resumo
Metal-organic frameworks (MOFs) exhibiting perovskite-like structures have become a significant object of study due to their structural, phonon, and optical features. Temperature-dependent luminescence is a valuable property within the context of luminescence thermometry. Herein, we report structural and spectroscopic studies of a series of [DMA](M1-xCrx)-Cr-II(HCOO)(3), where DMA = dimethylammonium cation, x = 0, 0.01, 0.03, and 0.05, while M-II = Zn2+, Mn2+, Mg2+, Co2+, and Ni2+. The influence of the metal type on crystal field strength (Dq/B) is determined with diffuse reflectance spectroscopy. Additionally, the estimation of the crystal field strength is performed with the analysis of the metal-oxygen distance. Conducted Raman, IR, and XRD analysis provide information on the relationship between structural properties and chemical composition. To investigate the thermometric potential of obtained materials the temperature-dependent luminescence measurements (80-300 K) are implemented. Obtained results show the extraordinary potential of hybrid compounds for luminescence thermometry (relative senitivity (S-r)up to 2.49%center dot K-1 at 160 K). The exemplary system based on luminescent thermometers for remote temperature measurements in dynamic systems has been additionally proposed. The presented results show a significant relationship between the surrounding temperature, chemical composition, and spectroscopic properties, allowing to design of a temperature sensing model for time-resolved measurements.
palavras-chave
METAL-ORGANIC FRAMEWORKS; PHASE-TRANSITIONS; OPTICAL THERMOMETER; CR3+; LUMINESCENCE; RAMAN; ENERGY; FIELD
categoria
Materials Science; Optics
autores
Kabanski, A; Ptak, M; Carlos, LD; Stefanska, D
nossos autores
Luís Carlos
Professor CatedráticoProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
This research was supported by the National Science Centre (NCN) in Poland under project SONATA 16 no. 2020/39/D/ST5/01289 and partially developed under the project CICECO-Aveiro Institute of Materials UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by funds through the FCT/MEC (PID-DAC).