The photophysical properties of films of organic-inorganic lead halide perovskites under different ambient conditions are herein reported. We demonstrate that their luminescent properties are determined by the interplay between photoinduced activation and darkening processes, which strongly depend on the atmosphere surrounding the samples. We have isolated oxygen and moisture as the key element...

Efficient lanthanide (Ln) luminescent probes require good ligand-to-metal energy transfer and high aqueous stability. A family of ligands based on 2-hydroxyisophthalamide chelating units is reported. These form highly stable, eight-coordinate Ln complexes. Several of these (Ln = Sm, Eu, Tb, Dy) emit in the visible region with good ligand-to-lanthanide energy transfer. The absolute quantum yield...

We have studied the toxicity of luminescent silica nanoparticles to living cells from the whole cell level to the molecular level, such as the effects of the nanoparticles on DNA/protein damage, DNA repair activity, cell apoptosis, cell proliferation and death. Several biological approaches were employed to characterize the toxicity of the nanoparticles, including Vybrant apoptosis assay, MTT a...

A new host molecule, having two azacrown derivatives bridged by luminescent naphthalene diimide functionality, is found to form a [3]pseudorotaxane derivative with imidazolim ion-based guest molecules in non-polar solvents through hydrogen-bonded adduct formation. Depending upon the length of the covalent linker that links the imidazolium ion and the luminescent naphthalene fragment in the gues...

This paper describes how to calculate the power distribution emitted by luminescent particles which are mixed in the film of the waveguide, i.e., the percentage of the power transported by each guided mode, emitted to the cladding and the substrate. For our sample, they are ~20%, 25%, and 55% separately. Some calculated results have been proved: the powers of the TE and TM modes of the luminesc...

Luminescent radicals are gathering constant attention as a new class of luminescent material due to the ground and excited state doublet character. In their Research Article (e202302550), Ken Albrecht co-workers report carbazole dendronized tris(2,4,6-trichlorophenyl)-methyl (TTM) radical. Dendron modification increases photostability photoluminescence quantum yield up 63 % in cyclohexane. The ...

Luminescent radicals are gathering constant attention as a new class of luminescent materials due to the ground and excited state doublet character. In their Research Article (e202302550), Ken Albrecht co-workers report carbazole dendronized tris(2,4,6-trichlorophenyl)methyl (TTM) radical. Dendron modification increases photostability photoluminescence quantum yield up 63 % in cyclohexane. The ...

A luminescent two-dimensional (2D) coordination polymer is demonstrated to be a selective sensing material for the straightforward detection of nitrobenzene via a redox fluorescence quenching mechanism.

Facile conjugation of a luminescent cyclometalated Pt(II) complex with a DO3A-derived Gd(III) moiety yields a hybrid species with visible luminescence and enhanced relaxivity.

A novel ruthenium(II) complex with specific luminescent selectivity towards hybrid G-quadruplex DNA was developed that can easily be distinguished by the naked eye without further treatment.