Langmuir-Blodgett Films of C60-end-capped Poly(ethylene oxide)

Synthesis, characterization, and self-assembly of a POSS-based Janus molecular particle

“…巨型分子(giant molecules)是Cheng等 [1,2] 近10年来 发展的一类新型软物质大分子, 在分子科学与工程领 域的探索中发挥着越来越重要的作用. 巨型分子兼有 类似嵌段聚合物的本体相分离行为和类似表面活性剂 的溶液组装行为, 同时还表现出丰富的液晶态中间相 行为, 在亚10 nm图案化 [3,4] 、大分子动力学 [5,6] 、单分 子膜 [7] 、生物大分子偶联改性 [8] 、非传统相态(如Frank-Kasper相)的发现 [9,10] 等方面表现出独特的价值和应用 前景. 随着巨型分子的发展, 它们的功能性也备受关 注, 在光电材料 [11~13] 、氟离子监测 [14] 、油水分离 [15] 、 矿物筛选 [16] 等领域都有相关报道, 取得了不少进展.…”

Interfacial Behavior of Giant Amphiphiles Composed of Azobenzene and Polyhedral Oligomeric Silsesquioxane

“…A Langmuir monolayer on a water surface is an excellent model system for studying ordering in 2D. Langmuir films of amphiphilic molecules, such as small-molecule surfactants, lipids, and block copolymers, have been studied for many years. − Owing to its tunable photoresponsive properties, the azobenzene unit has been incorporated into amphiphilic molecule systems to fabricate various functional thin films. − …”

Morphological Variation of an LB Film of Giant Amphiphiles Composed of Poly(ethylene oxide) and Hydrophobically Modified POSS

“…28−39 Our previous work found that LB films of giant amphiphiles, containing a hydrophobic fluorinated MNP head and a poly(ethylene oxide) (PEO) tail, will show a fractal growth pattern if the PEO segment is long enough. 40,41 The LB film of the amphiphilic block copolymer PS-b-PEO does not show the fractal growth pattern despite containing a long PEO segment. 42−45 In this work, we synthesize a series of giant amphiphiles with different hydrophobic modifications to the POSS head and a PEO tail of fixed length.…”

“…Recently, a new type of giant amphiphiles that comprise “molecular nanoparticles (MNPs)” have been reported. − MNPs, such as polyhedral oligomeric silsesquioxanes (POSS), fullerene (C 60 ), or polyoxometalates (POM), have well-defined molecular structures, specific symmetry, and good shape and volume persistence, and act as hydrophobic, hydrophilic, or both parts of the giant amphiphiles. − Compared with traditional amphiphilic polymers, these giant amphiphiles show different interfacial behaviors due to their rigid conformation and less entanglement. , The platform of the Langmuir–Blodgett (LB) film provides effective tools to investigate the interfacial assembly of amphiphilic molecules. − Our previous work found that LB films of giant amphiphiles, containing a hydrophobic fluorinated MNP head and a poly­(ethylene oxide) (PEO) tail, will show a fractal growth pattern if the PEO segment is long enough. , The LB film of the amphiphilic block copolymer PS- b -PEO does not show the fractal growth pattern despite containing a long PEO segment. − …”