The first examples of achiral bent-core molecules consisting of an azo linkage and five aromatic rings exhibiting bent-core mesophases are reported. They exhibit B1 and B2 phases as identified by optical microscopy, differential scanning calorimetry, X-ray diffraction, and electro-optical techniques. The B2 phase of these materials is identified to be the anticlinicâantiferroelectric, SmCAPA phase. The mesophases of these compounds have relatively low transition temperatures and wide temperature ranges. The observation of bent-core phases in azo compounds assumes significance from the fact that the introduction of the âNNâ linkage adds a new dimension, namely photochromism, to this field.
Self-Assembled Monolayers Derived from Calix[4]resorcinarenes Exhibiting Excellent Desorption-Resistance and Their Applicability to Surface Energy Photocontrol
作者:Sang-Keun Oh、Masaru Nakagawa、Kunihiro Ichimura
DOI:10.1246/cl.1999.349
日期:1999.4
Self-assembled monolayers exhibiting excellent desorption-resistance was readily available by the adsorption of crown conformers of O-carboxymethylated calix[4]resorcinarenes on aminated silica substrates through multi-point adsorption.
An optically transparent matrix including a molecule containing a hydroxyazobenzene group or its derivative embedded in the matrix. An optical system including the optically transparent matrix, an isomerizing light source, and means for measuring absorbance changes from the optically transparent matrix. A method for measuring the quantity of hydrogen bonding gaseous molecules.
Photo-induced Ionic Conductivity Switching in Polymer/Photochromic Liquid Crystal Composite Films Containing Lithium/Crown Ether Complex
作者:Keiichi Kimura、Tatsuya Suzuki、Masaaki Yokoyama
DOI:10.1246/cl.1989.227
日期:1989.2
Thin compositefilms consisting of poly(vinyl chloride), azobenzeneliquidcrystal, lithium ion/12-crown-4 complex exhibited reversible photo-induced switching of ionicconductivity based on the photochromic phase transition of the azobenzene derivative. The ionicconductivities increased by more than two orders of magnitude by UV light and then reverted to the initial state by visible light at ambient
Optical sensor for hydrogen bonding gaseous molecules
申请人:Tampere University Foundation sr
公开号:US11391675B2
公开(公告)日:2022-07-19
An optically transparent matrix including a molecule containing a hydroxyazobenzene group or its derivative embedded in the matrix. An optical system including the optically transparent matrix, an isomerizing light source, and one or more light detector(s) for measuring absorbance changes from the optically transparent matrix. A method for measuring the quantity of hydrogen bonding gaseous molecules.