Silica cross-linked nanoparticles encapsulating fluorescent conjugated dyes for energy transfer-based white light emission and porphyrin sensing
Silica cross-linked nanoparticles encapsulating fluorescent conjugated dyes for energy transfer-based white light emission and porphyrin sensing
复制标题
二氧化硅交联纳米颗粒封装荧光共轭染料，用于基于能量转移的白光发射和卟啉传感
DOI：
10.1039/c2nr31194a
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发表时间：
2012-01-01
期刊：
影响因子：
6.7
通讯作者：
Huo, Qisheng
中科院分区：
文献类型：
--
作者：
Gai, Fangyuan;Zhou, Tianlei;Huo, Qisheng
本工作表明，水溶性荧光杂化材料可以成功地合成使用二氧化硅交联胶束纳米粒子（SCMNPs）作为支架，封装荧光共轭染料的pH值传感，卟啉传感和可调的颜色发射。三种染料分别封装在SCMNPs（简称染料SCMNPs）。每一种染料SCMNPs在水中的寿命比在有机溶剂中溶解的游离染料的寿命长。7-（十六烷氧基）香豆素-3-甲酸乙酯（HCE）封装在SCMNPs（HCE-SCMNPs）表现出荧光猝灭的pH值变化在水介质中。进一步证实了HCE-SCMNPs与四苯基卟啉（TPP）之间存在辐射和非辐射能量传递过程，并以此合成了水溶性TPP传感器。值得注意的是，掺杂有5，12-双子基-喹吖啶酮（8 CQA）和TPP的HCE-SCMNPs在376 nm的单重激发下显示出水溶性白色光发射（CIE（0.29，0.34）），这是由于8 CQA的颜色调节和从HCE（供体）到TPP（受体）的能量转移。
This work demonstrated that water-soluble fluorescent hybrid materials can be successfully synthesized by use of silica cross-linked micellar nanoparticles (SCMNPs) as scaffolds to encapsulate fluorescent conjugated dyes for pH sensing, porphyrin sensing and tunable colour emission. Three dyes were separately encapsulated inside SCMNPs (short to dye-SCMNPs). Each of the dye-SCMNPs indicated longer lifetime in water than that of free dye dissolved in organic solvent. The 7-(hexadecyloxy) coumarin-3-ethylformate (HCE) encapsulated inside SCMNPs (HCE-SCMNPs) exhibited fluorescence quenching by pH change in aqueous media. Furthermore, it was confirmed that the radiative and nonradiative energy transfer processes both occurred between HCE-SCMNPs and tetraphenyl-porphyrin (TPP), which were used to synthesize the water-soluble TPP sensor. Significantly, HCE-SCMNPs doped with 5,12-dicotyl-quinacridone (8CQA) and TPP showed water-soluble white light emission (CIE (0.29, 0.34)) upon singlet excitation of 376 nm due to colour adjustment of 8CQA and energy transfer from HCE (donor) to TPP (acceptor).