An ionic luminescent complex of europium(III) and its fluorescence sensing performance for amine VOCs

• Published in: Journal of molecular structure Vol. 1319; p. 139595
• Main Authors: Dai, Ding-Qiu, Song, Li, Wu, Jin-Tao, Jin, Ding-Fen, Jin, Hong-Xiao, Shen, Hang-Yan, Du, Xin-Yang, Zhang, Ying-Ying, Chai, Wen-Xiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.01.2025
• Subjects: Cyclohexylamine sensing; Fluorescent probe; Ionic complex of europium(III); Paper-based sensor; Photoluminescence; Cyclohexylamine sensing; Ionic complex of europium(III); Paper-based sensor; Photoluminescence; Fluorescent probe
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2024.139595

•An ionic complex (MV) [Eu(NTA)4)]2 (1) has been synthesized and characterized.•Paper-based fluorescence sensor was prepared based on this complex probe (1).•The sensor exhibits rapid quenching sensing behavior of PL emission.•The T90 value of detection for cyclohexylamine sensing is as low as 30 s.•The limit of detection for cyclohexylamine sensing is as low as 3 ppm. A new fluorescent amine probe of ionic complex (MV) [Eu(NTA)4)]2 (1) (MV = Methyl viologen, NTA = 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione) has been designed and synthesized. Single-crystal X-ray diffraction shows that 1 crystallizes with four independent mononuclear cationic complexes, solvated by two hexane, one dichloromethane, one alcohol and three water molecules counterbalanced by two MV2+ cations (1•hexane•0.5DCM•0.5EtOH•1·5H2O). Both in solid state and in doped films, this probe material exhibits strong red fluorescence emission dominated by 5D0→7F2 transition of Eu3+ ions. On the basis of this complex fluorescence probe, a paper-based thin film fluorescence sensor with fast and sensitive sensing performance to cyclohexylamine (CYA) was developed by PMMA composite preparation process. When the paper based sensor is placed in an atmosphere containing CYA vapor, its photoluminescence (PL) intensity decreases rapidly, showing a typical fast quenching fluorescence sensor. [Display omitted]