Details
| Original language | English |
|---|---|
| Article number | 1908 |
| Journal | Polymers |
| Volume | 17 |
| Issue number | 14 |
| Publication status | Published - 10 Jul 2025 |
Abstract
A key discovery of this study is the strong correlation (r = 0.96) between excitation and emission maxima across chemically distinct clusteroluminogens. All 157 evaluated peaks fall along a single regression line (Ex = 0.844 Em − 12 nm), a pattern that was not valid for conventional fluorophores. This suggests a general principle of clusteroluminescence. We show that in lignocellulosic materials, peak positions reflect chemical interactions: isolated lignin and cellulose showed short excitation and emission wavelengths, while native wood exhibited longer wavelengths. Fungal or photoinduced degradation led to a further red-shift. These effects are attributed to increased molecular heterogeneity, reducing the effective energy gap within the lignocellulosic complex. We conclude that the spectral position reflects the degree of molecular interaction rather than the chemical structure of individual molecules. It may serve as a novel analytical parameter for assessing purity and degradation in a wide range of polymers.
Keywords
- clusteroluminescence, excitation-dependent emission, excitation-emission correlation, polymer luminescence, red-shift, through-space interaction, wood fluorescence
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- Polymers and Plastics
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In: Polymers, Vol. 17, No. 14, 1908, 10.07.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A Wavelength Rule for the Analysis of Clusteroluminescence
AU - Peters, Frank B.
AU - Rapp, Andreas O.
N1 - Publisher Copyright: © 2025 by the authors.
PY - 2025/7/10
Y1 - 2025/7/10
N2 - A key discovery of this study is the strong correlation (r = 0.96) between excitation and emission maxima across chemically distinct clusteroluminogens. All 157 evaluated peaks fall along a single regression line (Ex = 0.844 Em − 12 nm), a pattern that was not valid for conventional fluorophores. This suggests a general principle of clusteroluminescence. We show that in lignocellulosic materials, peak positions reflect chemical interactions: isolated lignin and cellulose showed short excitation and emission wavelengths, while native wood exhibited longer wavelengths. Fungal or photoinduced degradation led to a further red-shift. These effects are attributed to increased molecular heterogeneity, reducing the effective energy gap within the lignocellulosic complex. We conclude that the spectral position reflects the degree of molecular interaction rather than the chemical structure of individual molecules. It may serve as a novel analytical parameter for assessing purity and degradation in a wide range of polymers.
AB - A key discovery of this study is the strong correlation (r = 0.96) between excitation and emission maxima across chemically distinct clusteroluminogens. All 157 evaluated peaks fall along a single regression line (Ex = 0.844 Em − 12 nm), a pattern that was not valid for conventional fluorophores. This suggests a general principle of clusteroluminescence. We show that in lignocellulosic materials, peak positions reflect chemical interactions: isolated lignin and cellulose showed short excitation and emission wavelengths, while native wood exhibited longer wavelengths. Fungal or photoinduced degradation led to a further red-shift. These effects are attributed to increased molecular heterogeneity, reducing the effective energy gap within the lignocellulosic complex. We conclude that the spectral position reflects the degree of molecular interaction rather than the chemical structure of individual molecules. It may serve as a novel analytical parameter for assessing purity and degradation in a wide range of polymers.
KW - clusteroluminescence
KW - excitation-dependent emission
KW - excitation-emission correlation
KW - polymer luminescence
KW - red-shift
KW - through-space interaction
KW - wood fluorescence
UR - http://www.scopus.com/inward/record.url?scp=105011414752&partnerID=8YFLogxK
U2 - 10.3390/polym17141908
DO - 10.3390/polym17141908
M3 - Article
AN - SCOPUS:105011414752
VL - 17
JO - Polymers
JF - Polymers
SN - 2073-4360
IS - 14
M1 - 1908
ER -