From weak to strong: axial noncovalent interactions of platinum(II) center with two nucleophilic iodines are very weak, anti-cooperative, and dispersive in nature in the ground electronic state. Depopulation of the anti-bonding σ*(I⋅⋅⋅Pt⋅⋅⋅I) orbital in the excited electronic state results in substantial strengthening of the interactions, which become partially covalent and cooperative.

中文翻译：

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铂 (II) 配合物中的非共价轴向 I⋅⋅⋅Pt⋅⋅⋅I 相互作用在激发态下增强

从弱到强：铂(II)中心与两个亲核碘的轴向非共价相互作用在基电子态下非常弱、反合作和色散。激发电子态下反键 σ*(I⋅⋅⋅Pt⋅⋅⋅I) 轨道的减少导致相互作用的显着增强，从而变得部分共价和合作。