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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: Instrumentation01:25

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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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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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Related Experiment Video

Updated: Jun 5, 2025

Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems
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Room temperature phosphorescent wood hydrogel.

Ruixia Liu1, Hongda Guo1, Shouxin Liu1

  • 1Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin, PR China.

Nature Communications
|December 5, 2024
PubMed
Summary
This summary is machine-generated.

This study introduces a novel wood hydrogel (W-hydrogel) with enhanced mechanical strength and tunable room temperature phosphorescent (RTP) properties. The W-hydrogel demonstrates significant improvements, paving the way for advanced luminescent materials.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Luminescence

Background:

  • Room temperature phosphorescent (RTP) hydrogels offer potential but suffer from poor mechanical properties and non-tunable luminescence.
  • Existing hydrogels have limited tensile strength (<1 MPa), restricting their practical applications in fields requiring robust materials.

Purpose of the Study:

  • To develop a novel wood hydrogel (W-hydrogel) with superior mechanical strength and tunable RTP performance.
  • To investigate the influence of wood components on hydrogel properties and explore stimuli-responsive luminescence.
  • To demonstrate the potential of W-hydrogel in energy transfer processes for advanced luminescent materials.

Main Methods:

  • In situ polymerization of acrylamide within delignified wood to create W-hydrogel.
  • Characterization of mechanical properties (tensile strength) and RTP performance (emission, lifetime).
  • Investigating stimuli-responsive behavior using alternating ethanol and water treatments; exploring energy transfer with Rhodamine B (RhB).

Main Results:

  • W-hydrogel achieved a tensile strength of 38.4 MPa and green RTP emission with a 32.5 ms lifetime.
  • Ethanol treatment enhanced tensile strength to 153.8 MPa and RTP lifetime to 69.7 ms.
  • Mechanical and RTP properties were reversibly switched by alternating ethanol and water treatments; successful red afterglow emission via energy transfer was demonstrated.

Conclusions:

  • The developed W-hydrogel exhibits significantly enhanced mechanical strength and tunable RTP properties, overcoming limitations of conventional hydrogels.
  • The material's performance is switchable via external stimuli (ethanol/water), offering possibilities for smart luminescent devices.
  • W-hydrogel serves as a versatile platform for creating advanced luminescent materials through energy transfer processes.