Donor–Acceptor–Acceptor-Conjugated Dual-State Emissive Acrylonitriles: Investigating the Effect of Acceptor Unit Order and Biological Imaging
Zhu Xiaoming, Lu Feng, Shixian Cao, Jianguo Wang, Guangle Niu
Abstract
The effect of acceptor unit order on the photophysical properties of two distinct donor-acceptor-acceptor conjugated fluorescent acrylonitriles, TPA-AN-PhBT and TPA-BT-ANPh, was systematically investigated. Compared with faintly emissive TPA-AN-PhBT in solution, TPA-BT-ANPh showed strong red-shifted fluorescence. TPA-AN-PhBT and TPA-BT-ANPh exhibited enhanced green and deep red emissions with remarkable fluorescence quantum yields up to 44% in the solid state. In addition, TPA-BT-ANPh possessed stronger two-photon absorption than TPA-AN-PhBT. Furthermore, these biocompatible dyes served as excellent fluorescent markers for specific lipid droplet imaging.
Topics & Concepts
ChemistryAcceptorConjugated systemFluorescencePhotochemistryAbsorption (acoustics)Organic chemistryMaterials sciencePolymerCondensed matter physicsPhysicsQuantum mechanicsComposite materialLuminescence and Fluorescent MaterialsPorphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer Studies