zhpsЖурнал прикладной спектроскопииZhurnal Prikladnoii Spektroskopii0514-7506B. I. Stepanov Institute of Physics of the National Academy of Scienceszhps-987Research ArticleАННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙABSTRACTS ENGLISH-LANGUAGE ARTICLESДвухканальный гибкий хемосенсор для флуорогенного определения иона меди в полуводной средеDual-Channel More Flexible Salamo-Like Chemosensor for Fluorogenic Sensing of Copper Ion in Semi-Aqueous MediumLiR.-Y.LiR.-Y.

Ланьчжоу, Ганьсу

Lanzhou, Gansu

GaoS.-X.GaoS.-X.

Ланьчжоу, Ганьсу

Lanzhou, Gansu

LiuCh.LiuCh.

Ланьчжоу, Ганьсу

Lanzhou, Gansu

DongW.-K.DongW.-K.

Ланьчжоу, Ганьсу

Lanzhou, Gansu

dongwk@126.comDingY.-J.DingY.-J.

Аньхой

Wuhu, Anhui

dyj@ahpu.edu.cnШкола химической и биологической инженерии Университета Ланьчжоу ЦзяотунSchool of Chemical and Biological Engineering at Lanzhou Jiaotong UniversityШкола экологического и муниципального проектирования Университета Ланьчжоу ЦзяотунSchool of Environmental and Municipal Engineering at Lanzhou Jiaotong UniversityКолледж биохимической инженерии Аньхойского политехнического университетаCollege of Biochemical Engineering at Anhui Polytechnic University202204022022891137145Copyright © Li R., Gao S., Liu C., Dong W., Ding Y., 20222022Li R., Gao S., Liu C., Dong W., Ding Y.Li R., Gao S., Liu C., Dong W., Ding Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://zhps.ejournal.by/jour/article/view/987

С использованием УФ-видимой и флуоресцентной спектроскопии изучены оптические свойства симметричного саламоподобного химического зонда (H2CS) Cu2+ в растворе EtOH/H2O (1:1, об./об.). Координация Cu2+ и H2CS приводит к затуханию флуоресценции из-за парамагнитной природы ионов Cu2+. Константа связывания Cu2+ с сенсором H2CS 1.17 . 1011 M–1, предел обнаружения 5.3 . 10–8 M. При добавлении ионов Cu2+ УФ-видимые спектры изменяются, очевидно, из-за переноса электронов от сенсора на металлическую связь, появляется новая полоса поглощения при 372 нм. При добавлении раствора этилендиаминтетрауксусной кислоты (ЭДТА) к раствору H2CS-Cu2+ константа связывания с ЭДТА возрастает, что приводит к высвобождению свободной молекулы сенсора и достижению затухания флуоресценции.

The optical properties of the symmetric salamo-like chemical probe (H2CS) of Cu2+ were studied in EtOH/H2O (1:1, V/V) solution by UV-Vis and fluorescence spectroscopy. In the fluorescence spectrum, the coordination of Cu2+ with H2CS results in fluorescence quenching owing to the paramagnetic nature of Cu2+ ions. The binding constant of Cu2+ to the H2CS sensor was calculated as 1.17×1011 M–1 and LOD was obtained as 5.3×10–8 M. When Cu2+ ions were added, the UV-Vis spectra changed, obviously due to the electron transfer from sensor to metal bond, and a new absorption band appeared at 372 nm. When the ethylenediaminetetraacetic acid (EDTA) solution was added to the H2CS-Cu2+ solution, causing a large binding constant, with EDTA releasing the free sensor molecule and finally achieving a fluorescence shutdown phenomenon.

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The authors declare that there are no conflicts of interest present.