Indium complex of 13,17-dibutyl-2,3,7,8,12,18-hexamethyl-5-azaporphyrin (Cl)InMAP was synthesized, and acid-base interactions of the meso-nitrogen atoms in (Cl)InMAP and its diaza analog (Cl)InDAP with acetic and trifluoroacetic acids were studied by 1H NMR and electronic spectroscopy. Depending on the medium, the complexes and proton-donor species HA give rise to acid solvates >N⋅⋅⋅(HA)n which are converted to final acid-base interaction products, H-complexes >N⋅⋅⋅H+⋅⋅⋅A−(HA)m or ionic associates >NH+⋅⋅⋅A−(HA)l , as the acidity of the medium rises. In acetic acid solution, the acid solvates derived from more basic (Cl)InMAP exist in equilibrium with the H-associates (pK a1 = 4.45±0.03). From (Cl)InDAP, the corresponding H-associates are formed only in the presence of H2SO4 (pK a1 = 2.10±0.03). In more polar media (solutions of trifluoroacetic acid in methylene chloride), ionic associates are formed, which involve one [(Cl)InMAP, pK 1 = 2.46±0.02] or two meso-nitrogen atoms [(Cl)InDAP, pK 1 = 2.11±0.03, pK 2 = 0.41±0.04).
                                    合成了 13,17-二丁基-2,3,7,8,12,18-六甲基-5-氮杂
卟啉的
铟络合物 (Cl)In
MAP,并通过 1H NMR 和电子能谱研究了 (Cl)In
MAP 及其重氮类似物 (Cl)InDAP 中的中氮原子与
乙酸和
三氟乙酸的酸碱相互作用。随着介质酸度的升高,络合物和质子供体物种 HA 会产生酸溶胶>N⋅⋅⋅(HA)n,并转化为最终的酸碱相互作用产物、H-络合物>N⋅⋅⋅H+⋅⋅⋅A-(HA)m 或离子络合物>NH+⋅⋅⋅A-(HA)l。在
醋酸溶液中,由碱性较强的(Cl)In
MAP 生成的酸溶质与 H-同系物(pK a1 = 4.45±0.03)处于平衡状态。(Cl)InDAP 只有在有 H2SO4 存在时才会形成相应的 H-同系物(pK a1 = 2.10±0.03)。在极性更强的介质(
三氟乙酸在
二氯甲烷中的溶液)中,会形成涉及一个[(Cl)In
MAP, pK 1 = 2.46±0.02] 或两个介氮原子[(Cl)InDAP, pK 1 = 2.11±0.03, pK 2 = 0.41±0.04]的离子联营体。