通过在四苯乙烯基ae -发光剂中加入芘来放大发射强度

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-18 DOI:10.1016/j.jlumin.2025.121257

Jun-Wei Xu, Yi-Ting Ou, Men-Hsin Hsieh, Tzu-Yun Tseng, Chih-Hsien Chen

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引用次数: 0

摘要

研究人员设计了一系列发色团（PyOMe、dPyOMe 和 dPyAN），以探索在基于四苯基乙烯（TPE）的聚集诱导发光（AIE）光源中加入芘后如何提高发光性能。发射量子产率（Φ）测量结果显示，在含水量为 90% 的 H2O/THF 溶液中，PyOMe 的 Φ 值为 0.27，而 dPyOMe 和 dPyAN 的 Φ 值分别为 0.36 和 0.44。芘的引入抑制了分子内旋转，增加了辐射转变，从而提高了发射强度。在 77 K 温度下进行的低温研究显示，发射波长发生了显著的低色度偏移，这表明冷冻的单一发色团与聚集态之间的分子相互作用存在差异。还对固态荧光量子产率进行了评估，发现 dPyAN 薄膜的 Φ 值达到了 0.48。研究结果表明，基于芘官能化 TPE 的发光体在光电设备中具有很大的应用潜力。

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Amplifying emission strength via incorporating pyrenes in tetraphenylethene-based AIE-luminogens

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Amplifying emission strength via incorporating pyrenes in tetraphenylethene-based AIE-luminogens

A series of chromophores, PyOMe, dPyOMe, and dPyAN, was designed to explore the enhancement of emission properties by incorporating pyrene into tetraphenylethene (TPE)-based aggregation-induced emission (AIE) luminogens. Emission quantum yield (Φ) measurements revealed that in 90 % water fraction H₂O/THF solutions, PyOMe exhibited a Φ of 0.27, whereas dPyOMe and dPyAN displayed higher values of 0.36 and 0.44, respectively. The introduction of pyrene contributed to enhanced emission intensities by suppressing intramolecular rotations and increasing the radiative transition. Low-temperature studies at 77 K showed significant hypsochromic shifts in emission wavelengths, indicating the difference in molecular interactions between frozen single chromophores and aggregated states. Solid-state fluorescence quantum yields were also evaluated, with dPyAN thin film achieving a Φ of 0.48. The findings suggest that pyrene-functionalized TPE-based luminogens have strong potential for use in optoelectronic devices.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.