Anchor-Functionalized Push-Pull-Substituted Bis(tridentate) Ruthenium(II) Polypyridine Chromophores: Photostability and Evaluation as Photosensitizers
- Authors
- Breivogel, Aaron; Wooh, Sanghyuk; Dietrich, Jan; Kim, Tea Yon; Kang, Yong Soo; Char, Kookheon; Heinze, Katja
- Issue Date
- Jun-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Ruthenium; Tridentate ligands; Sensitizers; Photochemistry; N ligands
- Citation
- EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, no.16, pp 2720 - 2734
- Pages
- 15
- Journal Title
- EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
- Number
- 16
- Start Page
- 2720
- End Page
- 2734
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/48864
- DOI
- 10.1002/ejic.201402091
- ISSN
- 1434-1948
1099-0682
- Abstract
- Stable push-pull substituted heteroleptic bis(tridentate) ruthenium(II) polypyridine complexes with COOH or 2,2-bipyridine anchor groups have been prepared and characterized by 1H, 13C and 15N NMR 1D and 2D spectroscopy, infrared spectroscopy, elemental analysis, high-resolution ESI mass spectrometry, electrochemistry, UV/Vis absorption spectroscopy, luminescence spectroscopy, and density functional calculations. The complexes feature a pronounced electronic directionality and high absorption wavelengths up to max = 544 nm extending to 720 nm as a result of favorable push-pull substitutions. A remarkable photostability in the presence of water and coordinating ions (I-) was discovered for the tridentate complexes when compared with the standard ruthenium sensitizer N719 and tris(bidentate) [Ru(bpy)3](PF6)2, which are highly photolabile under the same conditions (photodissociation/photosubstitution). The complexes were studied as photosensitizers in dye-sensitized solar cells. The incident photon-to-current conversion efficiency follows the absorption spectra into the NIR region. However, the high positive charge of the complexes (2+) favors the recombination of the injected electrons with I3- of the redox electrolyte, which is evidenced by high dark currents and short electron recombination lifetimes, leading to low cell performances compared with cells with the negatively charged N719 dye.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/48864)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.