Synthesis, crystal structure and thermal decomposition mechanism of the complex [Sm(p-BrBA)3bipy·H2O]2·H2O

The effect of 4-halogenobenzoate ligands on luminescent and structural properties of lanthanide complexes: experimental and theoretical approaches

“…In all research results cited above, the syntheses of complexes, single crystal structures and different coordination modes are highlighted for complexes containing ligand derivatives of benzoic acid. [6][7][8][9][10][11] The presence of different halogens (F, Cl, Br or I) may change some physical chemistry properties of the lanthanides(III) complexes, such as (i) solubility in polar solvents due to the presence of the fluorine atom in the ligand structure; (ii) changes in the Eu-O covalence degree upon addition of the chlorine atom in the ligand structure, as reported by Malta and co-workers; 12 (iii) increase in the intersystem crossing (ISC) efficiency due to the presence of the iodine atom in the ligand structure as reported by Lower and El-Sayed; 13 (iv) the triplet level energy and (v) the energy of ligand to metal charge transfer states (LMCT) of europium(III) complexes.…”

Core–shell Ag@SiO2 nanoparticles of different silica shell thicknesses: Preparation and their effects on photoluminescence of lanthanide complexes

“…The absorption peak of 1,10-phenanthroline at 263 nm shifts to 264 nm in the complexes, which indicates that the lanthanide ions coordinate with 1,10-phenanthroline [34]. It can also be seen that the absorption peak of 2,2 0 -bipyridine at 287 nm shifts to 288 nm in the complexes, which indicates that 2,2 0 -bipyridine is involved in the coordination [35].…”

“…4 770 cm À1 . This shows that the lanthanide ions coordinate with 2,2'-bipyridine [35]. Moreover, the broad absorption bands around 3100-3500 cm À1 can be ascribed to the stretching vibration of water molecules in the lanthanide complexes.…”

Synthesis, crystal structure and thermochemical study on a novel ternary coordination compound [Bi(C7H5O3)3C12H8N2]

“…o-Hydroxybenzoic acid easily forms stable complexes with metal ions, whose complexes possess a higher biological activity and lower toxicity than itself. 1,10-Phenanthroline monohydrate has the properties of sterilization fluorescence and can also form stable complexes with lots of material, and now it has been widely used in the preparation of biological macromolecules probe, luminous material and antibacterial antitumor drugs [11]. Meanwhile, bismuth (III) is easily coordinated with oxygen and nitrogen atoms, forming various complexes [12,13].…”