Copper Fluoride Luminescence during UV Photofragmentation of Bis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionato)copper(II) in the Gas Phase
作者:David S. Talaga、Jeffrey I. Zink
DOI:10.1021/ic9515362
日期:1996.1.1
dimer luminescence is observed at the higher pressures, whereas at low pressures (total pressure no greater than the vapor pressure of the sample) exclusively CuF emission is observed. The a, A (omega = 0, 1, 2), B, and C excited states at 681.0, 567.6, and 505.1, and 491.7 nm are observed. The (3)Pi(0)(-) component of the A state is observed for the first time. The CuF luminescence obeys a quadratic power
双(1,1,1,5,5,5-六氟-2,4-戊二酮)铜(II),Cu(hfac)(2)的气相308和350-370 nm的光解产生CuF以及铜原子和二聚体。这些含金属的碎片,通过发光光谱法鉴定,在各种气相条件下进行了研究,范围从静态腔室中的1 bar到无碰撞分子束中的10(-4)mbar。在较高压力下观察到铜原子和二聚体发光,而在低压下(总压力不大于样品的蒸气压)仅观察到CuF发射。在681.0、567.6和505.1和491.7 nm处观察到a,A(ω= 0、1、2),B和C激发态。首次观察到A状态的(3)Pi(0)(-)分量。CuF发光遵循308 nm激发的二次幂定律。根据发射线的强度确定将多余的能量划分为碎片自由度。CuF片段的振动和旋转温度超过1700K。讨论了CuF形成的机理,与游离配体和其他挥发性铜络合物的比较以及对激光辅助化学气相沉积的影响。