4-[Di(biphenyl-4-yl)amino]azobenzene and 4,4′-bis[bis(4′-tert-butylbiphenyl-4-yl)amino]azobenzene as a novel family of photochromic amorphous molecular materials

Shirota, Yasuhiko; Moriwaki, Kazuyuki; Yoshikawa, Satoru; Ujike, Toshiki; Nakano, Hideyuki

doi:10.1039/a806802j

Cited by 75 publications

(44 citation statements)

References 5 publications

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“…Among these, azobenzne-based photochromic amorphous molecular materials were found to exhibit trans-cis photo-isomerization reactions as amorphous films as well as in solutions [15,18]. In addition, several photomechanical effects of azobenzene-based photochromic amorphous molecular materials and crystalline materials caused by photoinduced mass transport have been found [20][21][22][23][24][25][26][27][28][29].…”

Section: Open Accessmentioning

confidence: 99%

“…We have been performing studies of the creation of a low molecular-mass photochromic compound which readily form amorphous glasses, namely "photochromic amorphous molecular materials" [15][16][17][18][19]. Among these, azobenzne-based photochromic amorphous molecular materials were found to exhibit trans-cis photo-isomerization reactions as amorphous films as well as in solutions [15,18].…”

Section: Open Accessmentioning

confidence: 99%

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Photomechanical Bending of Azobenzene-Based Photochromic Molecular Fibers

2013

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Microfibers composed of azobenzene-based photochromic amorphous molecular materials, namely low molecular-mass photochromic materials with a glass-forming property, could be fabricated. These fibers were found to exhibit mechanical bending motion upon irradiation with a laser beam. In addition, the bending direction could be controlled by altering the polarization direction of the irradiated light without changing the position of the light source or the wavelength of the light. In-situ fluorescence observation of mass transport induced at the surface of the fiber doped with CdSe quantum dots suggested that the bending motions were related with the photoinduced mass transport taking place near the irradiated surface of the fiber.

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Section: Open Accessmentioning

confidence: 99%

Section: Open Accessmentioning

confidence: 99%

Photomechanical Bending of Azobenzene-Based Photochromic Molecular Fibers

2013

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“…Although many research focused on the low-molecular-weight AZ-doped polymers, the stability of the induced anisotropy was low. To improve stability of the recorded gratings, molecular glasses fabricated with low-molecular-weight AZ compounds were developed (Shirota et al, 1998). This kind of materials can form stable amorphous and homogenous films without scattering of visible light (Nakano et al, 2002).…”

Section: Low-molecular-weight Azsmentioning

confidence: 99%

Azobenzene-Containing Materials for Hologram

Yu¹,

Kobayashi²

2011

Holograms - Recording Materials and Applications

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“…Bulky ring substituents can be used to hinder the thermal back reaction. For instance, a polyurethane main-chain azo exhibited a lifetime of 4 days (thermal rate constant of k=2.8 Â 10 À6 s À1 , at 31C) (Lamarre and Sung, 1983), and an azobenzene parasubstituted with bulky pendants had a lifetime of 60 days (ko2 Â 10 À7 s À1 , at room temperature) (Shirota et al, 1998). The conformational strain of macrocylic azo compounds can also be used to lock the cis state, where lifetimes of 20 days (k=5.9 Â 10 À7 s À1 ) (Norikane et al, 2003), 1 year (half-life 400 days, k=2 Â 10 À8 s À1 ) (Rottger and Rau, 1996;Rau and Roettger, 1994), or even 6 years (k=4.9 Â 10 À9 s À1 ) (Nagamani et al, 2005) were observed.…”

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confidence: 99%