Synthesis, Crystal Structure, Luminescence, and Nonlinear Optical Properties of 2-[(E)-[[4-[2-(4-Methoxyphenyl)ethynyl]phenyl] imino]methyl]-4- [(E)-phenyldiazenyl]phenol

2-((E)-((4-((4-methoxyphenyl)ethynyl)phenyl)imino)methyl-4-((E)phenyldiazenyl)phenol (1) have been synthesized and characterized. X-ray single crystal diffraction study of the compound 1 reveal a monoclinic structure. Room temperature luminescence is observed for 1 in CH2Cl2 solution due to π* → π transition. The SHG efficiency by Kurtz powder technique indicating the compound 1 displayed the second harmonic generation (SHG) property.

Eu luminescence from BaTiO3/SiO2 multilayer xerogel structures

Sol–gel technology was applied to fabricate Eu-doped BaTiO3/SiO2 multilayer structures by spinning on silicon and fused silica substrates. Eu photoluminescence (PL) was investigated depending on the annealing temperature of these structures. The samples demonstrate the room temperature luminescence corresponding to 5[Formula: see text]FJ ([Formula: see text], 2, 3, 4) transitions of trivalent europium with the most intensive band at 615 nm. For the structure on fused silica with Eu in the BaTiO3 cavity, increase of the annealing temperature from [Formula: see text]C to [Formula: see text]C results in modification of the luminescence indicatrix and lowering of the luminescence intensity in the direction along the surface normal. For BaTiO3/SiO2 multilayer structure generated on silicon, scanning electron microscopy (SEM) analyses reveal disordering after annealing at [Formula: see text]C. This heat treatment provides also an increase of the Eu luminescence intensity.

Triple responsive room temperature luminescence, photochromism and photomagnetism in a Dy(iii)-based linear chain complex

Triple responses of room temperature fluorescence, photochromism and photomagnetism tuned by photo/thermo-switched radicals were realized in a Dy(iii)-based metal–organic complex.

New germanate and mixed cobalt germanate salt inclusion materials: [(Rb6F)(Rb4F)][Ge14O32] and [(Rb6F)(Rb3.1Co0.9F0.96)][Co3.8Ge10.2O30F2]

Single crystal growth of new germanate salt inclusion materials. [(Rb6F)(Rb4F)][Ge14O32] exhibits room temperature luminescence and [(Rb6F)(Rb3.1Co0.9F0.96)][Co3.8Ge10.2O30F2] demonstrates Co/Ge mixing and an unanticipated Rb/Co inclusion.

Intramolecular electronic coupling for persistent room-temperature luminescence for smartphone based time-gated fingerprint detection

CzDPS emits persistent luminescence in both crystals and polymer matrixes, and can be used for time-gated luminescence imaging of fingerprints.