Synthesis, Optoelectronic and Photoluminescent Characterizations of Green Luminous Heteroleptic Ternary Terbium Complexes

• Published in: Journal of fluorescence Vol. 32; no. 3; pp. 1019 - 1029
• Main Authors: Dalal, Anuj, Nehra, Kapeesha, Hooda, Anjli, Singh, Sitender, Singh, Devender, Kumar, Sumit
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2022; Springer Nature B.V
• Subjects: Analytical Chemistry; Biochemistry; Biological and Medical Physics; Biomedical and Life Sciences; Biomedicine; Biophysics; Biotechnology; Chemical bonds; Coordination compounds; Diketones; Electrochemical analysis; Emission spectra; Gravimetric analysis; Ligands; Nitrogen; Optoelectronics; Original Article; Photoluminescence; Spectrum analysis; Terbium; Fluorescence; 2,2’-Bipyridine; Ternary terbium complexes; Tauc’s relation; Color purity
• ISSN: 1053-0509; 1573-4994; 1573-4994
• DOI: 10.1007/s10895-022-02920-7

This article presents four ternary terbium complexes based on fluorinated 2-thenoyltrifluoroacetone (TTFA) and N donor bidentate neutral ligands. The prepared complexes were examined by elemental study, electrochemical analysis, spectroscopically and thermo-gravimetrically. Spectral analysis shows the bonding of Tb 3+ ion with oxygen and nitrogen atom of diketone and neutral ligand respectively. Upon excitation in UV region, synthesized terbium complexes show luminescence in green region of electromagnetic spectrum. Photoluminescence emission spectra of complexes do not show any ligand based peak suggesting the effective transferal of energy from ligand to metal ion. Green emanation by terbium complexes is owing to intense peak ~547 nm ( 5 D 4  →  7 F 5 ). The outcome of emission data and CIE coordinates correlate with each other and affirms the utility of green luminous complexes as potential emissive material for optoelectronic gadgets applied in lighting system. Graphical abstract