Phenyl-Modified Carbon Nitride Quantum Dots with Distinct Photoluminescence Behavior
Phenyl-Modified Carbon Nitride Quantum Dots with Distinct Photoluminescence Behavior
复制标题
具有独特光致发光行为的苯基修饰氮化碳量子点
DOI：
10.1002/anie.201511217
复制
发表时间：
2016-03-07
影响因子：
16.6
通讯作者：
Shalom, Menny
中科院分区：
文献类型：
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作者：
Cui, Qianling;Xu, Jingsan;Shalom, Menny
通过超分子预组装的方法，在石墨氮化碳结构中引入苯基，制备了一种新型的量子点（Ph-CN）。这种方法不需要化学蚀刻或水热处理，就像其他竞争性纳米颗粒合成一样，使用起来简单安全。Ph-CN纳米粒子表现出明亮的，可调的荧光，在水胶体悬浮液中的量子产率为48.4%。有趣的是，所观察到的约200 nm的斯托克斯位移高于基于氮化碳的荧光团所报道的最大值。高的量子产率和大的斯托克斯位移与苯基的结构表面组织有关，这影响了共轭氮化碳网络中的电子离域并诱导胶体稳定性。Ph-CN纳米颗粒在成像中的显着性能通过与HeLa细胞的简单孵育研究来证明。
A novel type of quantum dot (Ph-CN) is manufactured from graphitic carbon nitride by lining the carbon nitride structure with phenyl groups through supramolecular preorganization. This approach requires no chemical etching or hydrothermal treatments like other competing nanoparticle syntheses and is easy and safe to use. The Ph-CN nanoparticles exhibit bright, tunable fluorescence, with a high quantum yield of 48.4% in aqueous colloidal suspensions. Interestingly, the observed Stokes shift of approximately 200nm is higher than the maximum values reported for carbon nitride based fluorophores. The high quantum yield and the large Stokes shift are related to the structural surface organization of the phenyl groups, which affects the -electron delocalization in the conjugated carbon nitride networks and induces colloidal stability. The remarkable performance of the Ph-CN nanoparticles in imaging is demonstrated by a simple incubation study with HeLa cells.