

FOLLOWUS
a.Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
b.College of Traffic Civil Engineering, Shandong Jiaotong University, Jinan 250023, China
chm_kuangx@ujn.edu.cn (X.K.)
kuangr1985@foxmail.com (R.K.)
Received:09 June 2025,
Accepted:02 August 2025,
Online First:16 October 2025,
Published:05 November 2025
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Ruan, Y. Q.; Kuang, X.; Kuang, R. Metal-organic framework/polyimide-electrochemiluminescence sensor for enantioselective detection of histidine. Chinese J. Polym. Sci. 2025, 43, 2110–2117
Ye-Qian Ruan, Xuan Kuang, Rui Kuang. Metal-Organic Framework/Polyimide-Electrochemiluminescence Sensor for Enantioselective Detection of Histidine[J]. Chinese Journal of Polymer Science, 2025, 43(11): 2110-2117.
Ruan, Y. Q.; Kuang, X.; Kuang, R. Metal-organic framework/polyimide-electrochemiluminescence sensor for enantioselective detection of histidine. Chinese J. Polym. Sci. 2025, 43, 2110–2117 DOI: 10.1007/s10118-025-3425-4.
Ye-Qian Ruan, Xuan Kuang, Rui Kuang. Metal-Organic Framework/Polyimide-Electrochemiluminescence Sensor for Enantioselective Detection of Histidine[J]. Chinese Journal of Polymer Science, 2025, 43(11): 2110-2117. DOI: 10.1007/s10118-025-3425-4.
This study introduces a novel chiral MOF/PI-ECL sensor
utilizing a linear polyimide chain and ferrocene as key components for highly sensitive and enantioselective detection of histidine. The sensor demonstrates an impressive LOD of 8 μM and excellent recovery rates in real samples.
In this study
a novel linear polyimide chain (PTCDA-DCH) was used as an electrochemiluminescence (ECL) emitter
employing a chiral metal-organic framework (MOF) (Zn-Dcam-dabco) as the chiral selector and ferrocene (Fc) as a quencher to construct a chiral sensor for detecting histidine (His) enantiomers. Competitive interactions between Fc and His induce partial Fc desorption from the sensor surface
leading to ECL signal recovery. Differential Fc release due to the distinct binding affinities of Zn-Dcam-dabco for His enantiomers enabled precise chiral discrimination. Notably
the sensor achieved the quantitative detection of His enantiomers with an limits of detection (LOD) of 8 μmol/L. Furthermore
the sensor demonstrated excellent recovery rates of 98.0%–104% for l-histidine (L-His) and 92.0%–95.9% for D-His in spiked milk samples
validating its reliability for real-sample analysis. This study provides a promising platform for ECL-based chiral recognition
bioanalysis
and the rapid assessment of amino acids in food products.
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