27 Crawling and Bending Motions of Azobenzene Derivatives …
477
The photomechanical bending motion of polymer films attracts much attention
because of its potential application to actuators and sensors. There have been many
publications about this field; however, most of research clings on to similar molecular
design. In this context, our finding of novel molecular design provides a deeper
insight into the photomechanical LC polymers utilizing the photoisomerization of
azobenzene.
Throughout our research, the motion of photoresponsive molecules is amplified
to the visible phenomena such as phase change, translational motion, and bending
motion. Rational molecular design made it possible to induce the molecules to move
synergetically and the whole system working.
Acknowledgements We deeply appreciate to Dr. E. Uchida for her collaboration. The present
work was supported by JSPS KAKENHI Grant Number 17H05275 in Scientific Research on Innovative Areas “Photosynergetics” and by JSPS KAKENHI Grant Numbers 16K14069, 16H04141,
18H05986, and JP18K14291.
References
1. Gao D, Ding W, Nieto-Vesperinas M, Ding X, Rahman M, Zhang T, Lim CT, Qiu CW
(2017) Optical manipulation from the microscale to the nanoscale: Fundamentals, advances
and prospects. Light Sci Appl 6:e17039. https://doi.org/10.1038/lsa.2017.39
2. Xu L, Mou F, Gong H, Luo M, Guan J (2017) Light-driven micro/nanomotors: from
fundamentals to applications. Chem Soc Rev 46:6905–6926. https://doi.org/10.1039/c7cs00
516d
3. Bandara HMD, Burdette SC (2012) Photoisomerization in different classes of azobenzene.
Chem Soc Rev 41:1809–1825. https://doi.org/10.1039/c1cs15179g
4. Seki T (2018) A wide array of photoinduced motions in molecular and macromolecular
assemblies at interfaces. Bull Chem Soc Jpn 91:1026–1057. https://doi.org/10.1246/bcsj.201
80076
5. Seki T (2016) Light-directed alignment, surface morphing and related processes: recent trends.
J Mater Chem C 4:7895–7910. https://doi.org/10.1039/c6tc02482c
6. Tsuda M, Kuratani K (1964) Isomerization of cis-azobenzene in the solid phase. Bull Chem
Soc Jpn 37:1284–1288
7. Norikane Y, Hirai Y, Yoshida M (2011) Photoinduced isothermal phase transitions of liquidcrystalline macrocyclic azobenzenes. Chem Commun 47:1770–1772. https://doi.org/10.1039/
c0cc04052e
8. Uchida E, Sakaki K, Nakamura Y, Azumi R, Hirai Y, Akiyama H, Yoshida M, Norikane
Y (2013) Control of the orientation and photoinduced phase transitions of macrocyclic
azobenzene. Chem A Eur J 19:17391–17397. https://doi.org/10.1002/chem.201302674
9. Hoshino M, Uchida E, Norikane Y, Azumi R, Nozawa S, Tomita A, Sato T, Adachi S, Koshihara
S (2014) Crystal melting by light: X-ray crystal structure analysis of an azo crystal showing
photoinduced crystal-melt transition. J Am Chem Soc 136:9158–9164. https://doi.org/10.1021/
ja503652c
10. Norikane Y, Uchida E, Tanaka S, Fujiwara K, Koyama E, Azumi R, Akiyama H, Kihara H,
Yoshida M (2014) Photoinduced crystal-to-liquid phase transitions of azobenzene derivatives
and their application in photolithography processes through a solid–liquid patterning. Org Lett
16:5012–5015. https://doi.org/10.1021/ol502223u
477
The photomechanical bending motion of polymer films attracts much attention
because of its potential application to actuators and sensors. There have been many
publications about this field; however, most of research clings on to similar molecular
design. In this context, our finding of novel molecular design provides a deeper
insight into the photomechanical LC polymers utilizing the photoisomerization of
azobenzene.
Throughout our research, the motion of photoresponsive molecules is amplified
to the visible phenomena such as phase change, translational motion, and bending
motion. Rational molecular design made it possible to induce the molecules to move
synergetically and the whole system working.
Acknowledgements We deeply appreciate to Dr. E. Uchida for her collaboration. The present
work was supported by JSPS KAKENHI Grant Number 17H05275 in Scientific Research on Innovative Areas “Photosynergetics” and by JSPS KAKENHI Grant Numbers 16K14069, 16H04141,
18H05986, and JP18K14291.
References
1. Gao D, Ding W, Nieto-Vesperinas M, Ding X, Rahman M, Zhang T, Lim CT, Qiu CW
(2017) Optical manipulation from the microscale to the nanoscale: Fundamentals, advances
and prospects. Light Sci Appl 6:e17039. https://doi.org/10.1038/lsa.2017.39
2. Xu L, Mou F, Gong H, Luo M, Guan J (2017) Light-driven micro/nanomotors: from
fundamentals to applications. Chem Soc Rev 46:6905–6926. https://doi.org/10.1039/c7cs00
516d
3. Bandara HMD, Burdette SC (2012) Photoisomerization in different classes of azobenzene.
Chem Soc Rev 41:1809–1825. https://doi.org/10.1039/c1cs15179g
4. Seki T (2018) A wide array of photoinduced motions in molecular and macromolecular
assemblies at interfaces. Bull Chem Soc Jpn 91:1026–1057. https://doi.org/10.1246/bcsj.201
80076
5. Seki T (2016) Light-directed alignment, surface morphing and related processes: recent trends.
J Mater Chem C 4:7895–7910. https://doi.org/10.1039/c6tc02482c
6. Tsuda M, Kuratani K (1964) Isomerization of cis-azobenzene in the solid phase. Bull Chem
Soc Jpn 37:1284–1288
7. Norikane Y, Hirai Y, Yoshida M (2011) Photoinduced isothermal phase transitions of liquidcrystalline macrocyclic azobenzenes. Chem Commun 47:1770–1772. https://doi.org/10.1039/
c0cc04052e
8. Uchida E, Sakaki K, Nakamura Y, Azumi R, Hirai Y, Akiyama H, Yoshida M, Norikane
Y (2013) Control of the orientation and photoinduced phase transitions of macrocyclic
azobenzene. Chem A Eur J 19:17391–17397. https://doi.org/10.1002/chem.201302674
9. Hoshino M, Uchida E, Norikane Y, Azumi R, Nozawa S, Tomita A, Sato T, Adachi S, Koshihara
S (2014) Crystal melting by light: X-ray crystal structure analysis of an azo crystal showing
photoinduced crystal-melt transition. J Am Chem Soc 136:9158–9164. https://doi.org/10.1021/
ja503652c
10. Norikane Y, Uchida E, Tanaka S, Fujiwara K, Koyama E, Azumi R, Akiyama H, Kihara H,
Yoshida M (2014) Photoinduced crystal-to-liquid phase transitions of azobenzene derivatives
and their application in photolithography processes through a solid–liquid patterning. Org Lett
16:5012–5015. https://doi.org/10.1021/ol502223u