Luminescent Lanthanide Metal Organic Frameworks as Chemosensing Platforms towards Agrochemicals and Cations

Sensors

Maríados Santos Afonso¹  Germán E. Gomez²  Federico Roncaroli³  Galo J. A. A. Soler-Illia⁴  Héctor A. Baldoni⁴ 

[1] Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, Ciudad Universitaria Pabellón II 3er Piso, Intendente Guiraldes, Ciudad Autónoma de Buenos Aires C1428EGA, Argentina;Gerencia Química, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Avenida General Paz 1499, 1650, San Martin, Buenos Aires, Argentina;Instituto de Matemática Aplicada de San Luis (IMASL), Área de Química General e Inorgánica , Facultad de Química, Bioquímica y Farmacia, Chacabuco y Pedernera, Universidad Nacional de San Luis, San Luis 5700, Argentina;Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE)-CONICET, Ciudad Universitaria Pabellón II 3er Piso, Intendente Guiraldes, Ciudad Autónoma de Buenos Aires C1428EGA, Argentina;

关键词: metal organic frameworks (MOFs);    sensing;    luminescence;    lanthanides;   

DOI  :  10.3390/s19051260

来源: DOAJ

【 摘 要 】

Since the first studies of luminescent sensors based on metal organic frameworks (MOFs) about ten years ago, there has been an increased interest in the development of specific sensors towards cations, anions, explosives, small molecules, solvents, etc. However, the detection of toxic compounds related to agro-industry and nuclear activity is noticeably scarce or even non-existent. In this work, we report the synthesis and characterization of luminescent lanthanide-based MOFs (Ln-MOFs) with diverse crystalline architectures obtained by solvothermal methods. The luminescent properties of the lanthanides, and the hypersensitive transitions of Eu3+ (5D0→7F2) and Tb3+ (5D4→7F5) intrinsically found in the obtained MOFs in particular, were evaluated and employed as chemical sensors for agrochemical and cationic species. The limit of detection (LOD) of Tb-PSA MOFs (PSA = 2-phenylsuccinate) was 2.9 ppm for [UO22+] and 5.6 ppm for [Cu2+]. The variations of the 4f–4f spectral lines and the quenching/enhancement effects of the Ln-MOFs in the presence of the analytes were fully analyzed and discussed in terms of a combinatorial “host–guest” vibrational and “in-silico” interaction studies.

【 授权许可】

Unknown