Poly(pyridinium phenylene) conjugated polymers are synthesized by a cross-coupling and cyclization sequence. These polyelectrolytes are freely soluble in water and display high degrees of electroactivity. When reduced (n-doped) these materials display in situ conductivities as high as 160 S/cm. The high conductivity is attributed to the planar structure that is enforced by the cyclic structures of the polymer. The electron affinities are compared to PCBM, a C(60) based n-type material. We find that these polymers undergo excited state electron transfer reactions with other donor conjugated polymers and hence may find utility in photovoltaic devices.
Nonplanar Tub-Shaped Benzocyclooctatetraenes via Halogen-Radical Ring Opening of Dihydrobiphenylenes
作者:Jesús Bello-García、Damián Padín、Jesús A. Varela、Carlos Saá
DOI:10.1021/acs.orglett.1c01881
日期:2021.7.16
(bCOT’s). Cross-couplings and Diels–Alder reactions of the brominated bCOT’s allow the formation of the corresponding eight-membered ring-fused PAH’s. The halogen-radical ring opening probably occurs via a selective formation of a bis-allyl radical at the 1,3-cyclohexadiene moiety, halogenation at the bridgehead carbon, and finally electrocyclic ring opening.
requirements: Crystals and thin films of 1,4‐bis(alkenyl)‐2,5‐dipiperidinobenzenes, which contain only one benzene ring as the aromatic component, emit visible light with excellent solid‐state quantum yields upon irradiation with UV light. Polystyrene thin films doped with the benzenes also exhibit brilliant fluorescence. By modifying the alkenyl groups, the emission color can be tuned in the range from blue
A high efficiency pure organic room temperature phosphorescence polymer PPV derivative for OLED
作者:Ying He、Nianhe Cheng、Xin Xu、Jiawei Fu、Jun-an Wang
DOI:10.1016/j.orgel.2018.10.012
日期:2019.1
75 eV, respectively, showing a great potential application in the emitting layer of OLED. A device fabricated with the PPV derivative as the emitting material layer shows a max luminance of 194 cd/m2 when the Br-PPV-CHO content was 0.5 wt %, demonstrating the best RTP performance. The good properties of Br-PPV-CHO come from the substituent groups of bromine and aromatic aldehyde, and the molecular structure
为了提高装置效率并降低成本,有必要开发具有室温磷光(RTP)的纯有机分子。设计并合成了一种高效的纯有机RTP聚合物聚对亚苯基亚乙烯基(PPV)衍生物(Br-PPV-CHO),它在496 nm处具有蓝色发射,发射寿命为14.1μs,并且具有光致发光性。量子产率为12.2%,HOMO和LUMO分别为-5.35 eV和-2.75 eV,显示出在OLED发射层中的巨大潜力。用PPV衍生物作为发光材料层制造的器件的最大亮度为194 cd / m 2当Br-PPV-CHO的含量为0.5重量%时,显示出最佳的RTP性能。Br-PPV-CHO的优良性能来自于溴和芳香醛的取代基,PPV衍生物的分子结构设计策略为有机RTP材料的设计和合成提供了有用的指导。
作者:Jongbok Lee、Huanbin Li、Alexander J. Kalin、Tianyu Yuan、Chenxu Wang、Troy Olson、Hanying Li、Lei Fang
DOI:10.1002/anie.201707595
日期:2017.10.23
Well‐defined, fused‐ring aromatic oligomers represent promising candidates for the fundamental understanding and application of advanced carbon‐rich materials, though bottom‐up synthesis and structure–property correlation of these compounds remain challenging. In this work, an efficient synthetic route was employed to construct extended benzo[k]tetraphene‐derived oligomers with up to 13 fused rings. The
定义明确的稠环芳族低聚物代表了对高级富碳材料的基础理解和应用的有前途的候选者,尽管这些化合物的自下而上合成和结构-性能相关性仍然具有挑战性。在这项工作中,采用了有效的合成途径来构建具有多达13个稠合环的扩展的苯并[ k ]四苯衍生的低聚物。这些化合物的分子和电子结构得到了清楚的阐明。建立了分子大小与结晶动力学的精确关联,从而证明了分子间相互作用与分子迁移率之间的关键平衡,以优化处理这些扩展的共轭分子的高度有序的固体。