Photoinduced mass transport using amorphous molecular materials

使用无定形分子材料的光诱导质量传输

基本信息

批准号：
16550156
负责人：
NAKANO Hideyuki
金额：
$ 2.37万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

In the present study, we have designed and synthesized several novel photochromic amorphous molecular materials and investigated their photochromic properties and photoinduced mass transport as follows :(1)A significant effect of molecular structure on the photoinduced surface relief grating formation was found for novel azobenzene-based photochromic amorphous molecular materials, N, N'-diphenyl-p-phenylenediamine and N, N-bis[4-(phenylazo)-phenyl]-N', N'-diphenyl-p-phenylenediamine, where the positions of the two azobenzene groups in the p-phenylenediamine core are different from each othe.(2)A novel azobenzene-based photochromic amorphous molecular material, tris[4-(phenylazo)phenyl]amine (TPAPA), was designed and synthesized. TPAPA was found to readily form an amorphous glass with a glass-transition temperature of 67℃ and to exhibit photochromism as amorphous film. Irradiation of amorphous film of TPAPA with two coherent Ar^+ laser beams led to the formation of surface relief gratin … More g with a diffraction efficiency of 2〜3% and a modulation depth of ca. 100nm.(3)Dichroism of amorphous film of an azobenzene-based photochromic amorphous molecular material, 4-[bis(9,9-dimethylfluoren-2-yl)amino]-azobenzene (BFlAB), induced by irradiation with linearly polarized Ar^+ laser light has been investigated.(4)The photochromic reaction of an azobenzene-based photochromic amorphous molecular material, BFlAB, has been investigated. It was found that the backward cis-trans thermal isomerization of the photogenerated cis-isomer of BFlAB as amorphous film is accelerated relative to that in solution and that this acceleration effect becomes much more prominent as the irradiation time for generating the cis-isomer decreases. The results indicate that the local free volume of the amorphous film gradually increases during the repeated trans-cis and cis-trans photoisomerizations of the azobenzene chromophore.(5)Photoinduced surface relief grating formation on an organic single crystal by irradiation with two coherent laser beams has been demonstrated by using 4-(dimethylamino)azobenzene. It was found that the SRG formation was greatly depending upon both the coordination of the crystal and the polarization of the writing beams. The dependence of the polarization of writing beams on the SRG formation using the single crystal was found to be quite different from that reported for amorphous polymers and photochromic amorphous molecular materials, suggesting that the mechanism of the SRG formation on the organic crystal is somewhat different from that on amorphous materials. Less

In the present study, we have designed and synthesized several novel photochromic amorphous molecular materials and investigated their photochromic properties and photoinduced mass transport as follows:(1)A significant effect of molecular structure on the photoinduced surface relief grating formation was found for novel azobenzene-based photochromic amorphous molecular materials, N, N'-diphenyl-p-phenylenediamine and N, N-bis[4-(phenylazo)-phenyl]-N', N'-diphenyl-p-phenylenediamine, where the positions of the two azobenzene groups in the p-phenylenediamine core are different from each other.(2)A novel azobenzene-based photochromic amorphous molecular material, tris[4-(phenylazo)phenyl]amine (TPAPA), was设计和合成。发现TPAPA很容易形成一个无定形玻璃，其玻璃过渡温度为67℃，并且表现为无定形膜的光更色素。用两个连贯的AR^+激光束对TPAPA的无定形膜的辐照导致表面缓解颗粒蛋白的形成……更多的G，衍射效率为2-3％，调制深度为Ca。 100nm。（3）基于偶氮苯基的光致变色分子材料的无定形膜的二分法，4- [Bis（9,9-二甲基氟-2-基）氨基]氨基] - 氮偶苯（BFLAB）（BFLAB），通过线性极化Ar^+ haser libl诱导，已被调查（4）。已经研究了基于偶氮苯的光致变色分子材料Bflab。发现BFLAB的光生成顺式异构体的向后顺式Trans热异构体是无定形膜相对于溶液加速的，并且随着产生顺式异构体下降的辐照时间，这种加速效应变得更加突出。结果表明，在重复的反式转基线和顺式传输和顺式传播过程中，无偶氮苯偶氮发色子的光异构体逐渐增加。（5）通过使用两个相干激光束，通过使用4--（二二甲酰胺）证明了光诱导的有机单晶体对有机单晶体的表面浮雕形成。发现SRG形成很大程度上取决于晶体的配位和写作梁的极化。发现使用单晶体的写作光束对SRG形成的极化依赖性与报道的无定形聚合物和光致变色的无定形分子材料的依赖性，这表明有机晶体上SRG形成的机制与无形材料上的有所不同。较少的