Charging a Negatively Curved Nanographene and Its Covalent Network
作者:Yiqun Zhang、Yikun Zhu、Danni Lan、Sai Ho Pun、Zheng Zhou、Zheng Wei、Ying Wang、Hung Kay Lee、Chao Lin、Jiangpeng Wang、Marina A. Petrukhina、Quan Li、Qian Miao
DOI:10.1021/jacs.1c01642
日期:2021.4.7
toward negativelycurvedcarbon allotropes from octabenzo[8]circulene, a negativelycurvednanographene. Stepwise chemical reduction reactions of octabenzo[8]circulene with alkali metals lead to a unique highly reduced hydrocarbon pentaanion, which is revealed by X-ray crystallography suggesting a local view for the reduction and alkali metal intercalation processes of negativelycurvedcarbon allotropes
这项研究探索了一种自下而上的方法,用于处理八角形苯并[8]环戊烯(一种负弯曲的纳米石墨烯)的负弯曲碳同素异形体。八苯并[8]环与碱金属的逐步化学还原反应会导致独特的高度还原的烃五价阴离子,X射线晶体学表明这表明负曲面碳同素异形体的还原和碱金属嵌入过程的局部视图。通过镍介导的Yamamoto偶联反应聚合八苯并[8]环的四溴衍生物,得到了一种新型的富含碳的多孔材料,该材料由负弯曲纳米石墨烯的共价网络组成。它的比表面积为732 m 2 g –1并用作用于显示830毫安的最大容量的锂离子电池的阳极材料·克-1以100mA·g的电流密度-1。这些结果表明,该共价网络呈现负曲碳同素异形体的关键结构和功能特征。
An Obtuse-angled Corner Unit for Fluctuating Carbon Nanohoops
invention of cornerunits was the key factor that allowed the synthesis of cyclo‐para‐phenylenes with strained curved π‐systems. Despite only a few scarce instances of the development of cornerunits to date, a variety of structural congeners have been synthesized. These preceding cornerunits commonly possessed directing angles of ≤90°, which enabled the macrocyclization of multiple units, up to six
An organic electroluminescent device includes a light-emitting layer containing at least one host material and at least one luminescent dopant serving as a guest. The host material is a polymer having repeating units linked to each other by non-conjugated bonds and the luminescent dopant is a Π-conjugated oligomer.
COMPOUND FOR ORGANIC EL DEVICE AND ORGANIC EL DEVICE
申请人:FUJITA Tetsuji
公开号:US20080090102A1
公开(公告)日:2008-04-17
A compound for an organic EL device as a light-emitting material for use in an organic EL device is provided. The compound includes a polymer molecule containing a light-emitting molecule for determining a luminescent color region of the light-emitting material, and molecules represented by Formulas (1) to (4) as constituent units.
(wherein R represents an alkyl group, an aryl group, or an alkylaryl group)
(wherein R′ represents hydrogen, an alkyl group, or an alkylaryl group)