Strong two-photon absorption enhancement in a unique bis-porphyrin bearing a diketopyrrolopyrrole unit
作者:Agnieszka Nowak-Król、Marek Grzybowski、Jerzy Romiszewski、Mikhail Drobizhev、Geoffrey Wicks、Maciej Chotkowski、Aleksander Rebane、Ewa Górecka、Daniel T. Gryko
DOI:10.1039/c3cc44728f
日期:——
A π-extended bis-porphyrin bridged via a diketopyrrolopyrrole unit was prepared in 5 steps. This fully conjugated π-system displays strongly distorted linear absorption, while its two-photon absorption cross-section reaches 2500–3000 GM at 940 nm. LC-like behaviour, easy orientation and low viscosity are, according to XRD, POM and DSC measurements, due to formation of plastic rather than a liquid crystal.
我们通过 5 个步骤制备出了通过二酮吡咯吡咯单元桥接的 π-扩展双卟啉。这种完全共轭的 π 系统具有强烈的扭曲线性吸收,其双光子吸收截面在 940 纳米波长处达到 2500-3000 GM。根据 XRD、POM 和 DSC 测量,这种类似液晶的行为、易取向性和低粘度是由于形成了塑料而非液晶。