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A Thermally Stabilized Fluorescent Organic Chromophore

机译：热稳定的荧光有机发色团

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摘要

A fluorescent chromophore, hereby designated as cyanine dye, has been bound to generated zinc oxide nanoparticles. It has been shown that the material not only retains the characteristic absorption peak of the native chromophore, but it also continues to fluoresce with comparable intensity. The binding occurs through a Zn -- O2C bridge, which allows for vibrational relaxation as the dye heats up, yet also preserves the optical properties of the dye. This bond linkage can be observed from the comparison of FT-IR spectra of the nanoparticles and the native dye, designated by a shift in one of the peaks at 1730 cm-1. The nanoparticle-dye material has been characterized through a variety of techniques, including differential scanning calorimetry, thermal gravimetric analysis, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The thermal stability of the dye was improved from a significant level of decomposition by 200 °C to nearly no loss of mass at 350 °C. It proved impossible to record a Raman spectrum of the dye itself, as the laser degraded the dye before measurements could be taken, but the thermal stabilization of the nanomaterial also allowed the dye to be examined by Raman spectroscopy without decomposition. Both the dye and the nanomaterial exhibit the same Stokes shift, from the 819 nm absorbance peak to an 850-nm emission peak.
机译：荧光生色团，在此被称为花青染料，已经与生成的氧化锌纳米粒子结合。已经表明，该材料不仅保留了天然发色团的特征吸收峰，而且还以相当的强度继续发出荧光。结合是通过Zn-O2C桥发生的，该桥允许在染料加热时产生振动松弛，同时还保留了染料的光学性质。可以从纳米颗粒和天然染料的FT-IR光谱比较中观察到这种键连接，该光谱由1730 cm-1处一个峰的移动表示。纳米染料材料已经通过多种技术进行了表征，包括差示扫描量热法，热重分析，扫描电子显微镜和能量色散X射线光谱学。染料的热稳定性从200℃的显着分解水平提高到350℃几乎没有质量损失。事实证明，记录染料本身的拉曼光谱是不可能的，因为在进行测量之前激光会降解染料，但是纳米材料的热稳定性也使染料可以通过拉曼光谱进行检查而不会分解。染料和纳米材料都显示出相同的斯托克斯位移，从819 nm的吸收峰到850 nm的发射峰。

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  • 作者

    Hughes, Brendan Patrick.;

  • 作者单位

    State University of New York at Binghamton.;

  • 授予单位 State University of New York at Binghamton.;
  • 学科 Chemistry.;Materials science.
  • 学位 M.S.
  • 年度 2017
  • 页码 64 p.
  • 总页数 64
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水产、渔业;
  • 关键词

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