Synthesis and Properties of Perylene-Bridge-Anchor Chromophoric Compounds
作者:Ryan Harmer、Hao Fan、Katherine Lloyd、Samantha Doble、Joseph Avenoso、Han Yan、Luis G. C. Rego、Lars Gundlach、Elena Galoppini
DOI:10.1021/acs.jpca.0c04609
日期:2020.8.6
perylene’s advantageous electronic and optical properties. Nonetheless, the ability to fully exploit synthetically the substitution pattern of perylene with linker (= bridge-anchor) units remains little explored. Here we developed 2,5-di-tert-butylperylene (DtBuPe)-bridge-anchor compounds with t-Bu group substituents to prevent π-stacking and one or two linkerunits in both the peri and ortho positions, by
作者:Ying-Xin Ma、Guo-Qing Wei、Song Chen、Hong-Tao Lin、Xue-Dong Wang
DOI:10.1039/d1cc04675f
日期:——
We modulated the optical properties of cocrystals without changing the unit cell parameters and crystal morphology by simply changing the relative position of the cyan group on the electron acceptor molecule.
The photophysical properties of chromophores at high (100 mM and above) concentrations in polymers and as neat solids
作者:Rabih O. Al-Kaysi、Tai Sang Ahn、Astrid M. Müller、Christopher J. Bardeen
DOI:10.1039/b605925b
日期:——
The absorption, fluorescence, and photostability of five conjugated chromophores: perylene, 2,5,8,11-tetra-t-butyl perylene (TTBP), perylene orange (PO), perylene red (PR), and a zwitterionic Meisenheimercomplex (MHC), are studied as a function of concentration in poly(methyl methacrylate) (PMMA). At 1 mM concentrations, all five molecules exhibit properties consistent with unaggregated chromophores
Tailoring Colors by O Annulation of Polycyclic Aromatic Hydrocarbons
作者:Tanja Miletić、Andrea Fermi、Ioannis Orfanos、Aggelos Avramopoulos、Federica De Leo、Nicola Demitri、Giacomo Bergamini、Paola Ceroni、Manthos G. Papadopoulos、Stelios Couris、Davide Bonifazi
DOI:10.1002/chem.201604866
日期:2017.2.16
have exceptionally high emission yields and tunable absorptionproperties throughout the UV/Vis spectral region. Electrochemical investigations showed that in all cases O annulation increases the electron‐donor capabilities by raising the HOMO energy level, whereas the LUMO energy level is less affected. Moreover, third‐order nonlinear optical (NLO) measurements on solutions or thin films containing
已经实现了氧掺杂多芳烃的合成,其中两个多环芳烃亚单元通过一个或两个氧原子桥接。这包括高产闭环关键步骤,根据反应条件,通过分子内 C-O 键形成呋喃基或吡喃吡喃基键。溶液中的综合光物理测量表明,这些化合物在整个紫外/可见光谱区域具有极高的发射产率和可调吸收特性。电化学研究表明,在所有情况下,O 成环通过提高 HOMO 能级来增加电子供体能力,而 LUMO 能级受到的影响较小。此外,对含有染料的溶液或薄膜进行的三阶非线性光学(NLO)测量显示出非常好的第二超极化率值。重要的是,与非线性和非线性光学折射相比,含有吡喃吡喃基衍生物的聚甲基丙烯酸甲酯薄膜分别表现出较弱的线性吸收和非线性光学吸收,从而表明它们是用于光子器件的特殊有机材料。
Method for Driving Light-Emitting Element and Method for Driving Light-Emitting Device
申请人:Aoyama Tomoya
公开号:US20120146521A1
公开(公告)日:2012-06-14
A method for driving a light-emitting element is provided with two steps: a first step of performing constant current drive; and a second step of increasing the absolute value of a voltage with time. It is assumed that a short circuit between a pair of electrodes occurs when a voltage which is applied to the light-emitting element is lower than or equal to the emission start voltage. A shift from the first step to the second step occurs when this condition is satisfied. Accordingly, a high current can be passed through a short-circuited portion between the pair of electrodes in the second step. The portion is insulated by heat (a short circuit between a pair of electrodes can be repaired), so that deterioration in the light-emitting element can be suppressed, and luminance of the light-emitting element can be recovered.