We present femtosecond transient transmission measurements of thin films of the V^II/III-Cr^III Prussian blue analogue (V-Cr PBA) in the spectral range 330−675nm after exciting the ligand-to-metal charge-transfer transition (LMCT) at 400nm. A global analysis including three decay-times of τ₁=230fs, τ₂=1.38ps and τ₃>>2ns could satisfactory describe the data. We observed an excited state absorption (ESA) at 345nm, which was attributed to a charge-transfer transition from the ²E state on the Cr ions after fast intersystem crossing from the quartet manifold. An additional weak and short-lived ESA at 455nm was also observed and was tentatively attributed to the initially populated ⁴LMCT state.

中文翻译：

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V-Cr普鲁士蓝类似物的激发态吸收观察

我们在激发配体到金属的电荷转移跃迁（LMCT）之后，在330-675nm的光谱范围内呈现了V ^{II / III} -Cr ^III普鲁士蓝类似物（V-Cr PBA）薄膜的飞秒瞬态透射测量。400纳米 全局分析，包括τ三衰变次₁ = 230fs，τ ₂ = 1.38ps和τ _3个>> 2ns的可满意的描述数据。我们观察到在345nm处有一个激发态吸收（ESA），这归因于从四元组歧管快速跨系统跃迁后，Cr离子上的² E态发生了电荷转移跃迁。还观察到在455nm处有一个额外的弱且短暂的ESA，并暂时归因于最初居住的⁴ LMCT状态。