Deep-blue fluorophores with imidazoacridine acceptors: enhancing photostability and two-photon fluorescence using structural constraint
作者:Ethan R. Sauvé、Christopher M. Tonge、Zachary M. Hudson
DOI:10.1039/d0tc05241h
日期:——
after for applications in both electronics and bioimaging. Development of such materials has been progressing rapidly, yet fluorophores with high photostability emitting in this region remain uncommon. Herein we report the synthesis of three donor–acceptor dyes based on benzimidazole acceptors and triphenylamine donors. These materials have deep blue emission, CIE(x, y) < (0.17, 0.09), quantum yields
Bridged-triarylamine starburst oligomers as hole transporting materials for electroluminescent devices
作者:Zhen Fang、Vijila Chellappan、Richard D. Webster、Lin Ke、Tianfu Zhang、Bin Liu、Yee-Hing Lai
DOI:10.1039/c2jm32840b
日期:——
Two bridged-triphenylamine starburst molecules were designed and synthesized. Their electrochemical properties were studied in detail using cyclic voltammetry (CV) and square wave voltammetry (SWV) methods. The bridged molecular structure stabilizes the oxidative state and decreases the oxidation potentials, resulting in an increased HOMO energy level. Double-layer sandwich electroluminescence devices were fabricated. The bridged triphenylamine starburst 4 has shown significantly enhanced performance compared with the triphenylamine analog 3 and its ethenyl-linked derivative 6.
Photoelectric conversion material, film containing the material, photoelectric conversion device, method for preparing photoelectric conversion device, method for using photoelectric conversion device, photosensor and imaging device
申请人:FUJIFILM CORPORATION
公开号:US09349965B2
公开(公告)日:2016-05-24
There is provided a compound represented by a specific formula, which has an absorption maximum at 400 nm or more and less than 720 nm in a UV-visible absorption spectrum, wherein a molar extinction coefficient is 10,000 mol−1·l·cm−1 or more at the absorption maximum wavelength, and a difference between a melting point and a deposition temperature (a melting point−a deposition temperature) is 31° C. or more.
Donor–acceptor materials exhibiting deep blue emission and thermally activated delayed fluorescence with tris(triazolo)triazine
作者:Ryoga Hojo、Don M. Mayder、Zachary M. Hudson
DOI:10.1039/d1tc03480d
日期:——
photoluminescence quantum yield (PLQY) of 0.94 in toluene. In addition, the locked-planarity of the hexamethylazatriangulene (HMAT) donors induced the highest two-photon cross-section σ2 of 2928 GM, while the material also exhibited 2.9-fold enhancement in photostability compared to non-planarized triarylamines. In contrast, TTT-3TTAC undergoes thermally activated delayed fluorescence (TADF), attributed to the strongly
制备了五种基于三(三唑并)三嗪(TTT)受体的发光供体-受体化合物。在一系列发射器中,TTT-3HMAT表现出深蓝色发射,CIE( x , y ) < (0.16, 0.05) 和在甲苯中的光致发光量子产率 (PLQY) 为 0.94。此外,hexamethylazatriangulene的锁定平面性(HMAT)供体诱导的最高双光子截面σ 2 2928 GM的,同时还材料在耐光性与非平坦化三芳基胺显示出2.9倍的增强。相比之下,TTT-3TTAC经历热激活延迟荧光 (TADF),这归因于TTT-3TTAC的强烈捐赠和高度扭曲的性质N 3, N 3, N 6, N 6- tetra - p - tolyl -9 H - carbazole -3,6-diamine( TTAC )供体。总体而言,这项工作揭示了基于 TTT 的染料用于双光子成像的潜力,同时进一步揭示了将基于 TTT 的发射器设计为