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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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Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
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Nonconjugated Polyesters Emitting Full-Color Clusteroluminescence.

Bo Chu1, Haoke Zhang1, Xinghong Zhang1

  • 1State Key Laboratory of Biobased Transportation Fuel Technology, International Research Center for X Polymers, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310058, China.

Accounts of Chemical Research
|June 6, 2025
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Summary
This summary is machine-generated.

Researchers developed novel nonconjugated polyesters for high-efficiency full-color clusteroluminescence (CL) using through-space electronic interactions. This approach offers a new paradigm for designing advanced CL polymers with tunable properties and improved biocompatibility.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Photophysics

Background:

  • Conventional photoluminescent polymers often use classical luminophores, posing risks like biotoxicity and poor processability.
  • Emerging clusteroluminescence (CL) in heteroatom-rich nonconjugated polymers offers advantages such as low cost, biocompatibility, and improved processability.
  • Developing full-color CL polymers and understanding their mechanisms are crucial for advancing chemistry, biology, and material science.

Purpose of the Study:

  • To summarize research on nonconjugated polyesters for high-efficiency full-color CL.
  • To explore structure-driven through-space (n, π*) interaction (TSI-(n, π*)) as a new design strategy for CL polymers.
  • To provide deeper insights into CL mechanisms, molecular design, and structure-luminescence relationships in polyesters.

Main Methods:

  • Utilized polymerization-induced emission (PIE) strategy to synthesize luminescent polyesters from nonluminescent monomers.
  • Investigated structure-luminescence relationships by altering polyester hierarchical structures (segmental, conformational, end-group, electronic bridge).
  • Analyzed subnanometer TSI-(n, π*) and photomodulated through-space electronic coupling for CL mechanism elucidation.

Main Results:

  • Achieved high-efficiency full-color CL spanning 400-800 nm (blue to near-infrared) in nonconjugated polyesters.
  • Demonstrated tunable CL properties (wavelength and efficiency) by manipulating TSI-(n, π*) through hierarchical structural control.
  • Established a new paradigm for designing nonconjugated CL polymers via structure-driven TSI-(n, π*).

Conclusions:

  • Nonconjugated polyesters offer a promising platform for developing advanced CL materials.
  • TSI-(n, π*) is a key mechanism for achieving high-efficiency, full-color emission in these polymers.
  • Further development of CL polyesters holds potential for diverse applications in chemistry, biology, and material science.