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首页> 外文期刊>Chemistry: A European journal >Synthesis and characterization of photoswitchable fluorescent SiO _2 nanoparticles
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Synthesis and characterization of photoswitchable fluorescent SiO _2 nanoparticles

机译：光开关荧光SiO _2纳米粒子的合成与表征

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摘要

Switchable fluorescent silica nanoparticles have been prepared by covalently incorporating a fluorophore and a photochromic compound inside the particle core. The fluorescence can be switched reversibly between an on- and off-state via energy transfer. The particles were synthesized using different amounts of the photoswitchable compound (spiropyran) and the fluorophore (rhodamine B) in a size distribution between 98 and 140 nm and were characterized in terms of size, switching properties, and fluorescence efficiency by TEM, and UVVis and fluorescence spectroscopy. Switchable fluorescent silica nanoparticles have been prepared by incorporating a fluorophore and a photoswitch within the particle core. The fluorescence can be reversibly switched between an on- and off-state via energy transfer. Particles have been obtained that contain different amounts of the photoswitch and fluorophore, and have been characterized in terms of size, switching properties, and fluorescence efficiency (see figure).
机译：通过将荧光团和光致变色化合物共价结合到颗粒核内，已经制备了可转换的荧光二氧化硅纳米颗粒。荧光可以通过能量转移在开启和关闭状态之间可逆地切换。使用大小不同的光可开关化合物（spiropyran）和荧光团（若丹明B）合成的颗粒，其粒径分布在98至140 nm之间，并通过TEM和UV对粒径，开关特性和荧光效率进行了表征。可见光谱和荧光光谱。通过将荧光团和光开关掺入颗粒核中来制备可转换的荧光二氧化硅纳米颗粒。荧光可以通过能量转移在开启和关闭状态之间可逆地切换。已获得包含不同数量的光敏开关和荧光团的颗粒，并已在尺寸，开关特性和荧光效率方面进行了表征（见图）。

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