Methyl pyropheophorbides prepared from naturally occurring chlorophyll-a were reacted with tin (II) dihalide in aerated solvents to give their tin (IV) complexes with two halides as the axial ligands. The tin (II)-insertion into the central position and the successive air-oxidation of tin (II) to tin (IV) proceeded cleanly for the 3-ethyl-, vinyl-, acetyl-, and formyl-chlorins. Their visible absorption and fluorescence emission maxima in dichloromethane were shifted to longer wavelengths in the order of F < Cl < Br as the axial ligand and CH₂CH₃ < CHCH₂ < COCH₃ < CHO as the 3-substituent. The heavy atom effect was observed for their fluorescence emission quantum yields and lifetimes, which were suppressed in the order of H₂ (free base) > SnF₂ > SnCl₂ > SnBr₂ at the central position.

由天然存在的叶绿素a制备的甲基焦脱镁叶绿酸与二卤化锡（II）在充气溶剂中反应，生成带有两个卤化物作为轴向配体的锡（IV）配合物。对于3-乙基-，乙烯基-，乙酰基和甲酰-二氢卟酚，可将锡（II）插入到中心位置，然后将锡（II）连续进行空气氧化为锡（IV）。它们在二氯甲烷中的可​​见光吸收和荧光发射最大值移至更长的波长，按轴向配体F <Cl <Br和CH ₂ CH ₃  <CH CH ₂  <COCH ₃的顺序进行。 <CHO为3取代基。观察到重原子效应的荧光发射量子产率和寿命，在中心位置按H ₂（游离碱）＞ SnF ₂  ＞ SnCl ₂  ＞ SnBr ₂的顺序被抑制。