2160-62-5Relevant articles and documents
Rational Design of Azothiophenes—Substitution Effects on the Switching Properties
Heindl, Andreas H.,Wegner, Hermann A.
, p. 13730 - 13737 (2020)
A series of substituted azothiophenes was prepared and investigated toward their isomerization behavior. Compared to azobenzene (AB), the presented compounds showed red-shifted absorption and almost quantitative photoisomerization to their (Z) states. Furthermore, it was found that electron-withdrawing substitution on the phenyl moiety increases, while electron-donating substitution decreases the thermal half-lives of the (Z)-isomers due to higher or lower stabilization by a lone pair–π interaction. Additionally, computational analysis of the isomerization revealed that a pure singlet state transition state is unlikely in azothiophenes. A pathway via intersystem crossing to a triplet energy surface of lower energy than the singlet surface provided a better fit with experimental data of the (Z)→(E) isomerization. The insights gained in this study provide the necessary guidelines to design effective thiophenylazo-photoswitches for applications in photopharmacology, material sciences, or solar energy harvesting applications.
Near-infrared organic fluorescent material, preparation method and application thereof
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Paragraph 0058; 0059, (2018/10/19)
The invention discloses a 2-bis(5-(4-(diphenylamino)phenyl)thiophene-2-yl)dicyanoethylene near-infrared organic fluorescent material, a preparation method and application thereof, and belongs to the technical field of organic photoelectric materials. A trans-thienyl butadiene cyanide derivative is formed by introducing a thiophene group and a triphenylamine group on the basis of a novel trans- butadiene cyanide group; due to special properties of the thiophene group, band gap level and steric configuration of a compound can be regulated, the compound has larger T1 and T2 energy level difference and smaller delta EST on high energy level, a delayed effect is reduced, the utilization rate of excitons is increased, and the luminous efficiency is remarkably increased; the compound has very good thermal stability and very good chemical stability, an organic electroluminescence device prepared as a luminous layer has the characteristics of lower driving voltage, higher current efficiency, higher external quantum efficiency and the like, and very good electroluminescent performance is obtained.
ARYL PIPERIDINE DERIVATIVES AS INDUCERS OF LDL-RECEPTOR EXPRESSION FOR THE TREATMENT OF HYPERCHOLESTEROLEMIA
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Page/Page column 53, (2008/06/13)
This invention relates to novel compounds which up-regulate LDL receptor (LDL-r) expression and to processes for their preparation, pharmaceutical compositions containing them and their medical use. More particularly, this invention relates to novel aromatic piperidines of formula (I) and their use in therapy.
