期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 15, 页码 8528-8534出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta00277a
关键词
-
资金
- National Natural Science Foundation of China [21702020]
- China Scholarship Council [202008320118, 202008340021]
- Anhui Provincial Natural Science Foundation [2108085QB47]
In this paper, an efficient light-harvesting system (LHS) was fabricated by integrating three fluorescence mechanisms, i.e. aggregation-induced emission (AIE), excited-state intramolecular proton-transfer (ESIPT), and Forster resonance energy transfer (FRET). The LHS showed satisfactory energy-transfer efficiency and high sensing capabilities for Cu2+ ions.
It is of great significance to combine different fluorescence mechanisms to accurately regulate the properties of organic fluorescent materials, such as the Stokes shift, emission intensity and photoluminescence color. In this paper, we employ an integration of three fluorescence mechanisms, i.e. aggregation-induced emission (AIE), excited-state intramolecular proton-transfer (ESIPT), and Forster resonance energy transfer (FRET), to fabricate an efficient light-harvesting system (LHS). We firstly designed and synthesized a spirocyclic spacer bridged tetraphenylethylene (TPE) dimer L, in which the spacer and TPE are linked together by Schiff-base groups. The TPE units endow L with AIE behavior, while the Schiff-base groups offer L with ESIPT properties. Subsequently, highly fluorescent nanoparticles (NPs) with large Stokes shift were prepared by a facile reprecipitation strategy from L based on the ESIPT-AIE dual mechanism. By employing L as an energy donor and a dye NDI as an energy acceptor, an efficient artificial LHS with tunable properties could be constructed as dispersed NPs in water solution (f(w) = 90%) based on the ESIPT-AIE-FRET triple mechanism. The LHS showed satisfactory energy-transfer efficiency and a high antenna effect. In addition, the fabricated LHS was applied in the selective detection of Cu2+ ions and exhibited excellent sensing capabilities with a large Stokes shift and red fluorescence quenching responsiveness. The present work will open a new avenue for developing tunable multi-mechanism fluorescent materials and show great potential applications in the fields of sensing, bio-imaging, and light-harvesting devices.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据