Supramolecular bisazopolymers exhibiting enhanced photoinduced birefringence and enhanced stability of birefringence for four-dimensional optical recording

• DOI: 10.1039/c000073f
• Publication Date: 2010-05-26T09:30:19Z
• Authors: Si Wu; Shiyuan Duan; Zhangyuan Lei; Wei Su; Zhoushun Zhang; Keyi Wang; Qijin Zhang
• Keywords: Azobenzene; Acceptor; Optical storage

Extremely stable, high-density information storage media were prepared by the connection of two azobenzene groups via hydrogen bonding to form supramolecular bisazopolymers. The bisazopolymers contain 4-((4-hydroxyphenyl)diazenyl)benzonitrile (AzoCN) as a donor and poly(6-(4-(pyridin-4-yldiazenyl)phenoxy)hexyl methacrylate) (pAzopy) acceptor. High quality films pAzopy/(AzoCN)x (x = 0.25, 0.5, 0.75, 1.0) with different molar ratios donor/acceptor spin-casting. spontaneously lamellar structures periodic thickness 7.1 nm. These samples exhibit optically induced birefringence. birefringence proportion remnant increase from 0.0265 0.1 50.5% 108%, respectively, content AzoCN in increases, which indicates larger enhances both its stability. We also use an azopolymer without pyridine (pAzoCH3) do control experiment, shows that pAzoCH3/(AzoCN)1.0 not show significant enhanced enhancements are because unique structure A new laser direct writing system has been developed for optical recording on azopolymers. pAzopy/(AzoCN)1.0 film is significantly better at image than pAzopy film, recorded images very clear after four months whereas one disappear just day. Four-dimensional achieved integrating polarization intensity dimensions plane. An density about 0.93 Gbit cm−2 could be 20 times normal DVD.