A series of urea complexes with rare-earth nitrates: Synthesis, structure and thermal decomposition

Achieving stable photoluminescence by double thiacalix[4]arene-capping: the lanthanide-oxo cluster core matters

“…Looking at the polynuclear core structure, we postulate that the large number of water molecules and hydroxyl bridges on the nonanuclear [Tb 9 (μ 5 -OH) 2 (μ 3 -O) 8 ] core may likely undergo dehydration under heating, which leads to the collapsing of the nonanuclear cluster structure in 4 . 63–65…”

“…Looking at the polynuclear core structure, we postulate that the large number of water molecules and hydroxyl bridges on the nonanuclear [Tb 9 (m 5 -OH) 2 (m 3 -O) 8 ] core may likely undergo dehydration under heating, which leads to the collapsing of the nonanuclear cluster structure in 4. [63][64][65] Because of the superior structural stability, we further characterize the luminescent stability of 2 under higher temperature and extended UV exposure. First, we conduct the solid-state temperature-dependent photoluminescence measurements from 25 to 275 C under 350 nm excitation on 2.…”