Synthesis and electro-optical properties of spiro-bifluorenylvinylene-based polymers for light-emitting diodes applications
摘要:
五种新的热稳定电致发光芳香烯-乙烯共轭聚合物被合成,包括聚[3′,6′-双(3,7-二甲基辛氧基)-9,9′-螺二苯并荧光酮-2,7-乙烯基] [(OC10)2-Spiro-PFV] 和聚[{3′,6′-双(3,7-二甲基辛氧基)-9,9′-螺二苯并荧光酮-2,7-乙烯基}-共-2-{甲氧基-5-(2-乙基己氧基)-1,4-苯乙烯}] [(OC10)2-Spiro-PFV-co-MEH-PPV]。这些聚合物被用于制造高效的发光二极管(LED)。聚合物的玻璃转变温度高于PPVs和PFs,范围在170至222°C之间。含有新聚合物的ITO/PEDOT/聚合物/LiF/铝LED的发射颜色根据共聚物组成的不同,从蓝色(467 nm)到黄色(587 nm)变化。这些LED的最大亮度和光效分别可达到4062 cd m−2和1.79 cd A−1。
Palladium Catalyzed C–I and Vicinal C–H Dual Activation of Diaryliodonium Salts for Diarylations: Synthesis of Triphenylenes
作者:Xunshen Wu、Jianwei Han、Limin Wang
DOI:10.1021/acs.joc.7b01905
日期:2018.1.5
we report an approach for direct diarylations of 2-bromobiphenyls or bromobenzenes. As a result, a wide range of triphenylenes with various substituents have been synthesized in good yields. These triphenylenes are expected to be employed in the “bottom-up” synthesis of functional aromatic molecules in material science.
Four tribenzopentaphene (TBP) derivatives containing different alkoxy side chains have been synthesized and shown to self-assemble into different microobjects such as microspheres, microfibers and microribbons. Photovoltaic cells of 1b blended with PDI or PC61BM are fabricated and preliminary results show good efficiencies comparable to those of previously reported photovoltaic devices of hexabenzocoronenes.
composed of template nanofibers, assembled from an electron acceptor molecule, perylene tetracarboxylic diimide (PTCDI), onto which (through drop-casting) various electron donor molecules (D1-D4) were coated. The donor molecules have the same π-conjugated core, but different side groups. Due to the different side groups, the four donor molecules showed distinctly different propensity for intermolecular aggregation
Butterfly‐shaped methylene‐bridged bitriphenylenes are synthesized by Scholl cyclization, and are shown to be promising solution‐processable candidates for stable, transparent OFET deviceapplication.
Synthesis of Molecular Tripods Based on a Rigid 9,9′-Spirobifluorene Scaffold
作者:Michal Valášek、Kevin Edelmann、Lukas Gerhard、Olaf Fuhr、Maya Lukas、Marcel Mayor
DOI:10.1021/jo501029t
日期:2014.8.15
The efficient synthesis of a new tripodal platform based on a rigid 9,9′-spirobifluorene with three acetyl protected thiol groups in the positions 2, 3′ and 6′ for deposition on Au(111) surfaces is reported. The modular 9,9′-spirobifluorene platform provides both a vertical arrangement of the molecular rod in position 7 and its electronic coupling to the gold substrate. To demonstrate the validity