A new tetrakis β-diketone ligand for NIR emitting LnIII ions: luminescent doped PMMA films and flexible resins for advanced photonic applications

Abstract

A new antenna molecule containing four benzoyltrifluoroacetone (BTFA) moieties anchored to a single carbon atom and connected through four flexible methoxy groups, namely 1,1 0 -(4,4 0 -(2,2-bis((4-(4,4,4-trifluoro-3-oxobutanoyl)phenoxy)methyl) propane-1,3-diyl)bis(oxy)bis(4,1-phenylene))bis(4,4,4-

Synthesis, crystal structure and luminescent properties of a new samarium-fluorescein metal-organic framework

“…Even though water molecule acts as a luminescence quencher the quenching effect is overcome in the synthesized MOF [21]. The absence of electric dipolar transition in the dehydrated sample reveals that the local environment of the Sm 3þ ion is different in the as synthesized and dehydrated sample [22].…”

“…Also the quantum yield value is decreased to 5.99 ± 0.5% in the dehydrated sample. The low quantum yield value may be due to the absence of electric dipolar transition in the dehydrated sample [22].…”

Supramolecular Assembly of Molecular Rare-Earth–3,5-Dichlorobenzoic Acid–2,2′:6′,2″-Terpyridine Materials: Structural Systematics, Luminescence Properties, and Magnetic Behavior

“…The most intense of the three visible transitions for 6 is the hypersensitive 4 G 5/2 → 6 H 9/2 transition that, along with the 4 G 5/2 → 6 H 7/2 magnetic-dipole transition, is responsible for the red-orange color of Sm 3+ emission. 48 For 7, the spectrum is dominated by the hypersensitive 5 D 0 → 7 F 2 transition at ∼618 nm, which is responsible for the characteristic red luminescence of Eu 3+ materials. Additionally, the 5 D 0 → 7 F 2 transition is significantly more intense than the 5 D 0 → 7 F 1 magnetic-dipole transition, which coupled with the splitting observed in both of these transitions is consistent with crystallographic observations, which indicate that the Eu 3+ metal centers of 7 are in low-symmetry environments.…”

2D l‐Di‐toluoyl‐tartaric acid Lanthanide Coordination Polymers: Toward Single‐component White‐Light and NIR Luminescent Materials

“…On the basis of the large Stokes shift and the unique narrow band of lanthanide ions, [1] UV-visible and near-infrared (NIR) luminescence of lanthanide complexes have been studied extensively in terms of variouspotential applications in photochromism, [2] optoelectronic technology, [3] optical communication systems and opticala mplifiers, [4] [7] Nevertheless, lanthanide complexes have serious limitations in practical applications,s uch as poor mechanical property and physicochemicals tability. [8] Recently,w hite light-emitting materials of lanthanide coordination polymers (LnCPs) have attracted much attention due to their intrinsic stability,h igh photoluminescence efficiency,a nd long luminescence lifetime in lighting, backlights, [9] and full-color displays.…”