Synthesis of green emissive terbium(III) complexes for displays: Optical, electrochemical and photoluminescent analysis

Abstract

A series of heteroleptic terbium(III) complexes with fluorinated 2-thenoyltrifluoroacetone (TTFA) and other heteroaromatic units have been synthesized. The developed heteroleptic complexes were inspected via elemental study, cyclic voltammetry, thermal analysis and spectroscopic investigations. Optical band-gap data proposed the conducting property of prepared complexes. The photoluminescence emission profiles illustrated peaks based on terbium(III) cation (Tb 3+ ) positioned at $617, 586, 546 and 491 nm, imputed to 5 D 4 to 7 F J (J = 3,4,5,6) transitions separately. Most intense peak at 546 nm corresponding to 5 D 4 ! 7 F 5 transition is accountable for the green emissive character of developed complexes.The luminous character of complexes reveals the sensitization of Tb 3+ by ligands.Color parameters further corroborates the green emanation of Tb 3+ complexes. The photometric characteristics of complexes recommended their usages in designing display devices.

Formation of Complexes of f-Elements with Electron-Withdrawing N-Heterocyclic Diamides: Extraction and Solution Photophysics

“…The relatively low luminescence lifetime of the europium complex with the same ligand can be explained in a similar way. The results obtained for the para-position of the substituent in the ligand correlate with the data from [30]. Europium and terbium complexes with two other ligands have longer luminescence lifetimes.…”

Optical, electrochemical and photophysical analyses of heteroleptic luminescent Ln(iii) complexes for lighting applications

“…From (x, y), the other colorimetric parameters i.e., (u ′ , v ′ ) and color temperature (CT) were estimated through eqn ( 6) and ( 7). [66][67][68] (u ′ , v ′ ) with CT values are manifested in Fig. 11.…”

Photoluminescent Lanthanide(III) Coordination Polymers with Bis(1,2,4-Triazol-1-yl)Methane Linker

“…Luminescence due to 4f-transitions is of special interest since 4f-orbitals are shielded from 5s and 5p ones. As a result, the emission bands are quite sharp, while the luminescence is pure in color and individual for REE [4][5][6]; for example, it is red for the europium(III) [7,8] and green for the terbium(III) ion [9,10]. Samarium(III) and dysprosium(III) complexes receive much less attention since their luminescence intensity is usually low compared to europium(III) and terbium(III) complexes.…”