文献类型：期刊文献

英文题名：Ultra-wide range dual-mode sensor based on ternary phase diagram guided ZIF-8 for ammonium assay

作者：Shi, Wen-Juan[1,2]; Lv, Chun-Mei[1,2]; Bu, Xing-Sheng[1,2]; Li, Qiu-Yang[1,2]; Hou, Yong-Sheng[1]; Shi, Xiao-Feng[2,3]; Wang, Wei-Feng[1,2]; Yang, Jun-Li[1]

第一作者：Shi, Wen-Juan

机构：[1] CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences [CAS], Lanzhou, 730000, China; [2] School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, China; [3] Institute of Pharmaceutical research, Gansu Academy of Medical Sciences, Lanzhou, 730000, China

第一机构：CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences [CAS], Lanzhou, 730000, China

通信机构：[1]CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, 730000, China;[1]CAS Key Laboratory of Chemistry of Northwestern Plant Resources, Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Lanzhou, 730000, China;[2]School of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, China|[10735]甘肃中医药大学;

年份：2026

卷号：193

期号：1

外文期刊名：Microchimica Acta

收录：EI(收录号：20255019669263);Scopus(收录号：2-s2.0-105023912464)

语种：英文

外文关键词：Fluorescence - Phase diagrams - Signal detection - Ternary systems

摘要：A dual-mode sensor with a wide concentration range for NH4+ detection was presented based on the confined effect of zeolitic imidazole framework-8 (ZIF-8) combined with o-phthalaldehyde (OPA). OPA@ZIF-8 was ingeniously designed by the ternary phase diagram to obtain the best detection performance. Benefiting from the confined effect of ZIF-8, OPA actively collided and reacted with NH4+. This sensor can realize the wide concentration ranging over four orders of magnitudes for NH4+ determination. The low concentrations of NH4+ triggered a significant fluorescent response with a detection limit as low as 0.054 μM, while the high concentrations can produce a colorimetric signal from colorless to blue. The mechanism study showed that the confined effect of ZIF-8 effectively accelerates the reaction to reach equilibrium, addressing the issue of poor stability of reaction between OPA and NH4+ reaction product. In the actual sample detection, the recovery reached 91.1%-97.9%, verifying the reliability of this method. This study not only provides a feasible method for detecting NH4+ in various environments, but also offers insights into the research of sensing systems under the confinement effect regulation of nanomaterials. ? The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature 2025.