Tuning emissive color of trivalent terbium ion through environmental factors: optoelectronic insights from theoretical, spectral and computational studies
Vandana Aggarwal, Devender Singh, Shri Bhagwan, Raman Kumar Saini, Komal Jakhar, Sumit Kumar, Prof Parvin Kumar, Jayant Sindhu
Abstract
) is dominant in Tb(iii)-based systems. The prepared complexes exhibit visible luminescence in both solid and solution media. Remarkably, the luminescence intensity of the mononuclear complex is significantly higher than that of its dinuclear counterpart, highlighting the impact of efficient energy transfer on emission intensity. The CIE color coordinates of these complexes in solution closely align with NTSC standard values. Additionally, modulation of emissive color is evident when the surrounding media (from solid to solution) and solvent nature are altered. Density Functional Theory (DFT) calculations were performed to elucidate the electronic density distribution in the synthesized complexes. Additionally, a comprehensive analysis, including IR, UV, NMR, thermogravimetry and cyclic voltammetry, was conducted, along with theoretical calculations using Judd-Ofelt analysis.