Photoinduced formation of the laser dye coumarin 6 from its dihydro derivatives
作者:Valerii F. Traven、Dmitrii A. Cheptsov、Natalya P. Solovjova、Tatjana A. Chibisova、Ilya I. Voronov、Sergei M. Dolotov、Ivan V. Ivanov
DOI:10.1016/j.dyepig.2017.07.001
日期:2017.11
The dihydro form of the laser dye Coumarin 6 and its acylated derivatives undergo photoinduced transformations with Coumarin 6 formation. The reactions go easily both in organic solvents and in polymer films with a high increase of fluorescence. Irreversibility of the reaction provides potential use of the new photosensitive media for optical information recording and sensing technologies.
we develop a new design strategy of LDs-targeted probe based on the solvatochromism of coumarin derivatives. The results revealed that the emission wavelength of coumarin fluorophores gradually red shift in different solvents with increasing polarity, while absorption wavelength almost unchanged. As a result, the enlarged stokes shift of coumarin was emerged from oil to water. Furthermore, properly reducing
An organic light-emitting device comprises: a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, the organic layer comprising an emission layer, wherein the organic layer comprises a first compound represented by Formula 1 and a second compound represented by Formula 2, wherein a case where the first compound is 4,4'-bis(N-carbazolyl)-1,1'-biphenyl(CBP) is excluded:
An organic light-emitting device including a first electrode; a second electrode; emission units stacked between the first electrode and the second electrode and including at least one emission layer; and charge generation layers between two adjacent emission units, the charge generation layers each including an n-type charge generation layer and p-type charge generation layer, a maximum emission wavelength of light emitted by at least one of the emission units is different from that of another emission unit, one n-type charge generation layer includes a first compound and a metal-containing material, the first compound being represented by Formula 1, the p-type charge generation layers include an amino group-free compound, at least one of the emission units further includes a hole transporting (HT)-emission auxiliary layer on a first electrode side thereof, and the HT-emission auxiliary layer includes at least one second compound, the second compound being represented by Formula 2:
一种有机发光器件,包括第一电极;第二电极;堆叠在第一电极和第二电极之间并包括至少一个发射层的发射单元;相邻两个发射单元之间的电荷发生层,电荷发生层各包括一个 n 型电荷发生层和一个 p 型电荷发生层,至少一个发射单元发出的光的最大发射波长不同于另一个发射单元,其中一个 n 型电荷发生层包括一个第一化合物和一个含金属材料、第一化合物由式 1 表示,p 型电荷发生层包括不含氨基的化合物,至少一个发射单元进一步包括位于其第一电极侧的空穴传输(HT)发射辅助层,HT-发射辅助层包括至少一种第二化合物,第二化合物由式 2 表示:
Coumarin-Benzothiazoline Conjugate as a Fluorescence Turn-On Probe for Reactive Oxygen Species and its Cellular Expression
作者:Dong-Nam Lee、Do-Yeon Kim、Sung-Ho Ghil、Hae-Jo Kim