Overall
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received March 18, 2026
Accepted July 18, 2026
Available online November 25, 2026
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most Cited
Electrospun Fibers for Colorimetric Detection of Volatile Organic Compounds via Polyfluorene–Quinoxaline Copolymer Photoproperties Change
https://doi.org/10.1007/s11814-026-00795-z
Abstract
We report a volatile organic compound (VOC) sensing platform based on electrospun nanofibers of a single-component
PFO–quinoxaline donor–acceptor copolymer, in which donor and acceptor units are covalently integrated within one conjugated
chain. Unlike multicomponent systems governed by intermolecular geometry, this design enables VOC-responsive
modulation of intrinsically defined excited-state energy flow and charge-transfer photophysics. By tuning the PFO/QX
composition, the copolymer showed systematic changes in emission color and lifetime, reflecting composition-dependent
donor-to-acceptor interactions. When processed into nanoporous electrospun nanofibers, these chain-level photophysical
responses became strongly amplified by enhanced analyte accessibility and nonequilibrium chain packing. In particular,
the 95:5 composition exhibited distinct blue-to-green emission changes, red-shifted photoluminescence, and shortened
fluorescence lifetimes upon exposure to chloroform and tetrahydrofuran vapors, whereas spin-coated films showed only
minor responses. These results show that VOCs can directly perturb the photophysical balance within a molecularly integrated
donor–acceptor copolymer and demonstrate a simple strategy for visually readable optical gas sensing based on
single-chain electronic structure and nanofiber morphology.
