研究目的
Exploring the room temperature phosphorescence features of a solvent-free organic liquid phosphor in air and developing a large area paintable phosphorescent liquid composite with improved lifetime and quantum yield.
研究成果
The study successfully demonstrated RTP in a solvent-free organic liquid for the first time, facilitated by viscous medium, reduced ΔEST, and weak Br···O halogen bonding. A paintable RTP composite with improved quantum yield and lifetime was developed, offering potential for large area flexible lighting applications.
研究不足
The study is limited to the exploration of RTP in solvent-free organic liquids and their composites with carbonyl guests. The potential for broader applications and the scalability of the paintable composite are areas for future research.
1：Experimental Design and Method Selection:
The study involved the synthesis and characterization of alkylated 4-bromo-1,8-naphthlimides 1 and 2, followed by photophysical characterization.
2：Sample Selection and Data Sources:
Samples were characterized by 1H, 13C NMR, and MALDI-TOF MS. Photophysical properties were analyzed using absorption and steady-state emission spectra.
3：List of Experimental Equipment and Materials:
Differential scanning calorimetry (DSC) for determining melting and glass transition temperatures, thermogravimetric analysis (TGA) for thermal stability, and X-ray diffraction (XRD) for structural analysis.
4：Experimental Procedures and Operational Workflow:
Phosphorescence measurements were conducted in neat form and in solution, with lifetime decay profiles recorded.
5：Data Analysis Methods:
TD-DFT computations were carried out to probe the phosphorescence further, and natural bond orbital analysis was performed to understand intermolecular interactions.
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