Reversible Laser-Induced Bending of Pseudorotaxane Crystals

被引：68

作者：

Cheng, Shao-Chi ^{[1
]}

Chen, Kai-Jen ^{[1
]}

Suzaki, Yuji ^{[2
]}

Tsuchido, Yoshitaka ^{[2
]}

Kuo, Ting-Shen ^{[3
]}

Osakada, Kohtaro ^{[2
]}

Horie, Masaki ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Chem Engn, 101,Sec 2,Kuang Fu Rd, Hsinchu 30013, Taiwan

[2] Tokyo Inst Technol, Inst Innovat Res, Lab Chem & Life Sci, Midori Ku, 4259 Nagatsuta, Yokohama, Kanagawa 2268503, Japan

[3] Natl Taiwan Normal Univ, Dept Chem, 88,Sect 4,Tingzhou Rd, Taipei 11677, Taiwan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2018年 / 140卷 / 01期

关键词：

MECHANICALLY INTERLOCKED MOLECULES; AZOBENZENE CRYSTALS; MACHINES; PHOTOIRRADIATION; DRIVEN; MOTION;

D O I：

10.1021/jacs.7b10998

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study investigated the dynamic photo-response of pseudorotaxane crystals with azobenzene and ferrocenyl groups in the axle component. X-ray crystallography showed pseudorotaxanes with a methylazobenzene group and a dibromophenylene ring in the cyclic component to exhibit twisting of the trans-azobenzene groups at torsion angles of 17 degrees and 38 degrees, respectively. Repeated alternating laser irradiation of the crystals at 360 and 445 nm produced bending of 20-30 degrees in opposite directions, with no evidence of decay. Under 44S nm irradiation, bending took place within 0.3 s. A crystal of nonsubstituted pseudorotaxane showed bending of only 2 degrees under 360 nm irradiation due to multiple pi-pi interactions between the planar trans-azobenzene groups. The pseudorotaxane crystals have two chromophores, bent rapidly and reversibly on irradiation at rates depending on the molecular structure.

引用

页码：90 / 93

页数：4

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