Multifunctional
Lanthanide Metal–Organic Frameworks
Act as Fluorescent Probes for the Detection of Cr2O72–, Fe3+, and TNP, White Light-Emitting
Diodes, and Luminescence Thermometers
Posted on 2025-02-04 - 22:13
Two basically isostructural lanthanide-based metal–organic
frameworks (Ln-MOFs), {[Eu(dptz)(H2O)2]Cl·3H2O}n (JLNU-10-Eu, JLNU = Jilin Normal
University) and {[Tb(dptz)(NO3)(H2O)]·7H2O}n (JLNU-10-Tb),
have been successfully synthesized by employing 3-(3,5-dicarboxylphenyl)-5-(pyrid-2-yl)-1H-1,2,4-triazole (H2dptz) as a flexible carboxylic
acid ligand through solvothermal reactions. Single-crystal structural
studies on Ln-MOFs manifested that the compounds have a two-dimensional
(2D) layered structure. Furthermore, fluorescence sensing experiments
indicated that JLNU-10-Eu and JLNU-10-Tb had significant fluorescence quenching effects on Cr2O72–, Fe3+, and TNP. It should
be noted that the KSV value of JLNU-10-Eu in sensing Fe3+ could reach 7.36 × 103, and the limit of detection (LOD) was 0.57. The luminescence quenching
mechanism is discussed in detail through some relevant experiments.
Additionally, a series of Ln-MOFs, JLNU-10-EuxTb1–x (x = 0.9, 0.8, 0.7, 0.6,
0.5, 0.4, 0.3, 0.2, and 0.1), have been obtained by simply regulating
the molar ratio of Eu3+ and Tb3+. Particularly, JLNU-10-Eu0.8Tb0.2 can achieve white light emission at an excitation
wavelength of 300 nm. The CIE coordinates are (0.316, 0.332), which
are very approximate to ideal white light. JLNU-10-Eu0.2Tb0.8 as a luminescence thermometer exhibits good linearity over the temperature
range of 303–373 K with a high sensitivity of 4.1% K–1 at 373 K. The construction of multifunctional Ln-MOFs displays prospective
applications in fluorescent probes, white light-emitting diodes, and
luminescence thermometers.
CITE THIS COLLECTION
DataCiteDataCite
No result found
Zhang, Shu-Ran; Zhang, Wei-Tao; Li, Xiao; Xu, Guang-Juan; Xie, Wei; Xu, Yan-Hong; et al. (2025). Multifunctional
Lanthanide Metal–Organic Frameworks
Act as Fluorescent Probes for the Detection of Cr2O72–, Fe3+, and TNP, White Light-Emitting
Diodes, and Luminescence Thermometers. ACS Publications. Collection. https://doi.org/10.1021/acs.inorgchem.4c05262