Layered photochromic films stacked from spiropyran-modified montmorillonite nanosheets.
Layered photochromic films stacked from spiropyran-modified montmorillonite nanosheets.
复制标题
由螺吡喃改性蒙脱土纳米片堆叠而成的层状光致变色薄膜
作者：
二维（2D）纳米片是一类迷人的主体材料，其表现出用于固定功能分子的高比表面积。在此，我们描述了一个层状光致变色膜使用蒙脱石二维纳米片固定螺吡喃单元，这表明了显着的和可逆的光致变色行为。层状光致变色膜的合成包括使用螺吡喃改性的表面活性剂和随后的真空过滤将蒙脱土粉末插层和剥离成2D纳米片。螺吡喃修饰的季铵基团的光致变色单元在插层和剥离过程中与蒙脱土中的天然阳离子交换后，通过静电相互作用固定在蒙脱土2D纳米片的表面。在可见光/紫外光照射下，螺吡喃单元在闭环螺吡喃和开环汞之间的光异构化有助于层状膜的光致变色行为。在插层和剥离过程中，通过增加螺吡喃改性的阳离子表面活性剂的量来优化光致变色膜的显色和脱色状态之间的颜色对比度。我们的层状薄膜具有可见光致变色行为，可能会促进其在光数据存储，光开关和化学传感等方面的应用。
Two-dimensional (2D) nanosheets are a class of fascinating host material that demonstrates a high specific surface area for the immobilization of functional molecules. Herein, we describe a layered photochromic film using montmorillonite 2D nanosheets immobilized with spiropyran units, which demonstrates a remarkable and reversible photochromic behavior. The synthesis of the layered photochromic film includes the intercalation and exfoliation of montmorillonite powders into 2D nanosheets using a spiropyran-modified surfactant and a subsequent vacuum filtration. The photochromic units of spiropyran-modified quaternary ammonium groups are immobilized on the surface of montmorillonite 2D nanosheets through an electrostatic interaction after exchanging with the native cations in montmorillonite during the intercalation and exfoliation. The photoisomerization of the spiropyran units between closed-ring spiropyran and open-ring merocyanine upon visible/UV irradiation contributes to the photochromic behavior of the layered film. The color contrast between the coloration and decoloration states of photochromic film is optimized by increasing the amount of spiropyran-modified cationic surfactant during the intercalation and exfoliation process. Our layered films with a visual photochromic behavior may promote their applications for optical data storage, optical switching and chemical sensing.
登录
查看更多内容
影响因子：
5.6
作者：
He, Hongping;Ma, Yuehong;Qing, Yanhong
通讯作者：
Qing, Yanhong
影响因子：
3.3
作者：
Levitus, M;Aramendía, PF
通讯作者：
Aramendía, PF
影响因子：
3.9
作者：
OKAHATA, Y;SHIMIZU, A
通讯作者：
SHIMIZU, A
影响因子：
9.9
作者：
Sakai, Hideki;Ebana, Hiroatsu;Abe, Masahiko
通讯作者：
Abe, Masahiko
DOI：
10.1016/j.colsurfa.2007.10.036
发表时间：
2008-03-20
影响因子：
5.2
作者：
Saso, Naoki;Yamamoto, Takashi;Einaga, Yasuaki
通讯作者：
Einaga, Yasuaki