

FOLLOWUS
a.College of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
b.Québec Center for Functional Materials, Department of Chemistry, Université de Sherbrooke, Sherbrooke QC J1K2R1, Canada
xzkong@ujn.edu.cn
Received:30 April 2022,
Revised:2022-6-5,
Accepted:13 June 2022,
Online First:26 September 2022,
Published:01 January 2023
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Jiang, X.; Wang, Q.; Li, B.; Li, S.; Kong, X. Z. Fluorescence behavior and emission mechanisms of poly(ethylene succinamide) and its applications in Fe3+ detection and data encryption. Chinese J. Polym. Sci. 2023, 41, 129–142 DOI: 10.1007/s10118-022-2826-x.
Xubao Jiang, Qinghui Wang, Bin Li, et al. Fluorescence Behavior and Emission Mechanisms of Poly(ethylene succinamide) and Its Applications in Fe3+ Detection and Data Encryption[J]. Chinese Journal of Polymer Science, 2023, 41(1): 129-142. DOI: 10.1007/s10118-022-2826-x.
Jiang, X.; Wang, Q.; Li, B.; Li, S.; Kong, X. Z. Fluorescence behavior and emission mechanisms of poly(ethylene succinamide) and its applications in Fe3+ detection and data encryption. Chinese J. Polym. Sci. 2023, 41, 129–142 DOI: 10.1007/s10118-022-2826-x. DOI:
Xubao Jiang, Qinghui Wang, Bin Li, et al. Fluorescence Behavior and Emission Mechanisms of Poly(ethylene succinamide) and Its Applications in Fe3+ Detection and Data Encryption[J]. Chinese Journal of Polymer Science, 2023, 41(1): 129-142. DOI: 10.1007/s10118-022-2826-x. DOI:
Poly(ethylene succinamide)
PA24
is synthesized through solid phase polycondensation. PA24 is highly emissive as solid and in its solution
and emission mechanism is ascribed to cluster-triggered emission (CTE). Red-shift emissions are occurring with
λ
ex
≤270 and ≥320 nm. Blue-shift is observed with 270
<
λ
ex
<
320 nm
and is interpreted through FRET effect.
Conventional fluorescent polymers are featured by large conjugation structures. In contrast
a new class of fluorescent polymers without any conjugations is gaining great interest in immerging applications. Polyamide is a typical member of the conjugation-free fluorescent polymers. However
studies on their electrophotonic property are hardly available
although widely used in many fields. Herein
poly(ethylene succinamide)
PA24
is synthesized; its chemical structure confirmed through multiple techniques (NMR
FTIR
XRD
etc
.). PA24 is highly emissive as solid and in its solution at room temperature
and the emission is excitation and concentration dependant
with an unusual blue shift under excitation from 270 nm to 320 nm
a hardly observed phenomenon for all fluorescent polymers. Quite similar emission behavior is also observed under cryogenic condition at 77 K. Its emission behavior is thoroughly studied; the ephemeral emission blue-shift is interpreted through Förster resonance energy transfer. Based on its structures
the emission mechanism is ascribed to cluster-triggered emission
elucidated from multi-analyses (NMR
FTIR
UV absorbance and DLS). In presence of a dozen of competitive metal ions
PA24 emission at 450 nm is selectively quenched by Fe
3+
. PA24 is used as probe for Fe
3+
and H
2
O
2
detections and in data encryption. Therefore
this work provides a novel face of polyamide with great potential applications as sensors in different fields.
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