A dysprosium(III)-based triple helical-like complex as a turn-on/off fluorescence sensor for Al(III) and 4,5-dimethyl-2-nitroaniline

Yi Yin; Rong Luo; Wen Wang; Rui Wang; Nan Jiang; Peng Chen; Hai-Jun Yu; Shuang-Yu Bi; Feng Shao

doi:10.1039/d3dt03546h

A dysprosium(III)-based triple helical-like complex as a turn-on/off fluorescence sensor for Al(III) and 4,5-dimethyl-2-nitroaniline

Dalton Trans. 2024 Mar 19;53(12):5544-5552. doi: 10.1039/d3dt03546h.

Authors

Yi Yin¹, Rong Luo¹, Wen Wang¹, Rui Wang¹, Nan Jiang¹, Peng Chen¹, Hai-Jun Yu¹, Shuang-Yu Bi², Feng Shao¹

Affiliations

¹ Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China. feng.shao@ouc.edu.cn.
² State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China.

PMID: 38426260
DOI: 10.1039/d3dt03546h

Abstract

A novel triple helical-like complex [Dy₂K₂L₃(NO₃)₂]·3DMF (1) based on a designed Schiff base N'¹,N'³-bis((E)-3-ethoxy-2-hydroxybenzylidene)-malonohydrazide (H₄L) was synthesized with good chemical and thermal stabilities. Single-crystal X-ray structural analysis showed that 1 presents a tetranuclear triple helical-like structure via the coordination mode of Dy : K : L with 2 : 2 : 3 stoichiometry. Fluorescence measurements showed that 1@EtOH has excellent fluorescence turn-on/off response ability for aluminium ions and 4,5-dimethyl-2-nitroaniline (DMNA) with outstanding selectivity, sensitivity, and anti-interference ability. The calculated limit of detection (LOD) values for 1@EtOH to Al³⁺ and DMNA were found to be 0.53 and 3.33 μM, respectively. Density functional theory (DFT) calculation showed that the fluorescence response mechanism can be explained by the photoinduced electron transfer (PET) mechanism; meanwhile, the inner filter effect (IFE) of DMNA can also affect the emission of 1@EtOH.