Photochemically Reversible Liquefaction and Solidification of Single Compounds Based on a Sugar Alcohol Scaffold with Multi Azo‐Arms

Sugar alcohol derivatives with multi azobenzene arms are photochemically and isothermally liquefied from a powdered solid upon irradiation with ultraviolet light at room temperature, and then solidified on irradiation with visible light, where the transition between solid and liquid are reversible. These compounds possess similar chemical structures to comb-like liquid crystalline oligomers.

[1]  T. Seki,et al.  Features of Photomechanical Response in Monolayers Composed of a Charged Amphiphilic Azobenzene Polymer , 1996 .

[2]  K. Ichimura Reversible photoisomerisability and particle size changes of mill-dispersed azobenzene crystals in water. , 2009, Chemical communications.

[3]  Takashi Kato,et al.  Photoresponsive Anisotropic Soft Solids: Liquid‐Crystalline Physical Gels Based on a Chiral Photochromic Gelator , 2003 .

[4]  N. Tamaoki,et al.  Reflection colour changes in cholesteric liquid crystals after the addition and photochemical isomerization of mesogenic azobenzenes tethered to sugar alcohols , 2009 .

[5]  H. Koshima,et al.  Mechanical motion of azobenzene crystals upon photoirradiation. , 2009, Journal of the American Chemical Society.

[6]  Y. Norikane,et al.  Photoinduced isothermal phase transitions of liquid-crystalline macrocyclic azobenzenes. , 2011, Chemical communications.

[7]  Takashi Komori,et al.  Thermal and Light Control of the Sol-Gel Phase Transition in Cholesterol-Based Organic Gels. Novel Helical Aggregation Modes As Detected by Circular Dichroism and Electron Microscopic Observation , 1994 .

[8]  H. Sakai,et al.  Assembly and Photoinduced Organization of Mono‐ and Oligopeptide Molecules Containing an Azobenzene Moiety , 2007 .

[9]  J. Etxebarria,et al.  Photoisomerizable metallomesogens and soft crystals based on orthopalladated complexes. , 2010, Inorganic chemistry.

[10]  S. Kim,et al.  Rapid and reversible gel-sol transition of self-assembled gels induced by photoisomerization of dendritic azobenzenes. , 2009, Langmuir : the ACS journal of surfaces and colloids.

[11]  A. Fujishima,et al.  Photo-Induced Structural Transformation on the Surface of Azobenzene Crystals , 1997 .

[12]  Kunihiro Ichimura,et al.  Photoalignment of Liquid-Crystal Systems. , 2000, Chemical reviews.

[13]  Natalia Boiko,et al.  Photoactive liquid crystalline polymer systems with light-controllable structure and optical properties , 2003 .

[14]  Tomiki Ikeda,et al.  Photomodulation of liquid crystal orientations for photonic applications , 2003 .

[15]  N. Tamaoki,et al.  Photocontrolled gel-to-sol-to-gel phase transitioning of meta-substituted azobenzene bisurethanes through the breaking and reforming of hydrogen bonds. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[16]  K. Ichimura Photoisomerisation behaviour of azobenzene crystals hybridised with silica nanoparticles by dry grinding. , 2010, Chemical communications.

[17]  Paul Rochon,et al.  Photoinduced motions in azo-containing polymers. , 2002, Chemical reviews.

[18]  Tomiki Ikeda,et al.  Optical Switching and Image Storage by Means of Azobenzene Liquid-Crystal Films , 1995, Science.

[19]  T. Ikeda,et al.  Amplified Image Recording in Liquid Crystal Media by Means of Photochemically Triggered Phase Transition , 1987 .

[20]  Paul Rochon,et al.  Recent Developments in Aromatic Azo Polymers Research , 1993 .