Supramolecular Nanostructures from Self-Assembly of Amphiphilic Rod-Coil Molecules
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- 英文论文题名：Supramolecular Nanostructures from Self-Assembly of Amphiphilic Rod-Coil Molecules
- 论文作者：Long Yi Jin
- 英文论文作者：Long Yi Jin ; Department of Chemistry ; College of Science ; Yanbian University
- 年：2016
- 作者机构：Department of Chemistry, College of Science, Yanbian University;
- 英文论文关键词：self-assembly ; coil-rod-coil molecules ; supramolecular structures ; phase behavior
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十四分会：超分子组装与软物质材料
- 语种：英文
- 分类号：O641.3
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十四分会 ; 超分子组装与软物质材料
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：91k
- 原文格式：D
- 会议级别：全国
摘要
H-shaped, n-shaped, bent-shaped and linear rod-coil molecules, consisting of biphenyls and a p-terphenyl or phenyl unit linked together with ether bonds as a rod segment and poly(ethylene oxide)(PEO) with various degree of polymerization as coil segments were synthesized. These molecules contain lateral alkyl groups in the middle of benzene ring and lateral methyl groups between the rod and coil segments. The self-assembling behavior of these molecules was investigated by means of DSC, POM, AFM, TEM and SAXS in the bulk and aqueous solutions. Molecules with non lateral units self-assemble into a lamellar and a hexagonal perforated layer structure in the crystalline phase and the liquid crystalline phase, respectively. While, molecules incorporating lateral methyl groups between the rod and coil segments spontaneously self organize into hexagonal perforated layer, oblique columnar or 3-D body centered tetragonal structures. In aqueous solutions, molecules with non lateral units self-assemble into nanoribbon or fibrous aggregates, whereas, molecules with a lateral groups exhibit self-organizing capacity to form helical fibers. Notably, CD experiments together with AFM investigations of these molecules reveal that the helical sense switches to opposite-handedness, depending on the temperature of aqueous solution. These results reveal that self-assembling behavior of these molecules is dramatically influenced by lateral alkyl groups in the middle of rod segment and lateral methyl groups between the rod and coil segments.
H-shaped, n-shaped, bent-shaped and linear rod-coil molecules, consisting of biphenyls and a p-terphenyl or phenyl unit linked together with ether bonds as a rod segment and poly(ethylene oxide)(PEO) with various degree of polymerization as coil segments were synthesized. These molecules contain lateral alkyl groups in the middle of benzene ring and lateral methyl groups between the rod and coil segments. The self-assembling behavior of these molecules was investigated by means of DSC, POM, AFM, TEM and SAXS in the bulk and aqueous solutions. Molecules with non lateral units self-assemble into a lamellar and a hexagonal perforated layer structure in the crystalline phase and the liquid crystalline phase, respectively. While, molecules incorporating lateral methyl groups between the rod and coil segments spontaneously self organize into hexagonal perforated layer, oblique columnar or 3-D body centered tetragonal structures. In aqueous solutions, molecules with non lateral units self-assemble into nanoribbon or fibrous aggregates, whereas, molecules with a lateral groups exhibit self-organizing capacity to form helical fibers. Notably, CD experiments together with AFM investigations of these molecules reveal that the helical sense switches to opposite-handedness, depending on the temperature of aqueous solution. These results reveal that self-assembling behavior of these molecules is dramatically influenced by lateral alkyl groups in the middle of rod segment and lateral methyl groups between the rod and coil segments.
H-shaped, n-shaped, bent-shaped and linear rod-coil molecules, consisting of biphenyls and a p-terphenyl or phenyl unit linked together with ether bonds as a rod segment and poly(ethylene oxide)(PEO) with various degree of polymerization as coil segments were synthesized. These molecules contain lateral alkyl groups in the middle of benzene ring and lateral methyl groups between the rod and coil segments. The self-assembling behavior of these molecules was investigated by means of DSC, POM, AFM, TEM and SAXS in the bulk and aqueous solutions. Molecules with non lateral units self-assemble into a lamellar and a hexagonal perforated layer structure in the crystalline phase and the liquid crystalline phase, respectively. While, molecules incorporating lateral methyl groups between the rod and coil segments spontaneously self organize into hexagonal perforated layer, oblique columnar or 3-D body centered tetragonal structures. In aqueous solutions, molecules with non lateral units self-assemble into nanoribbon or fibrous aggregates, whereas, molecules with a lateral groups exhibit self-organizing capacity to form helical fibers. Notably, CD experiments together with AFM investigations of these molecules reveal that the helical sense switches to opposite-handedness, depending on the temperature of aqueous solution. These results reveal that self-assembling behavior of these molecules is dramatically influenced by lateral alkyl groups in the middle of rod segment and lateral methyl groups between the rod and coil segments.
引文
[1]Yang Liu,Keli Zhong,Zhaohua Li,Tie Chen,Myoongsoo Lee,Long Yi Jin*,Synthesis and Self-assembly of Amphiphilic Bent-Shaped Molecules Based on Dibenzo[a,c]Phenazine and Poly(ethyleneoxide)Units,Polym.Chem.2015,6,7395.
[2]Zhaoyang Lu,Keli Zhong,Yang Liu,Zhaohua Li,Tie Chen,Long Yi Jin*,Self-organizing p-quinquephenyl building blocks incorporating lateral hydroxyl groups into supramolecular nano-assemblies,Soft matter,in press.
[2]Zhaoyang Lu,Keli Zhong,Yang Liu,Zhaohua Li,Tie Chen,Long Yi Jin*,Self-organizing p-quinquephenyl building blocks incorporating lateral hydroxyl groups into supramolecular nano-assemblies,Soft matter,in press.