Construction of photofunctional supramolecular nanoobjects and their single molecule lithography

光功能超分子纳米物体的构建及其单分子光刻

• 批准号: 09555292
• 负责人: HORIE Kazuyuki
• 金额: $ 8.26万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555292/
• 关键词: photofunctional molecular device; NSOM; photochemistry of a small number of molecules; Photochemically-induced refractive index change; photo-acid generator; acid-sensitive dye; fluorescence imaging; 単一分子光化学; デンドリマ-ポルフィリン; 光化学ホールバーニング; 色素微環境; 高

Photofunctional molecular device having one-bit information per one molecule is an ultimate ultra-high density memory for humankind. But when we observe a photochemical reaction of a single molecule by using near-field scanning optical microscope (NSOM), the probe light usually may induce a photochemical reaction and destroy the molecule. This research was carried out in order to find appropriate materials system where we can observe photochemistry of single molecule or a small number of molecules by using NSOM.1) Materials showing large refractive index change by photoirradiation : Photodimerization of poly (vinyl cinnamate) and photoelimination of diazo-and azido-groups showed very large change in refractive index after photoirradiation without diminishing the transparency of the films. These systems can be good candidates for transmittance detection of NSOM.2) Photoacid generator-Acid-sensitive dye system : A polymer film dispersed with 4-nitrobenzyl-9,10-dimethoxyanthraccne-2-sulfonate (NAS) and Nile Blue A base(NBAb)was prepared and photo irradiated at 422 nm. Photodecomposition of NAS produced proton, which diffuses and reacts with NBAb resulting in cationic NAB (NBA^+). Photochemical reaction and successive NSOM imaging were made possible by the selection of three different wavelength (422, 488, 620 nm).

光功能分子器件具有一个分子一位的信息，是人类终极的超高密度存储。但当我们用近场扫描光学显微镜(NSOM)观察单个分子的光化学反应时，探测光通常会引发光化学反应并破坏分子。1)具有较大折射率变化的材料：聚肉桂酸乙烯酯的光二聚反应和重氮和叠氮基团的光消除在不降低薄膜透明度的情况下，表现出很大的折射率变化。2)光生酸剂-酸敏染料体系：制备了一种以4-nitrobenzyl-9，10-dimethoxyanthraccne-2-sulfonate和尼罗蓝A碱为分散剂的聚合物薄膜，并在422 nm处进行了光照射。NAS的光解产生质子，质子扩散并与NBAb反应生成阳离子NaB(NBA^+)。通过选择三个不同的波长(422,488,620 nm)，实现了光化学反应和连续的NSOM成像。

项目成果

S.Murase, K.Horie: "Large Photoinduced Refractive Index Changes of Transparent Polymer Films Containing Photoeliminable Diazo- and Azido- Groups" Macromolecules. 32 (4). 1103-1110 (1999)

S.Murase、K.Horie：“含有光可消除重氮基和叠氮基的透明聚合物薄膜的大光致折射率变化”大分子。

S.Murase, K.Kinoshita, K.Hiroe, S.Morino: "Photo-optical Control with Large Refractive Index Changes by Photodimerization of Poly (vinyl cinnamate) Film" Macromolecules. 30 (25). 8088-8090 (1997)

S.Murase、K.Kinoshita、K.Hiroe、S.Morino：“通过聚（肉桂酸乙烯酯）薄膜的光二聚作用实现大折射率变化的光光控制”大分子。

K.Horie: "Photo-optical Control of Polymers and Photochemistry of Nanoparticles" Kobunshi. 47 (7). 461-464 (1998)

K.Horie：“聚合物的光光控制和纳米颗粒的光化学”Kobunshi。

K.Yoshii, T.Yamashita, S.Machida, K.Horie, et al.: "Photo-Probe Study on Microstructure of Siloxane Polymers 1. Local Free Volume of an MQ-type Silicone Resin Containing Crosslinked Nanoparticles Probed by Photoisomerization of Azobenzene" J.Non-crystalli

K.Yoshii、T.Yamashita、S.Machida、K.Horie 等人：“硅氧烷聚合物微观结构的光探针研究 1. 通过偶氮苯的光异构化探测含有交联纳米粒子的 MQ 型有机硅树脂的局部自由体积

S.Murase,K.Horie: "Large Photoinduced Refractive Index Changes of Transparent Polymer Films Containing Photoeliminable Diazo- and Azido-Groups" Macromolecules. (印刷中).

S. Murase、K. Horie：“含有可光消除重氮基和叠氮基的透明聚合物薄膜的大光致折射率变化”（正在印刷中）。