A saddle-distorted and cationic Zn(II)-porphyrin complex was revealed to exhibit solvatochromism in organic solvents, depending on the donor numbers. The color change was derived from the alteration of the HOMO-LUMO gap caused by the distortion of the porphyrin mean plane due to solvent coordination.

中文翻译：

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鞍形扭曲阳离子 Zn(II)-卟啉配合物的溶剂化变色现象

研究表明，鞍形畸变的阳离子 Zn(II)-卟啉配合物在有机溶剂中表现出溶剂化显色现象，具体取决于供体数量。颜色的变化源自HOMO-LUMO间隙的改变，这是由于溶剂配位导致卟啉平均平面变形而引起的。