Solvation interactions and photostability of tetrakis(1-methylpyridyl)porphyrin derivatives

The Meta-Substituted Isomer of TMPyP Enables More Effective Photodynamic Bacterial Inactivation than Para-TMPyP In Vitro

“…Compared to the literature, the UV–VIS spectroscopic data of TMPyP are in good agreement [ 69 , 70 ]. However, the illumination-dependent decomposition occurred more rapidly in our measurements than reported previously.…”

“…With regard to our crystallographic analysis, one has to keep in mind that the choice of the reaction conditions significantly determines the degree of alkylation and therefore we chose DMF. The first report on the alkylation of variants of TPyP from 1982 [ 68 ] already made use of DMF as the reaction solvent as did a very recent report on the synthesis of meta -TMPyP and of para -TMPyP [ 69 ], while further synthetic conditions were unfortunately not given.…”

“…However, the illumination-dependent decomposition occurred more rapidly in our measurements than reported previously. In another study, much higher decay times for meta -TMPyP and para -TMPyP were estimated [ 69 ]. From our point of view, the higher stability in their measurements was due to irradiation at 365 nm for both meta -TMPyP and para -TMPyP , where both PSs possessed a dramatically lower extinction compared to 420 nm, as used in this study ( Figure 3 and Figure S5 ).…”

“…From our point of view, the higher stability in their measurements was due to irradiation at 365 nm for both meta -TMPyP and para -TMPyP , where both PSs possessed a dramatically lower extinction compared to 420 nm, as used in this study ( Figure 3 and Figure S5 ). Additionally, they used a lower light dose [ 69 ].…”

Carbon dots for photocatalytic H2 production in aqueous media with molecular Co catalysts

“…43 In addition the undetectable H 2 in the case of CatCo(II)3 is possibly once again due to the low stability of the porphyrin molecule under UV irradiation. 46 In order to understand better the high performance of Cat-Co(III)1 the DG (PS/Cat) were calculated for the three catalysts and the photosensitizer NCDot. The redox potentials of the reported compounds and the thermodynamic driving forces for the electron transfer process are listed in Table 2.…”