Abstract
The reaction of β-diketophosphazene with the europium (III) salt synthesized the corresponding metal complex which was structured with (3-aminopropyl)triethoxysilane and treated with dibenzoylmethane for additional coordination of europium atoms. The polymer thus obtained exhibits luminescence with a maximum of 615 nm, which is characteristic of europium. The polymer is thermally stable up to 300 °C, the coating based on it has a contact angle of 101°, and the adhesive strength of the coating to non-finished glass (according to ISO 2409: 2013) is 1 point.
Highlights
Luminescent materials as well as lanthanide complexes have attracted much attention in recent decades due to their wide range of applications in photonics, namely, their use for obtaining tunable lasers, light-emitting diodes, optical amplifiers and luminescent probes for bioanalysis [1–8]
This excitation that known as the “antenna effect” is possessed by coordination ligands which can transfer energy from the ligand to the metal center resulting in luminescence of lanthanide ions [9]
Among them βdiketones are excellent chelating ligands used to sensitize the luminescence of the europium ion and have proven themselves well [10,21,22]
Summary
Luminescent materials as well as lanthanide complexes have attracted much attention in recent decades due to their wide range of applications in photonics, namely, their use for obtaining tunable lasers, light-emitting diodes, optical amplifiers and luminescent probes for bioanalysis [1–8]. The lanthanides show very low absorption coefficients, which requires the use of certain lanthanides for additional excitation of the metal center. This excitation that known as the “antenna effect” is possessed by coordination ligands which can transfer energy from the ligand to the metal center resulting in luminescence of lanthanide ions [9]. A large number of special ligands have been synthesized for sensitizing the luminescence of metals [10–17], in particular, europium [18–20]. As a result of this study, it was found that bis-β-diketones still have advantages for the construction of highly luminescent lanthanide complexes compared to mono-β-diketones [23,24]. Low molecular weight complexes have a number of disadvantages: they are not be able to form films, they sublime when heated, they are highly hygroscopic, hydrophilic or completely soluble in water, and their adhesion is not always satisfactory, limiting their areas of application
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