Structural changes of polyion complex Langmuir–Blodgett films accompanied by polymerization of amphiphilic diacetylene
Structural changes of polyion complex Langmuir–Blodgett films accompanied by polymerization of amphiphilic diacetylene
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两亲性丁二炔聚合过程中聚离子络合物Langmuir-Blodgett薄膜的结构变化
DOI：
10.1016/s0927-7757(01)00918-9
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Matsumoto
中科院分区：
文献类型：
--
作者：
H. Tachibana;Yasushi Yamanaka;H. Sakai;M. Abe;M. Matsumoto
该地区的每个分子12-pentacosadiynoic酸(DA)在纯水子阶段是小于水子阶段包含一种水溶性聚合物,polyallylamine (PAA),在单体的浓度单位PAA 0.01毫米。LB膜的透射红外光谱传输的DA从PAA-containing子阶段显示存在两种DA在LB膜,一分之一deprotonated形式和游离酸的其他形式。XPS光谱表明，在LB膜中，一半DA分子与PAA形成盐态，另一半以游离酸态存在。紫外光照射后，在540 nm（红相）和630 nm（蓝相）处同时出现两条吸收带。随着照射时间的延长，只有两波段的强度逐渐增加，两波段的位置和强度比没有明显变化。在辐照前，薄膜是二维的，除了表面有一些三维的晶体结构。在紫外光的照射下，这些三维结构得到了发展，并出现了新的三维晶体结构，形成了长几十μm、宽几μm、高6 nm的三维结构。荧光显微镜显示，红色相被限制在三维结构中。
The area per molecule of 10,12-pentacosadiynoic acid (DA) was smaller on a pure water subphase than on an aqueous subphase containing a water-soluble polymer, polyallylamine (PAA), at a concentration of the monomer unit of PAA of 0.01 mM. The transmission IR spectra of the LB films of DA transferred from a PAA-containing subphase showed the presence of two species of DA in the LB films, the one in a deprotonated form and the other in the free acid form. The XPS spectra showed that a half of DA molecules formed salt with PAA and that the other half was in the free acid form in the LB films. When the films were irradiated with UV light, two absorption bands appeared at 540 nm (red phase) and 630 nm (blue phase) simultaneously. Upon prolonged irradiation, only the intensities of the two bands increased gradually without noticeable changes in the band positions and the intensity ratio of the two bands. Before irradiation, the films were two-dimensional except for some three-dimensional crystalline structures on the surface. On irradiation of UV light, these three-dimensional structures developed and new three-dimensional crystalline structures also appeared, resulting in three-dimensional structures with several tens of μm in length, a few μm in width and 6 nm in height. Fluorescence microscopy indicated that the red phase was confined within the three-dimensional structures.