Functional lanthanide complexes with N,N′-bis(2-hydroxybenzyl)-N,N′-bis(pyridin-2-ylmethyl)ethylenediamine (H2bbpen) derivatives: Coordination chemistry, single-molecule magnetism and optical properties

Aggregation-Induced Emission via the Restriction of the Intramolecular Vibration Mechanism of Pinacol Lanthanide Complexes

“…The experimental results showed that PyraDy exhibited clear temperature-dependent in-phase (χ′) and out-of-phase (χ″) AC susceptibility signals under an external DC field of 800 Oe (Figure b). In the tunable frequency range of 10–1000 Hz, the in-phase and out-of-phase peaks of PyraDy gradually shifted toward the high-temperature region with increasing frequency, indicating that PyraDy is a field-induced single-molecule magnet (Figure c). , To further understand the relaxation process of PyraDy , Cole–Cole derived from the frequency-dependent AC magnetic susceptibility was plotted (Figure S16), and the Cole–Cole plot follows the single relaxation Debye model. In the high-temperature region, the relaxation time (τ) conforms to Arrhennius’s law (τ = τ 0 –1 exp­( U eff / k B T )), corresponding to the Orbach process.…”

U-type π-conjugated phosphorescent ligand sensitized lanthanide metal–organic frameworks for efficient white-light-emitting diodes

“…Because of their fascinating framework architectures, metal–organic frameworks (MOFs) have been developed quickly in research on gas storage/separation, optics, dye capture and catalysis over the last few decades. 9–18 These outstanding merits enable MOFs to be superior candidates for LED phosphors. 3 Among which, lanthanide metal–organic frameworks (Ln-MOFs) are recognized as special phosphors due to their special coordination structure and excellent optical properties generated by 4f electrons.…”

[α-AsW9O33]9− bridged hexagonal clusters of Ln(iii) showing field induced SMM behavior: experimental and theoretical insight

“…5 Polynuclear Ln-POMs are a subject of great interest due to their potential applications in luminescence and their significance in molecular magnetism, particularly in single-molecule magnets (SMMs). 3 Most lanthanide-based single-molecule magnets (SMMs) in the literature use organometallic or organic ligands, 6 and the non-rigid nature of most of these ligands reduces the chances of achieving the targeted symmetry. 7 However, SMMs designed using bulky polyoxometalates as cocoons for confining Ln ions offer different characteristics, including accessing nuclear-spin-free systems and minimizing quantum decoherence for unwanted relaxation and intermolecular magnetic interactions.…”