Delayed fluorescence of acridine dyes induced by supramolecular assembly of terephthalic acid and melamine

IF 4.6 2区化学 Q1 SPECTROSCOPY Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-01-31 DOI:10.1016/j.saa.2025.125809

Xiangying Sun , Jianping Zeng , Xiaopeng Wang , Huaiqian Wang

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Abstract

Delayed fluorescence of organic dye materials with visible light excitation has expansive application prospects. Because of the coplanarity of fluorescent dyes and rigid matrix, the reverse cross rate between the systems is slow and the fluorescence life is long. Therefore, once the fluorescent dyes are assembled in the polymer matrix, the delayed fluorescence with strong intensity and long lifetime will be produced. Herein, terephthalic acid (PTA) with melamine (MA) were assembled into the rigid matrix of PTA-MA, delayed fluorescence of acridine dyes induced based on the energy transfer from PTA-MA to acridine dyes. The long afterglow of PTA-MA@AO with about 7 s under the UV light and visible light can be produced. The mechanism of dye delayed fluorescence, and the effects of dye type on optical properties were studied. PTA-MA@acridine dyes with different long afterglow properties were used to anti-counterfeiting applications.

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对苯二甲酸与三聚氰胺超分子组装诱导吖啶染料的延迟荧光

可见光激发下有机染料材料的延迟荧光具有广阔的应用前景。由于荧光染料与刚性基体的共平面性，使得体系间的反向交叉速率慢，荧光寿命长。因此，荧光染料一旦在聚合物基体中组装，就会产生强度强、寿命长的延迟荧光。本文将对苯二甲酸（PTA）与三聚氰胺（MA）组装成PTA-MA刚性基体，利用PTA-MA向吖啶染料的能量转移诱导吖啶染料的延迟荧光。在紫外光和可见光下可产生长约7 s的PTA-MA@AO余辉。研究了染料延迟荧光的机理，以及染料类型对光学性质的影响。PTA-MA@acridine染料具有不同的长余辉性能用于防伪应用。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.