Calculation of Energy Parameters for Interactions of Nd(III) and Pr(III) with DL-Serine by Using Their Absorption Spectr
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TRUCTURE OF MATTER AND QUANTUM CHEMISTRY
Calculation of Energy Parameters for Interactions of Nd(III) and Pr(III) with DL-Serine by Using Their Absorption Spectra As a Probe in the Presence and Absence of Zn(II) in Different Solvents Ramananda Singh Naorema, Dhritiman Borgohaina, and N. Mohondas Singha,* aDepartment
of Chemistry, Mizoram University (MZU), Aizawl, 796004 India * e-mail: [email protected]
Received February 25, 2020; revised March 28, 2020; accepted April 14, 2020
Abstract—In this study, the energy parameters such as Slater–Condon (FK) factor, Lande spin-orbit coupling constant (ξ4 f ), nephelauxetic ratio (β), bonding parameter (b1/2), and percent covalency (δ), have been evaluated involving the interaction between Nd(III) and Pr(III) with DL-serine by using their absorption spectra as a probe. The effect of Zn(II) was also investigated on their interaction in different solvents namely DMF, dioxane, methanol and acetonitrile. The variation in the values of these parameters were observed which revealed the formation of a bond between Nd(III) and DL-serine and also between Pr(III) and DL-serine. Further, oscillatory strength and Judd–Ofelt parameters were also calculated for every concern transitions. In both the interactions, it has been found that the solvent DMF promoted 4f–4f electric dipole intensity most out of the four different solvents. Keywords: 4f–4f transitions, nephelauxetic effect, absorption spectra, oscillatory strength, Judd–Ofelt parameter DOI: 10.1134/S0036024420130154
INTRODUCTION Lanthanides are well-known because of their various significances in the field of luminescence, photocatalysis, its metabolism in food chain etc. [1–3]. The unique features of lanthanides came from their f-electronic configurations and large size [4]. Research on lanthanides proved that they have various applications in industry, and agriculture, material sciences, medical diagnostics and treatment. Lanthanide nanotechnology is a fast growing technology which gives a significant impact on human health such as drug delivery and cancer diagnosis and therapy [6–9]. Lanthanide compounds have catalytic, magnetic and optical properties and they are responsible for sustained interest in lanthanide biochemistry [10–12]. Moreover, analysis the interaction between amino acid and lanthanide is significant in the field of biomedical in particular, under physiological conditions, e.g. the analysis of biological systems, artificial nucleases, the development of spectroscopic probes etc., so it is clear that information on the interaction of lanthanides with amino acids is critical to know how lanthanide ions may affect the biological systems and humans [13]. Thus, the coordination chemistry study is becoming necessary and significant.
In this study, the interaction between lanthanide and the amino acid is discussed and also the effect of Zn(II) was also investigated on their interactions. The energy interaction parameters involving the interactions of Nd(III) and Pr(III) with DL-serine are evaluated. MATERIALS
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