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Ballistic ΔS = 2 intersystem crossing in a cobalt cubane following ligand-field excitation probed by extreme ultraviolet spectroscopy
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2021-11-24 , DOI: 10.1039/d1cp04136c
Yusef Shari'ati 1 , Josh Vura-Weis 1
Affiliation  

Femtosecond M2,3-edge X-ray absorption near-edge structure (XANES) spectroscopy is used to probe the excited-state dynamics of the cobalt cubane [CoIII4O4](OAc)4(py)4 (OAc = acetate, py = pyridine), a model for water oxidation catalysts. After ligand-field excitation, intersystem crossing (ISC) to a metal-centered quintet occurs in 38 fs. 30% of the hot quintet undergoes ballistic back-ISC directly to the singlet ground state, with the remainder relaxing to a long-lived triplet.

中文翻译:

用极紫外光谱探测配体场激发后,钴立方烷中的弹道 ΔS = 2 系统间交叉

飞秒 M 2,3 - 边 X 射线吸收近边结构 (XANES) 光谱用于探测钴立方烷 [Co III 4 O 4 ](OAc) 4 (py) 4 (OAc =醋酸盐,py = 吡啶),水氧化催化剂的模型。在配体场激发后,在 38 fs 内发生系统间交叉 (ISC) 到以金属为中心的五重奏。30% 的热五重奏会直接经历弹道反 ISC 到单重态基态,其余的放松为长寿命的三重态。
更新日期:2021-11-30
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