Stepwise self-assembly of a block copolymer-platinum (II) complex-hybrid in solvents of variable quality: from worm-like micelles to free-standing sheets to vesicle-like nanostructures
Stepwise self-assembly of a block copolymer-platinum (II) complex-hybrid in solvents of variable quality: from worm-like micelles to free-standing sheets to vesicle-like nanostructures
复制标题
嵌段共聚物-铂 (II) 复合杂化物在不同质量的溶剂中逐步自组装：从蠕虫状胶束到独立片材再到囊泡状纳米结构
DOI：
10.1039/c7sm01055a
复制
发表时间：
2017
期刊：
影响因子：
3.4
通讯作者：
Bu Weifeng
中科院分区：
文献类型：
--
作者：
Liu Nijuan;He Qun;Wang Yongyue;Bu Weifeng
研究了嵌段共聚物-铂（II）配合物杂化物自组装形成蠕虫状胶束的过程，考察了溶剂质量对胶束形成的影响。当溶剂质量适度减弱时，获得单层的自支撑片，其中蠕虫状胶束折断以与一些短蠕虫一起形成星星胶束。极端恶化的溶剂质量导致单层囊泡状纳米结构，其上仅出现星星胶束。在中等溶剂质量下，片材与囊泡状纳米结构共存。这与关于从片状到囊泡状纳米组装体的形态转变的机械见解密切相关。在这些聚集体中，短蠕虫和星星胶束仍然保持其核壳结构。此外，这些非常规的超结构与它们的发光性质密切相关。这一结果挑战了传统的范例的两亲性自组装的表面活性剂和嵌段共聚物在选择性溶剂中，在那里他们形成双层纳米结构，并普遍需要重新安排从胶束到囊泡的形态过渡期间。
The self-assembly process of formation of worm-like micelles of a block copolymer–platinum(II) complex hybrid is investigated with respect to the influence of solvent quality. When the solvent quality is moderately weakened, unilamellar free-standing sheets are achieved, in which the worm-like micelles snap off to form star micelles together with a few short worms. Extremely worsened solvent quality leads to unilamellar vesicle-like nanostructures, onto which only star micelles emerged. With the intermediate solvent quality, the sheets coexist with the vesicle-like nanostructures. This is well correlated with mechanistic insights regarding the morphological transition from sheet- to vesicle-like nanoassemblies. In these aggregates, short worms and star micelles still hold their core–shell structures. Furthermore, these unconventional superstructures are well interrelated with their luminescence properties. This result challenges the conventional paradigm of the amphiphilic self-assembly of surfactants and block copolymers in selective solvents, where they form bilayered nanostructures and are required universally to be rearranged during the morphological transition from micelles to vesicles.