Rare-Earth Ions in Porous Matrices

Lezhnina, Marina M.; Kätker, Heike; Kynast, Ulrich

doi:10.1134/1.2014496

Cited by 5 publications

(1 citation statement)

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“…Such approach was extended to rare‐earth based molecules, with for instance lanthanide complexes that have been studied extensively over the past decades. The complexes were covalently bounded to the silica matrix or just diffused by physical encapsulation into the pores of zeolites, to obtain emissive hybrid materials. Indeed, these systems exhibit interesting improvement in terms of photo‐stability, chemical stability and thermo‐stability .…”

Section: Introductionmentioning

confidence: 99%

Selective Encapsulation and Enhancement of the Emission Properties of a Luminescent Cu(I) Complex in Mesoporous Silica

Donato

Atoini

Prasetyanto

et al. 2018

Helvetica Chimica Acta

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We describe a synthetic approach to prepare new luminescent silica‐based materials through the encapsulation of a neutral copper(I) complex inside the pores of mesoporous silica nanoparticles (MSN). The copper(I) complex is present, in the solid state, as two polymorphs, blue and yellow emissive, and in solution it shows a pale yellow color that is also mirrored by an emission in the yellow‐orange region of the electromagnetic spectrum. The X‐ray structures of single crystals have been obtained for both polymorphs. The complex encapsulation in MSN is achieved by its entrapment inside micelles followed by condensation of the silica source. Interestingly, the entrapment leads to the isolation of only one species. Indeed, the compound inside the MSN exhibits remarkable photophysical properties, showing an intense blue emission in solution and in the solid state. Powder X‐ray diffraction of the hybrid materials proves that the complex entrapped in MSN is indeed the blue polymorph. The confinement provides not only a method to isolate only one form of the complex, but also a certain rigidity, more stability of the system by protection of the complex from undesirable oxidation, leading to a highly emissive material possessing a photoluminescence quantum yield of 65%.

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Section: Introductionmentioning

confidence: 99%