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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Spectroscopic and Density Functional Theory Studies of 1,10-Phenanthroline, Its Radical Anion, and [Cu(Phen)(PPh_3)_2]~+
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Spectroscopic and Density Functional Theory Studies of 1,10-Phenanthroline, Its Radical Anion, and [Cu(Phen)(PPh_3)_2]~+

机译:1,10-菲咯啉,其自由基阴离子和[Cu(Phen)(PPh_3)_2]〜+的光谱和密度泛函理论研究

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摘要

The vibrational spectra (Raman and IR) of 1,10-phenanthroline (phen), its perdeuterated analogue (d_8-1,10-phenanthroline, d_8-phen), and the copper(I) complexes [Cu(phen)(PPh_3)_2]~+ and [Cu(d_8-phen)(PPh_3)_2]~+ have been measured. These spectra may be modeled using DFT calculations (B3LYP/6-31G(d)). The calculated structure compares favorably with crystallographic data. The time-resolved resonance Raman spectra of the copper(I) complexes were used to provide spectral signatures of phen~(· -) and d_8-phen~(· -). Geometries and vibrational spectra of the radical anions may be calculated in two ways: first as phen~(· -), which has been previously shown to be a 2B1 state. Calculations with B3LYP require the 6-311+G(d,p) basis set in order to predict this state correctly for the radical anion, rather than the close-lying ~2A_2 state, therefore giving a reasonable prediction of the geometry and spectra. Second, using [Cu(phen~(· -))(PH_3)_2] it is possible to model the radical anion at the B3LYP/6-31G(d) level because the metal center stabilizes the b_1 singly occupied ligand MO. The calculated spectra of [Cu(phen -)(PH_3)_2] and its perdeuterated analogue compare favorably with experimental data for the excited state of the complexes.
机译:1,10-菲咯啉(phen),其氘代类似物(d_8-1,10-菲咯啉,d_8-phen)和铜(I)络合物[Cu(phen)(PPh_3)的振动光谱(拉曼光谱和IR)已测量_2]〜+和[Cu(d_8-phen)(PPh_3)_2]〜+。可以使用DFT计算(B3LYP / 6-31G(d))对这些光谱进行建模。所计算的结构与晶体学数据相比具有优势。铜(I)配合物的时间分辨共振拉曼光谱用于提供phen〜(-)和d_8-phen〜(·-)的光谱特征。自由基阴离子的几何形状和振动光谱可以通过两种方法计算:第一种是phen〜(·-),以前已显示为2B1状态。使用B3LYP进行的计算需要使用6-311 + G(d,p)的基础集,以便正确预测自由基阴离子的状态,而不是接近的〜2A_2状态,因此可以合理预测几何形状和光谱。其次,使用[Cu(phen〜(·-))(PH_3)_2]可以在B3LYP / 6-31G(d)水平上模拟自由基阴离子,因为金属中心稳定了b_1单独占据的配体MO。所计算的[Cu(phen-)(PH_3)_2]及其全氘化类似物的光谱与配合物的激发态实验数据相比具有优势。

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