ORGANIC PHOTOCHROMIC COMPOUND

有机光致变色化合物

• 批准号: 05452039
• 负责人: KURITA Susumu
• 金额: $ 4.61万
• 依托单位: YOKOHAMA NATIONAL UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452039/
• 关键词: photochromism; optical property of organic crystal; fulgide; photochromic organic compound; molecular crystal; 光誘起構造変化

Organic photochromic compounds which have different kinds of transformation mechanism are brought up for the studies of optical properties and photoreaction in solid form : furylfulgide (electrocyclization), azobenzene (E-Z isomerization and N-salicylideneaniline (hydrogen transfer). The conditions of crystal growth are found. Polarized reflection spectra of the single crystals are measured for wide energy range from 1 to 30 eV,and results are transformed to absorption spectra by the K-K relation. The spectra are well understood by the energy diagram of single molecule (pi-pi* transition), though the spectra are shift to the lower energy a little by forming Frenkel excitons in the crystal.A try of material control by light, using single crystals of the photochromic compounds is done successfully. A film of the isomer on the fulgide crystal surface is grown by irradiation of the light with large absorption coefficient. The film has absorption only for the light polarized parallel to the b axis of the crystal, showing that the films are well oriented. Optical doping in to the crystal by light is also done by irradiation of the light with small absorption coefficient. An absorption band by the photoproduced material shows blue shift with increasing the amounts of the produced material for the film, on the other hand, red shift for the photodoped materials which are dilute in density compared with the surface film. All the photoproduced material on the surface or inside of the crystal was able to be erased by the irradiation of the visible light.Furylfulgides with different sizes of alkyl substitituents were synthesized and their photochromic properties of the quantum yield of coloration, bleaching quantum yeild and the change of the absorption spectra were examined.

为了研究固态光致变色化合物的光学性质和光反应，提出了具有不同转变机制的有机光致变色化合物：呋喃俘精酸酐（电环化）、偶氮苯（E-Z异构化）和N-水杨醛苯胺（氢转移）。在1 ~ 30 eV的宽能量范围内测量了单晶的偏振反射谱，并通过K-K关系将测量结果转化为吸收谱。通过单分子能量图（π-π * 跃迁）可以很好地理解光谱，但由于晶体中Frenkel激子的形成，光谱向低能方向移动了一点，成功地进行了光致变色化合物单晶的光控材料尝试。通过具有大吸收系数的光的照射，在俘精酸酐晶体表面上生长异构体的膜。该薄膜仅对平行于晶体B轴的偏振光有吸收，表明薄膜具有良好的取向性。通过光对晶体的光学掺杂也通过具有小吸收系数的光的照射来完成。光致材料的吸收带随着膜的产生材料的量的增加而显示蓝移，另一方面，与表面膜相比密度稀的光掺杂材料的吸收带显示红移。合成了不同烷基取代度的呋喃俘精酸酐，研究了它们的变色量子产率、漂白量子产率和吸收光谱的变化。

项目成果

Y.Yokoyama and T.Shiroyama: "Negative Photochromism of 3,1'-Trimethylene-Bridged 6-Nitroindolyno-spiropyran." Chem.Lett.1995. 71-72 (1995)

Y.Yokoyama 和 T.Shiroyama：“3,1-三亚甲基桥 6-硝基吲哚并螺吡喃的负光致变色现象。”

Y.Yokoyama, K.Sugiyama, S.Yamada, H.Takimoto and Y.Kurita: "Fulgenates. A new Class of Fulgide-Related Thermally Irreversible Photochromic System." Chem.Lett.1994. 749-752 (1994)

Y.Yokoyama、K.Sugiyama、S.Yamada、H.Takimoto 和 Y.Kurita：“Fulgide。一类新的 Fulgide 相关热不可逆光致变色系统。”

F.Matsui, H.Taniguchi, Y.Yokoyama, K.Sugiyama and Y.Kurita: "Application of Photochromic 5-Dimethylaminoindolyl fulgide to Photon-Mode Optical Memory Media with Non-Destructive Readout Ability based on Wavelength Dependence of Bleaching Quantum Yield." Ch

F.Matsui、H.Taniguchi、Y.Yokoyama、K.Sugiyama 和 Y.Kurita：“基于漂白量子产率的波长依赖性，将光致变色 5-二甲氨基吲哚基俘精酸酐应用于具有非破坏性读出能力的光子模式光学存储介质。

S.Kurita et al.: "Inter-Moleculer and Molecular-Matrix Interaction of Photochromic Compound Furylfulgides." Proceedings of Excitonic Process in Condensed Matter. 2362. 434-441 (1994)

S.Kurita 等人：“光致变色化合物呋喃酸酐的分子间和分子-基质相互作用”。

S.Uchida: "Steric Effects of Substituents on Photochromism of Inodlylfulgides." Bull.Chem.Soc.Jpn. (印刷中). (1995)

S.Uchida：“取代基对 Inodlylfulgides 光致变色的空间效应”。Bull.Chem.Soc.Jpn（出版中）。