Controllable preparation of solid-state fluorescent polymer dots by gaseous detonation

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Diamond and Related Materials Pub Date : 2025-02-25 DOI:10.1016/j.diamond.2025.112151

Saiwei Cheng , Weikai Xu , Chuang He , Shengbo Zhou , Honghao Yan

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Abstract

Polymer dots (PDs) have attracted significant research interest owing to their remarkable optical properties. However, high-performance PDs often suffer from severe aggregation-induced fluorescence quenching in the solid state, limiting their practical applications. The gaseous detonation method offers a promising approach for synthesizing PDs while overcoming this limitation. Despite its potential, the relationship between detonation reaction conditions and the morphology and optical properties of PDs remains largely unexplored. This study systematically investigates the effects of varying the total precursor mass (citric acid (CA) and urea), the molar ratio of H₂ to O₂, and the mass ratio of CA to urea on the morphology and optical properties of PDs. The results indicate that the initial reaction conditions, including the total mass of precursors, the molar ratio of H₂ to O₂, and the mass ratio of CA to urea, affect the microstructure (average particle size, crystallinity) and photoluminescence quantum yield (PLQY) of the prepared PDs. However, it was found that these conditions have almost no effect on the ultraviolet-visible (UV–Vis) spectra, photoluminescence (PL) emission spectra, and the types of surface groups of the products. This study provides a theoretical foundation for optimizing the preparation of PDs using the gaseous detonation method.

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聚合物点（PDs）因其非凡的光学特性而备受研究关注。然而，高性能的聚合物点在固态下往往会出现严重的聚集诱导荧光淬灭现象，从而限制了它们的实际应用。气态引爆法为合成持久性有机污染物提供了一种很有前景的方法，同时也克服了这一限制。尽管气爆法潜力巨大，但其反应条件与持久性有机污染物的形态和光学特性之间的关系在很大程度上仍未得到探讨。本研究系统地探讨了改变前驱体总质量（柠檬酸（CA）和尿素）、H2 与 O2 的摩尔比以及 CA 与尿素的质量比对 PDs 形状和光学性质的影响。结果表明，初始反应条件（包括前驱体的总质量、H2 与 O2 的摩尔比以及 CA 与尿素的质量比）会影响制备出的多孔固体的微观结构（平均粒径、结晶度）和光致发光量子产率（PLQY）。但研究发现，这些条件对紫外可见光谱（UV-Vis）、光致发光（PL）发射光谱和产品表面基团类型几乎没有影响。这项研究为优化使用气体引爆法制备多聚二苯醚提供了理论基础。

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来源期刊

Diamond and Related Materials 工程技术-材料科学：综合

CiteScore

6.00

自引率

14.60%

发文量

702

审稿时长

2.1 months

期刊介绍： DRM is a leading international journal that publishes new fundamental and applied research on all forms of diamond, the integration of diamond with other advanced materials and development of technologies exploiting diamond. The synthesis, characterization and processing of single crystal diamond, polycrystalline films, nanodiamond powders and heterostructures with other advanced materials are encouraged topics for technical and review articles. In addition to diamond, the journal publishes manuscripts on the synthesis, characterization and application of other related materials including diamond-like carbons, carbon nanotubes, graphene, and boron and carbon nitrides. Articles are sought on the chemical functionalization of diamond and related materials as well as their use in electrochemistry, energy storage and conversion, chemical and biological sensing, imaging, thermal management, photonic and quantum applications, electron emission and electronic devices. The International Conference on Diamond and Carbon Materials has evolved into the largest and most well attended forum in the field of diamond, providing a forum to showcase the latest results in the science and technology of diamond and other carbon materials such as carbon nanotubes, graphene, and diamond-like carbon. Run annually in association with Diamond and Related Materials the conference provides junior and established researchers the opportunity to exchange the latest results ranging from fundamental physical and chemical concepts to applied research focusing on the next generation carbon-based devices.