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EPR and optical investigation of Mn~(2+) doped L-histidine-4-nitrophenolate 4-nitrophenol single crystal

机译:EPR和光学研究Mn〜(2+)掺杂L-组氨酸-4-硝基苯甲酸4-硝基苯酚单晶

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Single crystals of L-histidine-4-nitrophenolate 4-nitrophenol[LHFNP] complex doped with Mn~(2+) were grown by the slow evaporation method at room temperature. The EPR spectrum reveals the entry of one Mn~(2+) ion in the lattice. The angular variation plot was drawn between the angles and the magnetic field position. The spin Hamiltonian parameters were obtained by EPR-NMR program. The D and E values show the rhombic field around the ion and is an interstitial one. The g value obtained here suggests that the Mn~(2+) ion experiences a strong field and there is a transfer of electron from the metal ion to the ligand atom. The optical absorption study shows various bands and are assigned to the transition from the ground state ~6A_(1g)(S). The Racah and crystal field parameters have also been evaluated and fitted to the experimental values. The Racah parameter shows the covalent bonding between the metal ion to the ligand.
机译:通过缓慢的蒸发方法在室温下掺杂掺杂掺杂有Mn〜(2+)的L-组氨酸-4-硝基苯酚酸酯4-硝基苯酚[LHFNP]复合物的单晶。 EPR光谱显示在晶格中的一个Mn〜(2+)离子的入口。角度变形图在角度和磁场位置之间绘制。通过EPR-NMR程序获得Spin Hamiltonian参数。 D和E值显示了离子周围的菱形场,是间隙之一。这里获得的G值表明Mn〜(2+)离子经历了强大的场,并且存在从金属离子到配体原子的电子转移。光学吸收研究示出了各种带,并分配给从地态〜6a_(1g)的过渡。 RACAH和晶体场参数也得到了评估和适用于实验值。 Racah参数显示金属离子与配体之间的共价键合。

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