Thomas Heidi, Fries Felix, Gmelch Max, Bärschneider Toni, Kroll Martin, Vavaleskou Thaleia, Reineke Sebastian
Technische Universität Dresden, Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Nöthnitzer Str. 61, 01187 Dresden, Germany.
Johann Wolfgang Goethe-Universität Frankfurt am Main, Institut für Anorganische und Analytische Chemie, Max-von-Laue-Straße 7, 60438 Frankfurt am Main, Germany.
ACS Omega. 2021 May 10;6(20):13087-13093. doi: 10.1021/acsomega.1c00785. eCollection 2021 May 25.
Currently, organic phosphorescent particles are heavily used in sensing and imaging. Up to now, most of these particles contain poisonous and/or expensive metal complexes. Environmentally friendly systems are therefore highly desired. A purely amorphous system consisting of poly(methyl methacrylate) particles with incorporated ,,','-tetrakis(4-carboxyphenyl)benzidine emitter molecules is presented in this work. Single particles with sizes between 400 and 840 nm show-depending on the environment-bright fluorescence and phosphorescence. The latter is observed when oxygen is not in the proximity of the emitting dye molecules. These particles can scavenge singlet oxygen, which is produced during the photoexcitation process, by incorporating it into the polymer matrix. This renders their use to be unharmful for the surrounding matter with possible application in marking schemes for living bodies.
目前，有机磷光粒子在传感和成像领域有大量应用。到目前为止，这些粒子大多含有有毒和/或昂贵的金属配合物。因此，非常需要环境友好型体系。本文介绍了一种由聚甲基丙烯酸甲酯颗粒与掺入的 ,,',' - 四（4 - 羧基苯基）联苯胺发射体分子组成的纯非晶体系。尺寸在400至840纳米之间的单个粒子根据环境呈现出明亮的荧光和磷光。当发射染料分子附近没有氧气时可观察到磷光。这些粒子可以通过将光激发过程中产生的单线态氧纳入聚合物基质来清除它。这使得它们在用于活体标记方案时对周围物质无害。
