Towards Covalent Photosensitizer-Polyoxometalate Dyads-Bipyridyl-Functionalized Polyoxometalates and Their Transition Metal Complexes
Abstract
:1. Introduction
2. Results and Discussion
2.1. Synthesis and Characterization of the Organo-Functionalized POMs
2.2. Synthesis and Characterization of the Photosensitizer-Polyoxometalate Dyads
2.3. Photophysical and Electrochemical Properties of the Dyads Based on the Wells–Dawson-Type POM
2.3.1. Electrochemical Properties
2.3.2. UV/vis Absorption and Emission Studies
2.4. Photophysical and Electrochemical Properties of the Dyads Based on the Anderson-Type POM
2.4.1. DFT Studies
2.4.2. Electrochemical Properties
2.4.3. UV/vis Absorption and Emission Properties
3. Materials and Methods
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample Availability: Samples of the compounds 1–11 are available from the authors. |
Compound | Rh-to-P Ratio 1 | Ir-to-P Ratio 1 | Rh-to-Mo Ratio 1 | Ir-to-Mo Ratio 1 |
---|---|---|---|---|
8 | 1:(2.3 ± 0.2) | – | – | – |
9 | – | 1:(2.1 ± 0.2) | – | – |
10 | – | – | 1:(2.9 ± 0.2) | – |
11 | – | – | – | 1:(3.1 + 0.2) |
Compound | Oxidation Potentials (V vs. Fc+/Fc) | Reduction Potentials (V vs. Fc+/Fc) |
---|---|---|
3 | – | −0.32, −0.62, −1.37, −1.83 2 |
8 | – | −1.35, −1.95, −2.68 2 |
9 | – | −1.23, −1.60, −1.91, −2.02, −2.81 2 |
5 | 0.24 3 | −1.34 3 |
6 | 0.39 3 | −1.28, −2.71 3 |
10 | 0.42 3 | −1.09, −1.94, −2.56, −2.88 3 |
11 | 0.86, 0.42 3 | −1.23, −1.85, −2.55, −2.91 3 |
Compound | Absorption (wavelength/nm) |
---|---|
[Rh(ppy)2(bpy)]+ | 258, 297, 3672 |
[Ir(ppy)2(bpy)]+ | 307, 341, 380, 4192 |
8 | 258, 303, 370 |
9 | 258, 310, 380 |
10 | 260, 302, 369 |
11 | 310, 338, 378, 417 |
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Winter, A.; Endres, P.; Schröter, E.; Jäger, M.; Görls, H.; Neumann, C.; Turchanin, A.; Schubert, U.S. Towards Covalent Photosensitizer-Polyoxometalate Dyads-Bipyridyl-Functionalized Polyoxometalates and Their Transition Metal Complexes. Molecules 2019, 24, 4446. https://doi.org/10.3390/molecules24244446
Winter A, Endres P, Schröter E, Jäger M, Görls H, Neumann C, Turchanin A, Schubert US. Towards Covalent Photosensitizer-Polyoxometalate Dyads-Bipyridyl-Functionalized Polyoxometalates and Their Transition Metal Complexes. Molecules. 2019; 24(24):4446. https://doi.org/10.3390/molecules24244446
Chicago/Turabian StyleWinter, Andreas, Patrick Endres, Erik Schröter, Michael Jäger, Helmar Görls, Christof Neumann, Andrey Turchanin, and Ulrich S. Schubert. 2019. "Towards Covalent Photosensitizer-Polyoxometalate Dyads-Bipyridyl-Functionalized Polyoxometalates and Their Transition Metal Complexes" Molecules 24, no. 24: 4446. https://doi.org/10.3390/molecules24244446