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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

693
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

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Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
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Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

1.1K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Related Experiment Video

Updated: Nov 15, 2025

Low-energy Cathodoluminescence for OxyNitride Phosphors
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Recent Advances in Clusteroluminescence.

Zhaoyu Wang1, Haoke Zhang2, Siqi Li3

  • 1Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.

Topics in Current Chemistry (Cham)
|March 3, 2021
PubMed
Summary
This summary is machine-generated.

Clusteroluminescence, light emission from clustered molecules, is increasingly studied. Recent advances reveal new mechanisms, room-temperature phosphorescence, and extended wavelengths for diverse applications.

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Area of Science:

  • Materials Science
  • Photophysics
  • Organic Chemistry

Background:

  • Clusteroluminescence involves light emission from aggregated non-conjugated electron-rich units.
  • First observed in poly(amido amine) (PAMAM) dendrimers, it's a growing research area.
  • Recent studies focus on photophysical properties and underlying mechanisms.

Purpose of the Study:

  • To review the development of various clusteroluminogens.
  • To highlight recent advancements in clusteroluminescence research.
  • To showcase diverse applications of clusteroluminogens.

Main Methods:

  • Review of existing literature on clusteroluminescence.
  • Analysis of mechanistic studies and photophysical properties.
  • Exploration of applications in different fields.

Main Results:

  • Introduction to different types of clusteroluminogens.
  • Discussion of mechanistic insights and room-temperature phosphorescence.
  • Demonstration of extended emission wavelengths and practical applications.

Conclusions:

  • Clusteroluminescence offers unique light-emitting properties.
  • Earth-abundant, biocompatible, and biodegradable clusteroluminogens show great promise.
  • Future applications are envisioned across various scientific domains.