Trisubstituted porphyrin derivatives [(TriMPyP)M]${}^{3+}$(${\mathrm{\text{Cl}}}^{-}$)₃${\text{(where M = 2H, Zn}}^{\text{II}}$${\text{or Pd}}^{\text{II}})$ containing three $N$-methyl-4-pyridyl ($N$${\text{-MePy}}^{+})$ groups were synthesized and characterized electrochemically and spectroscopically in DMSO containing 0.1 M tetrabutylammonium salts. The effect of specific counter-anions, type of metal ion and number of meso-$N$${\text{-MePy}}^{+}$ groups on the redox behavior and spectroscopic properties of the neutral and reduced species are examined before and after controlled potential reduction in a thin-layer cell. Each tri-cationic derivative initially undergoes a global two-electron reduction to give a two-banded absorption spectrum with a broad near-IR band ranging from 750–807 nm depending on the type of metal ion. The position of the near-IR band for the doubly reduced porphyrin was also found to correlate with the number of meso-$N$${\text{-MePy}}^{+}$ groups on the macrocycle which varied from 1 to 4 while the first reduction potential remained essentially unchanged upon going from macrocycles with two to three to four meso-$N$${\text{-MePy}}^{+}$ groups.

三取代卟啉衍生物 [(TriMPyP)M]${}^{3+}$（${\mathrm{\text{氯}}}^{-}$) ₃${\text{（其中 M = 2H，Zn}}^{\text{二}}$${\text{或钯}}^{\text{二}}）$包含三个$氮$-甲基-4-吡啶基（$氮$${\text{-MePy}}^{+}）$在含有 0.1 M 四丁基铵盐的 DMSO 中合成并进行电化学和光谱表征。特定抗衡阴离子、金属离子类型和内消旋数量的影响$氮$${\text{-MePy}}^{+}$在薄层电池中受控电位还原之前和之后检查了中性和还原物质的氧化还原行为和光谱特性的研究组。每种三阳离子衍生物最初都会经历全局双电子还原，产生双带吸收光谱，其宽近红外波段范围为 750–807 nm，具体取决于金属离子的类型。还发现双还原卟啉的近红外带的位置与内消旋的数量相关。$氮$${\text{-MePy}}^{+}$大环上的基团从 1 变化到 4，而从具有 2 到 3 到 4 个内消旋的大环开始，第一还原电位基本保持不变-$氮$${\text{-MePy}}^{+}$组。