Abstract
Four terbium(III) ternary complexes, namely [Tb(TFPB)3(topo)2] (N1), [Tb(TFPB)3(bipy)] (N2), [Tb(TFPB)3(phenan)] (N3) and [Tb(TFPB)3(neocup)] (N4), comprising 4,4,4-trifluoro-1-phenyl-1,3-butanedione (TFPB) and nitrogen and oxygen donors, have been successfully synthesized and subjected to detailed structural characterization. The analyses include elemental analysis, FTIR spectroscopy, thermogravimetric studies and 1H-NMR spectroscopy. IR studies presented vibrational peaks in 1470 to 1500 cm−1 region which are characteristic feature of the complexation of Ln(III) ion to 1,3-diketones. NMR analysis presented high dipolar paramagnetic shift from 114.7 to − 199.0 ppm due to TFPB and neutral ligand, respectively. Band gap values suggest the potential use of these complexes in semiconductor devices. The photoluminescent properties of these complexes have been examined in their solid states, revealing the impact of neutral ligands on the photoluminescent properties of Tb(III) ion. A thorough investigation into the energy transfer process is undertaken, establishing correlation between luminescence of the acceptor (terbium(III) ion) and the triplet state energy of the donor (ligands). Out of the set of complexes under examination, the luminescence intensity from complex N2 stands out as the most intense, followed by N4, N3 and N1. Additionally, the CIE color space coordinates for these complexes are precisely calculated and presented. Beyond their visible green emission, thermal patterns associated with these synthesized complexes have also been comprehensively explored.
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Vandana Aggarwal is thankful to UGC-New Delhi for providing JRF [221610012377].
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Vandana Aggarwal = Data curation, Writing - original draft; Devender Singh = Writing - review & editing and Supervision; Anjli Hooda = Project administration; Kapeesha Nehra = Formal analysis; Komal Jakhar = Visualization; Sumit Kumar = Investigation; Rajender Singh Malik = Resources and Validation; Parvin Kumar = Software.
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Aggarwal, V., Singh, D., Hooda, A. et al. Synthesis and photoluminescent analyses of ternary terbium(III) Tris-β-diketonate complexes: a systematic exploration. J Mater Sci: Mater Electron 35, 568 (2024). https://doi.org/10.1007/s10854-024-12314-z
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DOI: https://doi.org/10.1007/s10854-024-12314-z