Hybrid lanthanide complexes based on a novel β-diketone functionalized polyhedral oligomeric silsesquioxane (POSS) and their nanocomposites with PMMA via in situ polymerization

Abstract

β-diketone-functionalized POSS dendrimer acted as a ligand to coordinate with lanthanide ions (Eu3+ and Tb3+) to form hybrid luminescent materials.

Silsesquioxane-based luminescent PMMA nanocomposites

“…41 These results means that microphase separation did not occur in these hybrid nanocomposites. 33 In addition, no maxima was observed in SAXS patterns (Fig. 7b)), which further suggested that hybrid complex was welldistributed in PMMA matrix and large-size aggregation did not occur, agreeing with the result of PXRD.…”

“…33 T mix -Map (0.14 g, 1 mmol) and Tb(NO 3 ) 3 ·6H 2 O (0.91 g, 2 mmol) were charged to a bottle with tetrahydrofuran (THF, 1.5 mL) with a magnetic stirrer and stirred overnight at room temperature. After removing the THF by vacuum, a pale yellow transparent oil compound was obtained (denoted as T mix -Tb).…”

Water‐Soluble Luminescent Hybrid Composites Consisting of Oligosilsesquioxanes and Lanthanide Complexes and their Sensing Ability for Cu2+

“…Very similar results were obtained when Tb 3+ replaced Eu 3+ in the hybrid composites (Figure b and Figure b). The improved stability of the hybrid composites can be ascribed to the rigid inorganic silica core, which provides high mechanical and physical stability . In addition, the 3D divergent configuration of Eu(dpa) 3 @POSS‐NH 2 can effectively ensure the uniform distribution of lanthanide in the hybrid composite, which prevents the self‐quenching of the lanthanide complex caused by aggregation phenomena at high concentrations …”

From Polymer to Monomer: Cleavage and Rearrangement of Si‐O‐Si Bonds after Oxidation Yielded an Ordered Cyclic Crystallized Structure

“…Thermogravimetric analysis (TGA) of P1 showed that the skeleton is thermally stable up to 330 °C (Figure S7). The weight loss step could be ascribed to the decomposition of the Si‐O‐Si bond, which shown less relation to the state of sulfur atom or the molecule weight 18. Therefore, the TGA curve of P1‐ox is similar to that of P1 , although the thermal degradation rate of the former obviously decreased after oxidation.…”