Luminescent materials of covalent grafting lanthanide complexes to the synthetic clays

Tough, Self-Healing, and UV Light-Switchable Luminescent Hydrogels with Reversible Stimuli-Responsive Properties for Cu2+

“…Infrared (IR) spectra in Figure S1 (Supporting Information) and thermogravimetric curves in Figure S2 were recorded to supply structural characterization data for the LHs. The absorption band at 1618 and 1430 cm –1 were attributed to the pyridine ring and the −COO group in Na 3 [Ln(dpa) 3 ], respectively. , Band at 1000 cm –1 was assigned to the absorption of Si–O–Si of laponite. , These peaks have no obvious movement in the IR spectrum of LHs, indicating that these luminescent centers are only adsorbed on the inorganic matrix. Meanwhile, absorption peaks at 2920 and 2873 cm –1 were assigned to the stretching vibration of PU in LHs.…”

“…8,37 Band at 1000 cm −1 was assigned to the absorption of Si−O−Si of laponite. 38,39 These peaks have no obvious movement in the IR spectrum of LHs, indicating that these luminescent centers are only adsorbed on the inorganic matrix. Meanwhile, absorption peaks at 2920 and 2873 cm −1 were assigned to the stretching vibration of PU in LHs.…”

“…The absorption band at 1618 and 1430 cm −1were attributed to the pyridine ring and the −COO group in Na 3 [Ln(dpa) 3 ], respectively 8,37. Band at 1000 cm −1 was assigned to the absorption of Si−O−Si of laponite 38,39. These peaks have no obvious movement in the IR spectrum of LHs, indicating that these luminescent centers are only adsorbed on the inorganic matrix.…”

Research Progress on the Modification Methods of Clay Minerals

“…Some researchers then used 3-mercaptopropyltrimethoxysilane (MPS) with sulfhydryl groups to modify bentonite in the presence of sodium silicate to form siloxane bonds, and successfully introduced sulfhydryl groups into the interlayer and surface of bentonite, the mechanism of which is shown in Figure 3 (Dong & Xia, 2020). Ma et al further proposed the reaction of the terminal triethoxy groups of triethoxymethylsilyl ligands with the hydroxyl groups on the clay surface by reacting the lanthanide A method for covalent grafting of lanthanide complexes onto clays was further proposed by Ma, Yang, Song, et al (2019). Table 1 summarizes the reagents and methods commonly used for surface hydroxyl grafting modification of montmorillonite.…”

Red-Emitting Hybrid Based on Eu3+-dbm Complex Anchored on Silica Nanoparticles Surface by Carboxylic Acid for Biomarker Application

“…Such shortcomings have been minimized over the immobilization of complexes in inorganic nanoparticles, for example, silica (SiO 2 ) [12,17,18], clays [19], oxides [20], metals [21] or core-shell systems [22], making of these hybrid materials processed as stable colloidal suspensions displaying desirable luminescence and improved photostability. Moreover, the immobilization of the complex on the surface allows the nanoparticle internalization by cells, introducing a considerable number of luminescent centers within them, decreasing the dosage necessary to get first-rate clinical images.…”