1251554-12-7Relevant articles and documents
Liquid crystal behavior and luminescence properties of (2Z,2′Z)-2,2′-(1,4-phenylene)bis(3-(4-(N-alkoxy) phenyl)acrylonitrile
Li, Zhiyuan,Zhou, Mengyi,Yin, Zhiping,Xia, Guo,Zhang, Guobing,Xu, Miao,Qiu, Longzhen,Lu, Hongbo
, p. 1 - 11 (2018)
Luminescent liquid crystals (LLCs) have attracted significant interest in organic optoelectronic applications owing to their ordered alignment and luminescence properties. In this study, a series of dicyanodistyrylbenzene-based calamitic molecules, (2Z,2′
Multistimuli two-color luminescence switching via different slip-stacking of highly fluorescent molecular sheets
Yoon, Seong-Jun,Chung, Jong Won,Gierschner, Johannes,Kim, Kil Suk,Choi, Moon-Gun,Kim, Dongho,Park, Soo Young
, p. 13675 - 13683 (2010)
Color tuning and switching of the solid-state luminescence of organic materials are attractive subjects for both the fundamental research and practical applications such as optical recording. We report herein cyanostilbene-based highly luminescent molecular sheets which exhibit two-color fluorescence switching in response to pressure, temperature, and solvent vapor. The origin for the multistimuli luminescence switching is the two-directional shear-sliding capability of molecular sheets, which are formed via intermolecular multiple C-H...N and C-H...O hydrogen bonds. The resulting two distinctive crystal phases are promoted by different modes of local dipole coupling, which cause a substantial alternation of π-π overlap. These changes can be directly correlated with the subsequent intermolecular excitonic and excimeric coupling in both phases, as demonstrated by an in-depth theory-assisted spectroscopic and structural study. Finally, we have prepared a first device demonstrator for rewritable fluorescent optical recording media which showed multistimuli luminescence tuning with fast response. Our multistimuli responsive system is unique in terms of the slip-stacking of molecular sheets and thus provides a novel concept of rewritable fluorescent optical recording media.
Multiresponsive luminescent dicyanodistyrylbenzenes and their photochemistry in solution and in bulk
Martínez-Abadía,Varghese,Giménez,Ros
, p. 2886 - 2893 (2016/04/26)
Multiresponsive luminescent materials with dicyanodistyrylbenzene chromophores incorporated into bent-core and rod-like molecules have been prepared and characterized. Rod-like compounds exhibit nematic or smectic liquid crystal phases, whereas bent-core compounds melt directly to the isotropic liquid at high temperatures. Fluorescence properties are very sensitive to external stimuli such as heat, light, pressure and solvent vapors. All compounds undergo Z/E photoisomerization in solution under UV irradiation. In addition, photochemical activity in bulk has been investigated. Whereas the crystal phases are stable under UV irradiation, the liquid crystal phases are unstable giving rise to Z/E photoisomerization and [2+2]-photocycloaddition products. As a consequence, photoinduced phase changes are observed. This study shows the versatilty of dicyanodistyrylbenzene-based liquid crystals as novel types of photoreactive materials.
In situ synthesis of stimulus-responsive luminescent organic materials using a reactive inkjet printing approach
Jeon, Seongho,Lee, Jong Pil,Kim, Jong-Man
supporting information, p. 2732 - 2736 (2015/03/30)
We have prepared luminescent organic materials using a reactive inkjet printing system. A stimulus (vapour/heat)-responsive fluorescent dye as well as a luminescent conjugated polymer were readily generated by printing of an aldehyde, a phenylenediacetoni