Energy transfer cooperation between ligands and Eu^III ions in molecular europium complexes for vapoluminescence sensing (reversible on/off emission switching) and hybrid white LED/plant-growth applications

Abstract

Two ancillary ligands were designed in the aspect of complete energy transfer to Eu(III) ion in the complex. Both the ligands were successfully synthesized and utilized for europium complexation (Eu(TTA)3-phen-fl-mCF3,...

Single component white-OLEDs derived from tris(β-diketonato) europium(iii) complexes bearing the large bite angle N^N 2-(4-thiazolyl)benzimidazole ligand

“…6 This allows efficient harvesting of the absorbed energy by the organic ligand(s) through the well-known antenna effect. 7 Besides, the intrinsic monochromatic red emission due to the electric-dipole (ED) 5 D 0 → 7 F 2 transition of Eu(III) 8 between 608 nm and 620 nm makes these complexes potential candidates as the red component 9 to fabricate tricolour RGB-based white organic light emitting diodes (white-OLEDs) given that the OEuCs exhibit efficient PL properties.…”

“…2 One of the promising classes of complexes for further development is the class of efficient organo-europium complexes (OEuCs) because of their exemplary photophysical properties leading to many fascinating applications such as sensors 3 and thermometers, 4 and in anti-counterfeiting applications. 5 To develop efficient OEuCs, the organic ligand(s) acting either as the primary antenna or as the ancillary ligands must have strong light absorption capabilities between 250 and 450 nm with a compatible triplet state ( 3 ππ*) leading to sufficiently separated 3 ππ* and Eu( iii ) emitting levels. 6 This allows efficient harvesting of the absorbed energy by the organic ligand(s) through the well-known antenna effect.…”

New isomeric ancillary ligands and their EuIII complexes: a single component white light emissive phosphor and their applications in red/white smart LEDs, electronic noses, and temperature sensing

“…The CRI is calculated to be more than that for previously reported Eu complexes (tri component hybrid white LED systems). 28 Herein, from the recently synthesized mCF 3 based Eu complexes, the dual (yellow and red) emission behavior was registered in solid and solution PL spectra, and it was found to be a reliable source to generate white light from a single molecule. The prerequisite requirement is the color balancing of three primary colors.…”

Thiabendazole: a new class of antenna core structure for multifunctional trivalent organo-europium (EuIII) complexes

“…This is a theoretical calculation carried out using the emission spectral data of the Eu(III) complexes, by the help of the equations given in the ESI. ‡ 22,[39][40][41] The J-O parameter is a straightforward constraint for analyzing the optical properties of the Eu(III) ions. 42 The detailed analyses of the J-O parameters and equations are described in the ESI ‡ (J-O section).…”