Apr 2;9(16):3986-3991. doi: 10.1039/c8sc00220g. eCollection 2018 Apr 28.
Directed co-assembly of binary nanoparticles (NPs) into one-dimensional copolymer-like chains is fascinating but challenging in the realm of material science. While many strategies have been developed to induce the polymerization of NPs, it remains a grand challenge to produce colloidal copolymers with widely tailored compositions and precisely controlled architectures. Herein we report a robust colloidal polymerization strategy, which enables the growth of sophisticated NP chains with elaborately designed structures. By quantifying NP assembly statistics and kinetics, we establish that the linear assembly of colloidal NPs, with the assistance of PbSO clusters, follows a step-growth polymerization mechanism, and on the basis of this, we design and fabricate NP chains structurally analogous to random, block, and alternating copolymers, respectively. Our studies offer mechanistic insights into cluster-mediated colloidal polymerization, paving the way toward the rational synthesis of colloidal copolymers with quantitatively predicted architectures and functionalities.
将二元纳米颗粒（NPs）定向共组装成一维共聚物样链在材料科学领域既引人入胜又具有挑战性。虽然已经开发了许多策略来诱导纳米颗粒的聚合，但制备具有广泛定制组成和精确控制结构的胶体共聚物仍然是一个巨大的挑战。在此，我们报告了一种稳健的胶体聚合策略，该策略能够生长具有精心设计结构的复杂纳米颗粒链。通过量化纳米颗粒组装统计数据和动力学，我们确定在PbSO簇的辅助下，胶体纳米颗粒的线性组装遵循逐步增长聚合机制，并在此基础上分别设计和制造了结构类似于无规、嵌段和交替共聚物的纳米颗粒链。我们的研究为簇介导的胶体聚合提供了机理见解，为合理合成具有定量预测结构和功能的胶体共聚物铺平了道路。
