Achieving room-temperature phosphorescence of coumarin derivatives by hydrogen-bonding networks and multicolor superfluorescence by resonance energy transfer

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-04-02 DOI:10.1016/j.dyepig.2025.112765

Hua Feng , Mingyue Dong , Zhiqiang Yang , Bing Yang , Fushun Liang , Zhongmin Su

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Abstract

Room-temperature phosphorescence (RTP) materials hold promise for applications in bioimaging, anti-counterfeiting, and optoelectronics, yet the design of purely organic RTP materials remains challenging due to significant non-radiative deactivation pathways. This study demonstrates a hydrogen-bonding strategy to suppress non-radiative transitions. Photophysical characterizations revealed that CCA/PAA exhibits green afterglow with a lifetime of 374 ms, while the BrCCA/PAA film achieved an enhanced quantum yield of 27.88 % due to the heavy-atom effect of the bromine. Further, by incorporating fluorescent dyes into CCA/PAA, multicolor Superfluorescence was achieved through triplet-to-singlet resonance energy transfer. These findings demonstrated the capability to tune afterglow colors and lifetimes by varying the doping ratios and energy acceptor types. This work not only provides insights into the role of hydrogen bonding and heavy-atom effects in RTP materials but also offers a pathway for designing advanced optical materials with tunable and high-performance characteristics.

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利用氢键网络实现香豆素衍生物的室温磷光，利用共振能量转移实现多色超荧光

室温磷光（RTP）材料在生物成像、防伪和光电子学等领域有着广阔的应用前景，但由于存在显著的非辐射失活途径，纯有机磷光材料的设计仍然具有挑战性。本研究展示了一种氢键策略来抑制非辐射跃迁。光物理表征表明，CCA/PAA薄膜呈现绿色余辉，寿命为374 ms，而BrCCA/PAA薄膜由于溴的重原子效应，量子产率提高了27.88%。此外，将荧光染料加入到CCA/PAA中，通过三重态到单线态的共振能量转移实现了多色超荧光。这些发现证明了通过改变掺杂比和能量受体类型来调整余辉颜色和寿命的能力。这项工作不仅提供了对氢键和重原子效应在RTP材料中的作用的见解，而且为设计具有可调谐和高性能特性的先进光学材料提供了途径。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.