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• W3143602202 endingPage "2129" @default.
• W3143602202 startingPage "2129" @default.
• W3143602202 abstract "A family of four push–pull porphyrazines of A3B type, where each unit A contains two peripheral propyl chains and the unit B is endowed with a carboxylic acid, were prepared. The carboxylic acid was attached to the β-position of the pyrrolic unit, either directly (Pz 10), or through cyanovinyl (Pz 11) and phenyl (Pz 7) groups. The fourth Pz (14) consisted in a pyrazinoporphyrazine wherein the dinitrogenated heterocycle provided intrinsic donor–acceptor character to the macrocycle and contained a carboxyphenyl substituent. The direct attachment of the carboxylic acid functions and their linkers to the porphyrazine core produces stronger perturbation on the electronic properties of the macrocycle, with respect to their connection through fused benzene or pyrazine rings in TT112 and 14, respectively. The HOMO and LUMO energies of the Pzs, which were estimated with DFT calculations, show little variation within the series, except upon introduction of the cyanovinyl spacer, which produces a decrease in both frontier orbital energetic levels. This effective interaction of cyanovinyl substitution with the macrocycle is also evidenced in UV/Vis spectroscopy, where a large splitting of the Q-band indicates strong desymmetrization of the Pz. The performance of the four Pzs as photosensitizers in DSSCs were also investigated." @default.
• W3143602202 created "2021-04-13" @default.
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• W3143602202 date "2021-04-07" @default.
• W3143602202 modified "2023-10-09" @default.
• W3143602202 title "Tuning the Acceptor Unit of Push–Pull Porphyrazines for Dye-Sensitized Solar Cells" @default.
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• W3143602202 doi "https://doi.org/10.3390/molecules26082129" @default.
• W3143602202 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8068076" @default.
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• W3143602202 hasPublicationYear "2021" @default.
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