当前位置: X-MOL 学术Angew. Chem. Int. Ed. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Undecabenzo[7]superhelicene: A Helical Nanographene Ribbon as a Circularly Polarized Luminescence Emitter
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-10-02 , DOI: 10.1002/anie.201808178
Carlos M. Cruz 1 , Silvia Castro-Fernández 1 , Ermelinda Maçôas 2 , Juan M. Cuerva 1 , Araceli G. Campaña 1
Affiliation  

The synthesis and characterization of an enantiopure superhelicene nanographene is reported in which two saddle‐shaped and one planar hexabenzocoronene (HBC) units are arranged in a helicoidal shape to form an undecabenzo[7]carbohelicene. The described compound is the first fully π‐extended [7]helicene. Racemic resolution of the helical nanographene permitted analysis of the chiroptical properties and revealed dissymmetry factors in the range of 2×10−3 both in the absorption and in the emission measurements. Remarkably, non‐linear photophysical analysis demonstrated a two‐photon absorption cross‐section of 870 GM at 800 nm and a perfect overlap between linear, non‐linear, and chiral emissions.

中文翻译:

十一碳苯并[7]超螺旋烯:螺旋纳米石墨烯带作为圆极化发光体。

据报道,对映体纯超螺旋烯纳米石墨烯的合成和表征是,两个鞍形和一个平面六苯并六氢呋喃(HBC)单元以螺旋形状排列以形成十一苯并[7]碳硼烷。所描述的化合物是第一个完全π扩展的[7]螺旋。螺旋纳米石墨烯的外消旋分辨率可以分析手性,并在吸收和发射测量中发现不对称因子在2×10 -3的范围内。值得注意的是,非线性光物理分析表明,在800 nm处有870 GM的双光子吸收截面,并且线性,非线性和手性发射之间存在完美的重叠。
更新日期:2018-10-02
down
wechat
bug