Zhang and co-workers ( J. Phys. Chem. Lett. 2020, 11, 1100−1105) have recently reported results of experiments involving irradiation of argon clusters doped with bromofluorene chromophores by nanosecond-long pulses of 532 nm laser light. Multiply charged ions of atomic argon (Arⁿ⁺, 1 ≤ n ≤ 7) and carbon (Cⁿ⁺, 1 ≤ n ≤ 4) are observed, which are sought to be rationalized using an evaporation model. The distinguishing facet of exploding clusters being progenitors of energetic ions and electrons constitutes the key driver for contemporary research in laser–cluster interactions; it is, therefore, important to point out inconsistencies that are intrinsic to the model of Zhang and co-workers. In light of similar reports already in the literature, we show that their model is of limited utility in describing the dynamics that govern how fast, multiply charged atomic ions result from laser irradiation of gas-phase clusters. We posit that it is plasma behavior that underpins cluster heating and cluster explosion dynamics.

中文翻译：

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纳秒级激光场电离氩团簇中带正电荷的氩离子的产生

张和同事（J.物理学。化学快报。 2020，11，1100年至1105年）最近报道的涉及氩气通过532nm的激光的纳秒长脉冲掺杂有溴芴生色团簇照射实验的结果。原子氩多电荷离子（AR ^{Ñ +}，1≤ Ñ ≤7）和碳（C ^{Ñ +}，1个≤ Ñ≤4）被观察到，希望使用蒸发模型使其合理化。爆炸性团簇的不同方面是高能离子和电子的祖先，是当代研究激光与团簇相互作用的主要动力。因此，重要的是指出张和同事的模型固有的矛盾。根据文献中已有的类似报道，我们表明，它们的模型在描述控制气相簇的激光辐照产生多倍带电原子离子的动力学方面的作用有限。我们假设是等离子体行为支撑了团簇加热和团簇爆炸动力学。