New insights into UV laser irradiation effect on luminescent behavior of vitrified films based on mesogenic lanthanide(III) β-diketonate complexes

Add time:08/18/2019    Source:sciencedirect.com

We revealed the effect of the prolonged UV laser irradiation on luminescent behavior of photonic materials based on mesogenic lanthanide(III) β-diketonate complexes by using a novel 3 μm vitrified film of an europium(III) β-diketonate complex. We used the Eu3+ ions to monitor the UV laser-induced photophysical processes in the film. Despite the fact that usually prolonged UV irradiation leads to irreversible photofragmentation of ligands, we had observed no photodecomposition of the complexes after the irradiation of the film with the 337 nm laser for 5 h. The spectroscopic study revealed (i) a 16.5-fold luminescence intensity decrease due to laser-induced changes in inner coordination spheres of the Eu3+ ions and (ii) the main channel of non-radiative energy losses from the Eu3+ ions through the multiphonon relaxation. These features open up new possibilities for designing advanced photonics materials with excellent photostability and luminescent properties controlled during operation.

We also recommend Trading Suppliers and Manufacturers of KOVAC'S COMPLEX (cas 15406-98-1). Pls Click Website Link as below: cas 15406-98-1 suppliers

Prev:Polymer paperOn volume-recovery theory: 2. Test on Kovacs's original δ vs t data
Next:Spectrophotometric properties of azo dye metal complex and its possible use as radiation dosimeter)