Synthesis, photophysical characterization, and integration of two-photon-responsive fluorophores in mesoporous organosilica nanoparticles for biological imaging use
作者:Nicolas Bondon、Nicolas Richy、Lamiaa M.A. Ali、Denis Durand、Magali Gary-Bobo、Yann Molard、Grégory Taupier、Frédéric Paul、Nadir Bettache、Jean-Olivier Durand、Christophe Nguyen、Clarence Charnay、Olivier Mongin
DOI:10.1016/j.tet.2023.133577
日期:2023.9
synthesis of new graftable three-branched octupolar fluorophores (F and F2), based on a triphenylamine core connected to electron-withdrawing sulfone-based peripheral groups through one or two π-conjugated phenylene-vinylene linkers. Their two-photon absorption (TPA), solvatochromism and photoluminescence properties were investigated to derive structure-property relationships. Notably, the chromophores presented
我们报告了新型可接枝三支链八极荧光团(F 和 F2)的合成,该荧光团基于三苯胺核心,通过一个或两个 π 共轭亚苯基-亚乙烯基连接体连接到吸电子砜基外围基团。研究了它们的双光子吸收(TPA)、溶剂化变色和光致发光性质,以得出结构-性质关系。值得注意的是,F 和 F2 的发色团在生物窗口 (700-900 nm) 中呈现 TPA 条带,并且在 810 GM 峰值处呈现高 TPA 横截面。然后,在硅烷化后,荧光团 F 进一步共价整合到不同周期性介孔有机二氧化硅纳米颗粒 (PMO NP) 的溶胶-凝胶合成中。透射电子显微镜成像显示形成了具有良好尺寸单分散性的球形纳米粒子,通过动态光散射测量证实。所获得的基于荧光团的纳米平台被证明具有生物相容性在体外,并证明了使用双光子激发荧光显微镜在癌细胞中进行双光子成像的良好潜力。