作为用于光动力灭活(PDI)的单线态氧(1 O 2)敏化剂,烷基吡啶(Apy)键合的卟啉已受到相当多的关注。可以预期,Apy的引入会使卟啉具有水溶性,并增强了卟啉对DNA的亲和力。在这里,我们集中于Apy键合的P-卟啉,这些蛋白是通过Apy's的基团和接头修饰内消旋四苯基卟啉磷酸的轴向配体而制备的。将这些水溶性卟啉(1)用于在可见光照射下敏化大肠杆菌的灭活,因为只有很少的1 O 2敏化剂可以有效地灭活。低浓度的大肠杆菌。使用大肠杆菌的半衰期(每分钟T 1/2)和卟啉敏化剂的最低有效浓度([ P ])评估PDI活性。发现对大肠杆菌的PDI活性取决于Apy的烷基链长度。大肠杆菌的[ P ]值最优化为0.25μM的双[5-(3-乙基-1-吡啶基)-3-氧杂戊氧基]四苯基卟啉对二溴氯化磷(1b)。由于先前关于啤酒酵母的最佳[ P ]值的结果对于1b为50 nM ,因此发现[大肠杆菌的P ]值大于酿酒酵母。
作为用于光动力灭活(PDI)的单线态氧(1 O 2)敏化剂,烷基吡啶(Apy)键合的卟啉已受到相当多的关注。可以预期,Apy的引入会使卟啉具有水溶性,并增强了卟啉对DNA的亲和力。在这里,我们集中于Apy键合的P-卟啉,这些蛋白是通过Apy's的基团和接头修饰内消旋四苯基卟啉磷酸的轴向配体而制备的。将这些水溶性卟啉(1)用于在可见光照射下敏化大肠杆菌的灭活,因为只有很少的1 O 2敏化剂可以有效地灭活。低浓度的大肠杆菌。使用大肠杆菌的半衰期(每分钟T 1/2)和卟啉敏化剂的最低有效浓度([ P ])评估PDI活性。发现对大肠杆菌的PDI活性取决于Apy的烷基链长度。大肠杆菌的[ P ]值最优化为0.25μM的双[5-(3-乙基-1-吡啶基)-3-氧杂戊氧基]四苯基卟啉对二溴氯化磷(1b)。由于先前关于啤酒酵母的最佳[ P ]值的结果对于1b为50 nM ,因此发现[大肠杆菌的P ]值大于酿酒酵母。
Much attention has been paid to water-soluble porphyrins and metalloporphyrins as potential sensitizers for photodynamic therapy (PDT). Thus, water-soluble tricationic phosphorus porphyrin complexes were prepared via the introduction of an N-alkylpyridinio group on the axial ligands of phosphorus porphyrins. The resulting tricationic phosphorus porphyrins readily dissolve in aqueous solutions without the formation of aggregates, even at high concentration. Moreover, the affinity of the porphyrins to human serum albumin (HSA) is a key factor in their application to PDT since HSA plays an important role in the transport of drug molecules to a target cell. Interactions between the tricationic phosphorus porphyrins and HSA were examined on the basis of changes in the Soret bands of the absorption and fluorescence spectra of phosphorus porphyrin solutions in the presence of HSA and the fluorescence quenching of HSA by the tricationic phosphorus porphyrins. Tricationic phosphorus porphyrins with moderately long alkyl chains on the pyridinio group were strongly adsorbed on the HSA at a position near the tryptophan residue of HSA. This result suggests that tricationic phosphorus porphyrins containing alkyl groups are good candidates as PDT reagents because of their high water solubility and high affinity for HSA.
Tetracationic porphyrin dimers and heptacationic trimers were prepared by the connection of a bipyridyl linker with axial ligands of antimony(V) porphyrin and/or phosphorus(V) porphyrin complexes. The measurement of cyclic voltammetry and absorption spectra showed that the electrochemically reduced species was a long-lived species of antimony(IV) porphyrin chromophore.