天然激光染料：激发态分子内质子转移（ESIPT）发光体及其在随机激光研究中的应用。

Massue Julien, Pariat Thibault, M Vérité Pauline, Jacquemin Denis, Durko Martyna, Chtouki Tarek, Sznitko Lech, Mysliwiec Jaroslaw, Ulrich Gilles

Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), UMR CNRS 7515, Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 Rue Becquerel, CEDEX 02, 67087 Strasbourg, France.

CEISAM, UMR CNRS 6230, BP 92208, 2 rue de la Houssinière, CEDEX 03, 44322 Nantes, France.

Nanomaterials (Basel). 2019 Jul 30;9(8):1093. doi: 10.3390/nano9081093.

A series of five excited-state intramolecular proton transfer (ESIPT) emitters based on a 2-(2'-hydroxyphenyl) benzoxazole (HBO) scaffold, functionalized with a mono-or bis-(trialkylsilyl) acetylene extended spacer are presented. Investigation of their photophysical properties in solution and in the solid-state in different matrix, along with ab initio calculations gave useful insights into their optical behavior. Random lasing studies were conducted on a series of PMMA doped thin films, showing the presence of stimulated emission above the threshold of pumping energy density (ρth ≈ 0.5-2.6 mJ cm). In this work, the similarity of four level laser systems is discussed in light of the ESIPT photocycle.

本文报道了一系列基于2-(2'-羟基苯基)苯并恶唑(HBO)骨架的激发态分子内质子转移(ESIPT)发光体，这些发光体通过单-(三烷基硅基)乙炔或双-(三烷基硅基)乙炔延长间隔基进行功能化。研究了它们在溶液和不同基质固态中的光物理性质，并结合从头算计算，深入了解了它们的光学行为。对一系列掺杂聚甲基丙烯酸甲酯(PMMA)的薄膜进行了随机激光研究，结果表明在泵浦能量密度阈值(ρth≈0.5 - 2.6 mJ/cm²)以上存在受激发射。在这项工作中，根据ESIPT光循环讨论了四能级激光系统的相似性。