Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba , 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan.
ACS Nano. 2016 Jul 26;10(7):7058-63. doi: 10.1021/acsnano.6b03188. Epub 2016 Jun 30.
Color-tunable resonant photoluminescence (PL) was attained from polystyrene microspheres doped with a single polymorphic fluorescent dye, boron-dipyrrin (BODIPY) 1. The color of the resonant PL depends on the assembling morphology of 1 in the microspheres, which can be selectively controlled from green to red by the initial concentration of 1 in the preparation process of the microspheres. Studies on intersphere PL propagation with multicoupled microspheres, prepared by micromanipulation technique, revealed that multistep photon transfer takes place through the microspheres, accompanying energy transfer cascade with stepwise PL color change. The intersphere energy transfer cascade is direction selective, where energy donor-to-acceptor down conversion direction is only allowed. Such cavity-mediated long-distance and multistep energy transfer will be advantageous for polymer photonics device application.
可调谐共振光致发光（PL）是从掺杂单一多晶型荧光染料硼二吡咯（BODIPY）1 的聚苯乙烯微球中获得的。共振 PL 的颜色取决于 1 在微球中的组装形态，通过在微球制备过程中 1 的初始浓度可以从绿色选择性地控制到红色。用微操作技术制备的多耦合微球的球间 PL 传播研究表明，多步光子转移通过微球发生，伴随着具有逐步 PL 颜色变化的能量转移级联。球间能量转移级联是有方向选择性的，其中仅允许能量给体-受体向下转换方向。这种腔介导的长程和多步能量转移将有利于聚合物光子学器件的应用。
