Effect of Particle Size and Capping on Photoluminescence Quantum Efficiency of 1,3,5-Triphenyl-2-pyrazoline Nanocrystals

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2003,（1）
• 页码范围: 79-82
• 页数: 4页
• 语种: 英文

摘要

Organic nanocrystals of 1,3,5-triphenyl-2-pyrazoline(TPP) with a series of sizes were synthesized by reprecipitation method. The luminescence quantum efficiency of TPP nanocrystals increases from 24.2% for the nanocrystals with an average size of 300 nm to 34.6% for those with an average size of 20 nm. Surface cappinb by polyvinyl pyrrolidone (PVP) will improve the quantum efficiency of TPP nanocrystals. The size-dependence and equilibrium between the TPP monomers and the aggregates in TPP nanocrystals.