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<p>8-hydroxyquinoline metal-organic complexes have become one of the promising organic photoluminescent materials due to their stable chelating structure, highly adjustable photoluminescence properties, low cost and easy processing, as well as wide application scenarios. In this study, SrQ<sub>2</sub> nanomaterials were successfully synthesized via a hydrothermal method at different temperatures (110–140&#xa0;°C). Systematic characterization indicated that as the temperature increased, the material gradually transformed from a mixed state of β phase and amorphous phase to a highly crystalline α phase, with the grain size decreasing from 25.43&#xa0;nm to 20.50&#xa0;nm, and the morphology presenting a regular nanocolumnar structure. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy confirmed the formation of a stable bidentate coordination structure (Sr–O/N), and the elemental composition was highly consistent with the theoretical value. Optical performance showed that the sample synthesized at 140&#xa0;°C had the best luminescent performance, with the maximum excitation and emission wavelengths being 405&#xa0;nm and 479&#xa0;nm, respectively, and the International Commission on Illumination coordinates were (0.1891, 0.3120), belonging to blue-green light emission, and the fluorescence lifetime was 4.424 ns. UV absorption was mainly located in the ultraviolet region (~ 260&#xa0;nm), indicating its sensitivity to ultraviolet light; Differential scanning calorimetry analysis showed that the material began to decompose above 200&#xa0;°C, demonstrating good thermal stability. In summary, SrQ<sub>2</sub> is a structurally stable, highly luminescent and thermally stable blue-green luminescent material, which has potential applications in latent fingerprint imaging, organic optoelectronics and ultraviolet detection fields.</p>

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Preparation of SrQ2 nanomaterials and investigation of their photophysical properties

  • 期刊论文

  • 发表日期：

    2026年8月5日

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  • Qingyuan Niu,
  • Shuxin Yin,
  • Feng Luo,
  • Yumin Song,
  • Suihai Chen,
  • Bo Wang

摘要

8-hydroxyquinoline metal-organic complexes have become one of the promising organic photoluminescent materials due to their stable chelating structure, highly adjustable photoluminescence properties, low cost and easy processing, as well as wide application scenarios. In this study, SrQ2 nanomaterials were successfully synthesized via a hydrothermal method at different temperatures (110–140 °C). Systematic characterization indicated that as the temperature increased, the material gradually transformed from a mixed state of β phase and amorphous phase to a highly crystalline α phase, with the grain size decreasing from 25.43 nm to 20.50 nm, and the morphology presenting a regular nanocolumnar structure. Fourier transform infrared spectroscopy and energy-dispersive X-ray spectroscopy confirmed the formation of a stable bidentate coordination structure (Sr–O/N), and the elemental composition was highly consistent with the theoretical value. Optical performance showed that the sample synthesized at 140 °C had the best luminescent performance, with the maximum excitation and emission wavelengths being 405 nm and 479 nm, respectively, and the International Commission on Illumination coordinates were (0.1891, 0.3120), belonging to blue-green light emission, and the fluorescence lifetime was 4.424 ns. UV absorption was mainly located in the ultraviolet region (~ 260 nm), indicating its sensitivity to ultraviolet light; Differential scanning calorimetry analysis showed that the material began to decompose above 200 °C, demonstrating good thermal stability. In summary, SrQ2 is a structurally stable, highly luminescent and thermally stable blue-green luminescent material, which has potential applications in latent fingerprint imaging, organic optoelectronics and ultraviolet detection fields.