Publications by authors named "Galateia E Zervaki"
We report on the synthesis, characterization and photophysical properties of a donor-bridge-acceptor supramolecular hybrid system, consisting of a tetrapyridyl fullerene derivative (C60-tpyr) as electron acceptor, with the four pyridyl groups as part of oligophenyleneethynylene/phenylenevinylene bridges, and zinc porphyrin dimers (ZnP)2 as electron donor species. Based on the metal-to-ligand coordination between the zinc metal centers of (ZnP)2 and the four pyridyl entities of C60-tpyr, a strong binding constant (5 × 105 M-1) for the formation of C60-tpyr·[(ZnP)2]2 was evidenced. Insights into the electronic interactions between the photoactive (ZnP)2 units and C60-tpyr emanated from complementary physicochemical assays, which were further supported by theoretical calculations.
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- Two new types of porphyrin-porphyrin dyads were created, with one being symmetrical and the other unsymmetrical, using a method involving cyanuric chloride.
- The photophysical analysis revealed that both dyads have enhanced absorption characteristics, and their electrochemical properties suggest minimal interaction between the porphyrin units while being suitable for dye-sensitized solar cells (DSSCs).
- The 4-based DSSC achieved a higher power conversion efficiency (4.46%) compared to the 2-based DSSC (3.61%), attributed to better performance metrics like short-circuit current and open-circuit voltage, along with improved electron transport and longer electron lifetimes.