Control of the Orientation and Photoinduced Phase Transitions of Macrocyclic Azobenzene

被引：62

作者：

Uchida, Emi ^{[1
]}

Sakaki, Kouji ^{[2
]}

Nakamura, Yumiko ^{[2
]}

Azumi, Reiko ^{[1
]}

Hirai, Yuki ^{[3
]}

Akiyama, Haruhisa ^{[3
]}

Yoshida, Masaru ^{[3
]}

Norikane, Yasuo ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Elect & Photon Res Inst, Tsukuba, Ibaraki 3058565, Japan

[2] Natl Inst Adv Ind Sci & Technol, Energy Technol Res Inst, Tsukuba, Ibaraki 3058565, Japan

[3] Natl Inst Adv Ind Sci & Technol, Nanosyst Res Inst, Tsukuba, Ibaraki 3058565, Japan

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2013年 / 19卷 / 51期

关键词：

crystal growth; isomerization; phase transitions; photochemistry; photochromism; self-assembly; CIS-TRANS ISOMERIZATION; THERMAL-ISOMERIZATION; CRYSTAL-STRUCTURE; AZO POLYMERS; PHOTOISOMERIZATION; INVERSION; MOTION; PHOTOCHEMISTRY; PHOTOMECHANICS; SURFACES;

D O I：

10.1002/chem.201302674

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Photoinduced phase transitions caused by photochromic reactions bring about a change in the state of matter at constant temperature. Herein, we report the photoinduced phase transitions of crystals of a photoresponsive macrocyclic compound bearing two azobenzene groups (1) at room temperature on irradiation with UV (365nm) and visible (436nm) light. The trans/trans isomer undergoes photoinduced phase transitions (crystal-isotropic phase-crystal) on UV light irradiation. The photochemically generated crystal exhibited reversible phase transitions between the crystal and the mesophase on UV and visible light irradiation. The molecular order of the randomly oriented crystals could be increased by irradiating with linearly polarized visible light, and the value of the order parameter was determined to be -0.84. Heating enhances the thermal cis-to-trans isomerization and subsequent cooling returned crystals of the trans/trans isomer.

引用

页码：17391 / 17397

页数：7