Polyarylether-based COFs coordinated by Tb³⁺ for the fluorescent detection of anthrax-biomarker dipicolinic acid

Abstract

In this study, a rare-earth hybrid luminescent material (lanthanide@COF) was constructed for the detection of a biomarker for anthrax (dipicolinic acid, DPA).

Novel Olefin-Linked Covalent Organic Framework with Multifunctional Group Modification for the Fluorescence/Smartphone Detection of Uranyl Ion

“…However, the LUMO of GC-TFPB-AO (−4.69 eV) is lower than that of UO 2 2+ (−4.24 eV), which implies that the excited-state electrons in GC-TFPB-AO are not conducive to transferring to the LUMO level of UO 2 2+ , thus precluding the occurrence of PET between them (Figure d) . Moreover, the HOMO of GC-TFPB-AO is slightly higher than the HOMO level of UO 2 2+ , suggesting that the electrons in the HOMO level of GC-TFPB-AO can be transferred to UO 2 2+ by non-photo-excited means, which can lead to the ICT quenching. − …”

Construction of Porphyrin-Based Bimetallic Nanomaterials with Photocatalytic Properties

“…Two smaller Eu 3d 5/2 and Eu 3d 3/2 peaks were observed at 1125.2 eV and 1155.8 eV, respectively, attributed to the Eu 2+ oxidation state [46,47]. The corresponding O 1s XPS profiles were deconvoluted into three peaks of 531.6 eV, 532.1 eV, and 533.6 eV, among which the peak at 533.6 eV was associated with C-OH bonds, the peak at 532.6 eV was ascribed to Tb-O bonds, and the peak located at 531.6 eV came from Eu-O bonds [48,49]. The above results all indicated the successful preparation of Tb-Eu-TCPP.…”

MXene quantum dots for ratiometric fluorescence detection of a Bacillus anthracis biomarker

“…Fluorescence analysis technology has received tremendous attention in disease diagnosis, food inspection, and environmental monitoring due to the merits of high sensitivity, high reproducibility, simplicity and easy integration. 8,9 A large number of fluorescent probes have been reported for DPA detection, such as lanthanide ionbased metal-organic frameworks, 1,10 boron carbon oxynitride quantum dots, 11 carbon dots, 12 covalent organic frameworks, 13 SiO 2 nanoparticles, 14 europium-organic gels nanosheets, 15 and so on. Recently, ratiometric fluorescence methods relying on a reference signal and a response signal have been popular due to their self-calibration, higher accuracy, higher precision, and visualization effect.…”