Reversible fluorescence modulation of spiropyran-functionalized carbon nanoparticles
Reversible fluorescence modulation of spiropyran-functionalized carbon nanoparticles
复制标题
螺吡喃功能化碳纳米粒子的可逆荧光调制
DOI：
10.1039/c3tc00906h
复制
发表时间：
2013-01-01
影响因子：
6.4
通讯作者：
Chen, Jian
中科院分区：
文献类型：
--
作者：
Liao, Bo;Long, Peng;Chen, Jian
以乙二胺四乙酸二钠（EDTA中心点2Na）为原料，通过水热碳化法制备了直径约为3 nm的蓝绿光荧光碳纳米颗粒（CNPs）。然后，将CNP用螺吡喃官能化以获得螺吡喃官能化的CNP。在紫外光照射后，通过能量转移，中心在510 nm处的螺吡喃官能化的CNP的发射可以被关闭，而在650 nm处被打开。该过程可以通过使用可见光照射来逆转。荧光的光开关重复10次而没有明显的“疲劳”，显示出优异的光可逆性和高稳定性。螺吡喃功能化的CNPs可能在生物成像和标记、可逆数据存储/擦除以及个体光依赖性纳米级器件中找到潜在的应用。
Fluorescent carbon nanoparticles (CNPs) with diameters of about 3 nm which can emit blue-green light were synthesized through the hydrothermal carbonization of ethylenediaminetetraacetic acid disodium salt (EDTA center dot 2Na). Then, the CNPs were functionalized with spiropyrans to obtain the spiropyran-functionalized CNPs. The emission of the spiropyran-functionalized CNPs centered at 510 nm could be switched off, while being turned on at 650 nm via energy transfer after UV light irradiation. The process could be reversed by using visible light irradiation. The optical switching of the fluorescence was repeated 10 times without apparent "fatigue", showing excellent photoreversibility and high stability. Spiropyran-functionalized CNPs may find potential applications in biological imaging and labeling, reversible data storage/erasing, as well as individual light-dependent nanoscale devices.