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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

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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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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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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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Photoluminescence: Fluorescence and Phosphorescence01:23

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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.
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Inorganic Building Unit Isomerization Engineering for Multicolor Room Temperature Phosphorescence.

Wen-Tao Song1, Bo-Lun Zhang2, Lei Miao1

  • 1School of Chemistry, Dalian University of Technology, Dalian, 116024, China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 12, 2025
PubMed
Summary

Researchers developed a new strategy to control the color of room temperature phosphorescence (RTP) materials by engineering inorganic building units. This method allows for tunable cyan to red emissions and potential applications in information encryption.

Keywords:
charge transfercoordination polymerhost‐guest dopinginorganic building unitroom temperature phosphorescence

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Area of Science:

  • Materials Science
  • Chemistry
  • Solid-State Physics

Background:

  • Room temperature phosphorescence (RTP) materials are crucial for various applications.
  • Controlling the emission color of RTP materials remains a significant challenge in current research.

Purpose of the Study:

  • To propose a facile strategy for regulating RTP color using "inorganic building unit (IBU) isomerization engineering."
  • To explore the potential of coordination polymers (CPs) as RTP materials with tunable colors.

Main Methods:

  • Synthesized four coordination polymers (CPs) with varying structures from the same raw material.
  • Investigated the relationship between IBU isomerization, charge transfer (CT) processes, and RTP emission.
  • Prepared color-tunable doped RTP materials using calcium formate and CP-type guest components.

Main Results:

  • Achieved a wide-range of RTP colors (505-612 nm) from cyan to red by altering CP packing structures.
  • Demonstrated that IBU isomerization effectively tunes CT processes, leading to diverse RTP emissions.
  • Observed excitation/concentration/time-dependent RTP emission in doped materials.

Conclusions:

  • IBU isomerization engineering provides an effective method for facile RTP color regulation.
  • CP-type guest components show great potential for developing doped RTP materials.
  • The developed materials show promise for multi-level information encryption applications.