Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas
Enhanced Quantum Yield of Fluorophores in Confined Spaces of Supermicroporous Silicas
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DOI：
10.1246/bcsj.20170291
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发表时间：
2018
影响因子：
4
通讯作者：
Shumpei Ogawa;Takuya Wakayama;Hiroto Watanabe;K. Hayashi;Shuhei Ogata;Y. Oaki;M. Hasegawa;H. Imai
中科院分区：
文献类型：
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作者：
Shumpei Ogawa;Takuya Wakayama;Hiroto Watanabe;K. Hayashi;Shuhei Ogata;Y. Oaki;M. Hasegawa;H. Imai
多环芳烃荧光团，如芘和二萘嵌苯，的光学性质是由二氧化硅基质中的中孔和超微孔的受限空间控制的。单分散芘和苝的荧光量子产率随着激基缔合物在1 nm超微孔中形成的限制而增加。当孔径接近分子大小时，通过抑制聚集、与电荷转移位点的相互作用和激发态的稳定化，经由受限空间中的荧光团实现具有高量子产率的固态荧光。
The optical properties of polycyclic aromatic hydrocarbon fluorophores, such as pyrene and perylene, are controlled by confined spaces of meso- and supermicropores in a silica matrix. The quantum yield of fluorescence from monodispersed pyrene and perylene increases with limitation of the excimer formation in 1 nm supermicropores. When the pore diameter is close to the molecular size, solid-state fluorescence having a high quantum yield is achieved via the fluorophores in the confined spaces by suppressing the aggregation, the interaction with charge-transfer sites and the stabilization of the excited state.