Department of Chemistry, Nagaland University, Lumami, Mokokchung 798 601, Nagaland, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Feb 15;103:160-6. doi: 10.1016/j.saa.2012.11.011. Epub 2012 Nov 16.
The interactions of Pr(III) with nucleosides and nucleotides have been studied in different organic solvents employing absorption difference and comparative absorption spectrophotometry. The magnitudes of the variations in both energy and intensity interaction parameters were used to explore the degree of outer and inner sphere co-ordination, incidence of covalency and the extent of metal 4f-orbital involvement in chemical bonding. Various electronic spectral parameters like Slater-Condon (F(k)), Racah (E(k)), Lande parameter (ξ(4f)), Nephelauxatic ratio (β), bonding (b(1/2)), percentage covalency (δ) and intensity parameters like oscillator strength (P) and Judd Ofelt electronic dipole intensity parameter (T(λ), λ=2,4,6) have been evaluated. The variation of these evaluated parameters were employed to interpret the nature of binding of Pr(III) with different ligands i.e. Adenosine/ATP in presence and absence of Ca(2+).
采用吸收差示和比较吸收分光光度法研究了钕（III）与核苷和核苷酸在不同有机溶剂中的相互作用。能量和强度相互作用参数的变化幅度用于探索外部和内部配合物的配位程度、共价键的发生程度以及金属 4f 轨道在化学键合中的参与程度。各种电子光谱参数，如 Slater-Condon（F(k)）、Racah（E(k)）、Lande 参数（ξ(4f)）、Nephelauxatic 比（β）、键合（b(1/2)）、共价键百分比（δ）和强度参数，如振子强度（P）和 Judd-Ofelt 电子偶极强度参数（T(λ)，λ=2、4、6），这些参数的变化用于解释 Pr(III)与不同配体（即腺苷/ATP 在存在和不存在 Ca(2+)的情况下）结合的性质。
