Synthesis and characterization of terbium(III)-pyromellitic acid (H4L)-1,10-phenanthroline (phen) luminescent complex

Preparation and performance of a novel graphene oxide sheets modified rare-earth luminescence material

“…A SEM image of Eu-PMA-phen/GOSs 5 shows that Eu-PMA-phen was deposited on the surface of GOSs (Fig. 5 The uniform distribution can be explained by the accumulation of Eu-PMA-phen is prevented by the GOSs through the p-p stacking and hydrogen bond interactions. 14,24 Comparison of SEM images of Eu-PMA-phen and Eu-PMA-phen/GOSs 5 can be seen in Fig.…”

“…Various amounts of GOSs (0, 5, 10, 15 mg) were utilized to prepare Eu-PMA-phen/GOSs (dened as Eu-PMA-phen, Eu-PMA-phen/GOSs, 5 Eu-PMA-phen/GOSs, 10 Eu-PMA-phen/ GOSs 15 ). In the process, GOSs obtained by sonication, PMA provided from PMDA, and phen were mixed in a ask, and the pH was adjusted to 6-7, as well as later the system was heated at 60 C for 3 h. Aer allowing it to settle down for at least 12 h, the products were obtained as solid powders through centrifugation, abstersion, and desiccation and are shown in Fig.…”

“…[6][7][8] Aromatic carboxylic acids, as important ligands, have wide applications in luminescence materials because of their strong coordination ability, good thermal stability, and multiconstruction. 4,12 The tendency to aggregate is prevented by the hybridization with inorganic materials. However, some setbacks of these rare-earth complexes, such as weaker luminescence intensity 12 and the greater tendency to aggregate, 6 limit development in their applications.…”

“…21,22 The oxides, graphene oxide sheets (GOSs), contain a large number of hydrophilic oxygen-containing functional groups such as carboxyl, epoxy, and hydroxyl, 13,14 which make it disperse in a variety of solvents. 4 GOSs can prevent the tendency to aggregate due to a large scale of independent and local p-conjugated regions formed by the defects and oxygen-containing groups on the surface. Herein, the combination of rare-earth organic complexes with GOSs can create inequable performances.…”

“…Rare-earth organic complexes with lengthy excitation wavelengths, 1 strong luminescence intensities, 2 long decay lifetimes, 3 and good thermal stability 4 always attract more attentions. The efficient methods to obtain materials with these excellent properties involve the selection of proper ligands 5 and the hybridization with inorganic materials. [6][7][8] Aromatic carboxylic acids, as important ligands, have wide applications in luminescence materials because of their strong coordination ability, good thermal stability, and multiconstruction.…”