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Related Concept Videos

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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for...
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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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When light passes through a substance, a portion of the light is absorbed while the remaining light is reflected or transmitted. If the molecule absorbs light between the wavelengths of 180–400 nm range, the UV spectrum is obtained, and if it absorbs light in the 400–780 nm wavelength range, the visible spectrum is obtained.     
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Related Experiment Video

Updated: Nov 21, 2025

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Azulene-A Bright Core for Sensing and Imaging.

Lloyd C Murfin1, Simon E Lewis1

  • 1Department of Chemistry, University of Bath, Bath BA2 7AY, UK.

Molecules (Basel, Switzerland)
|January 15, 2021
PubMed
Summary

Azulene

Area of Science:

  • Organic Chemistry
  • Analytical Chemistry

Background:

  • Azulene, a naphthalene isomer, exhibits unique color and fluorescence.
  • These properties enable its use in chemical sensors and dosimeters.

Purpose of the Study:

  • This review focuses on azulene-based fluorescent sensors.
  • It covers turn-on fluorescent sensors and applications in biological sensing and imaging.

Main Methods:

  • Literature review of azulene-based fluorescent sensors.
  • Analysis of azulene's protonation-dependent fluorescence.
  • Examination of azulene derivatives in biological contexts.

Main Results:

  • Azulene's fluorescence is often dependent on protonation, leading to "turn-on" sensors.
Keywords:
azulenebioimagingchemodosimeterchemosensordosimeterfluorescencesensor

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  • Fluorescent azulenes are valuable tools for biological sensing and imaging.

    • Conclusions:

    • Azulene's unique photophysical properties make it a versatile fluorophore.
    • Further development of azulene-based sensors holds promise for various applications.