Photoinduced Motions in Azo-Containing Polymers

Photoinduced reorientation and polarization holography in a new photopolymer with 4-methoxy-N-benzylideneaniline side groups

“…1 To date, photoinduced molecular reorientation with a large optical anisotropy has been attained using many types of photosensitive materials, including polymeric and monomeric materials comprised of axis-selectively photoreactive moieties. [2][3][4][5][6][7] Among these materials, azobenzene-containing materials have been extensively studied due to their applicability to information storage and birefringent optical devises. [1][2][3][4][5][6] In the photoinduced reorientation, the azobenzene molecules reorient according to the polarization state of the light beams based on axisselective trans-cis-trans photoisomerization.…”

“…[2][3][4][5][6][7] Among these materials, azobenzene-containing materials have been extensively studied due to their applicability to information storage and birefringent optical devises. [1][2][3][4][5][6] In the photoinduced reorientation, the azobenzene molecules reorient according to the polarization state of the light beams based on axisselective trans-cis-trans photoisomerization. Additionally, holographic exposure often results in surface relief (SR) formation due to the periodic photoisomerization of the azobenzene molecules with varying degrees of photoreaction as well as the polarization conditions of the exposure light beam.…”

Effect of molecular architectures in photoinduced birefringence in films of azo-modified diblock copolymers

“…This behavior could be attributed to the chemical nature of the bisazobenzene. Natansohn and Rochon reported [29] that the writing speed is related to the polarity of azobenzene, with shorter times being obtained for increasingly polar azobenzene groups. In our case, the bisazobenzene is not too polar and this could be the cause of the longer times required to achieve the maximum birefringence.…”

Absolute asymmetric electrochemical polymerization

“…Control of both chirality of azobenzene liquid crystalline polymers with CPL and photo-induced chirality with CPL for amorphous azobenzene polymer films has been achieved [14][15][16][17][18]. Chirality induction for polyfluorene derivatives having no photochromic groups in thin film form upon irradiation of CPL was reported [19].…”