Bertorelle Franck, Moulin Christophe, Soleilhac Antonin, Comby-Zerbino Clothilde, Dugourd Philippe, Russier-Antoine Isabelle, Brevet Pierre-François, Antoine Rodolphe
Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR5306, 69622, Lyon, France.
Chemphyschem. 2018 Jan 19;19(2):165-168. doi: 10.1002/cphc.201701186. Epub 2017 Dec 20.
Increasing fluorescence quantum yields of ligand-protected gold nanoclusters has attracted wide research interest. The strategy consisting in using bulky counterions has been found to dramatically enhance the fluorescence. In this Communication, we push forward this concept to the nonlinear optical regime. We show that by an appropriate choice of bulky counterions and of solvent, a 30-fold increase in two-photon excited fluorescence (TPEF) signal at ≈600 nm for gold nanoclusters can be obtained. This would correspond to a TPEF cross-section in the range of 0.1 to 1 GM.
提高配体保护的金纳米团簇的荧光量子产率引起了广泛的研究兴趣。人们发现，使用体积较大的抗衡离子的策略可以显著增强荧光。在本通讯中，我们将这一概念拓展到非线性光学领域。我们表明，通过适当选择体积较大的抗衡离子和溶剂，金纳米团簇在≈600 nm处的双光子激发荧光（TPEF）信号可提高30倍。这将对应于0.1至1 GM范围内的TPEF截面。
