自组装亚-混合物的光诱导曲
Sufang Guo1, Kimihiro Matsukawa2, Takashi Miyata3
1Institute for Nanoscience & Technology, Waseda University , 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan.
Journal of the American Chemical Society
|November 18, 2015
概括
研究人员开发了一种新型的亚博-素材料, 这种材料在紫外线下呈现可逆曲和d-spacing变化,
科学领域:
- 材料科学
- 聚合物化学
- 纳米技术
背景情况:
- 对于开发先进技术而言,光响应材料至关重要.
- 亚烯衍生物以其光异构化能力而闻名.
- 基于西洛的材料具有独特的特性,如灵活性和热稳定性.
研究的目的:
- 为了合成一种新的亚博-杂物材料.
- 为了研究其光诱导的宏观运动.
- 探索智能设备和能源转换中的潜在应用.
主要方法:
- 一步式有机自组装
- 通过乙烯点击反应与阿佐基合成酒精基前体.
- 水解和多重凝结形成混合膜.
主要成果:
- 已经成功地制备了具有顺序的片状结构的片.
- 一个带有悬挂的亚博基团的薄膜在紫外线照射时显示出可逆的d间隔变化.
- 一个带有桥接阿佐基的柔性薄膜表现出可逆的曲-不曲运动,这对于光诱导的扭曲至关重要.
结论:
- 这种新型的亚博-杂物材料表现出光诱导的宏观运动.
- 该材料具有出色的性能,包括高弹性模量,热稳定性和在广泛的温度范围内具有很大的光诱导曲幅度.
- 这项工作是关于含有亚博的基材料的光诱导宏观运动的第一份报告,突出了它们对智能设备和能量转换系统的潜力.
相关概念视频
Cycloaddition Reactions: MO Requirements for Photochemical Activation
2.9K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.9K
Photochemical Electrocyclic Reactions: Stereochemistry
2.4K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
2.4K
Unsymmetric Bending
950
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
950
Mechanisms of Membrane-bending
3.7K
The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
3.7K
Structure of Benzene: Molecular Orbital Model
13.7K
According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).
13.7K


