Breu, Josef and Kratzer, Cornelius and Yersin, Hartmut (2000) Crystal engineering as a tool for directed radiationless energy transfer in layered {Lambda-[Ru(bpy)(3)]Delta-[Os(bpy)(3)]}(PF6)(4). JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 122 (11). pp. 2548-2555. ISSN 0002-7863
Full text not available from this repository. (Request a copy)Abstract
New types of crystal structures with new physical properties such as energy harvesting can be engineered by exploiting the potentiality of chiral recognition. In the proposed strategy one takes advantage of he possibility that in true racemates one enantiomeric component in the crystal packing may be replaced by a different molecule of the same chirality and similar shape. This opens the path to a number of new properties. In the present investigation, we demonstrate that a system can be engineered, in which homochiral Layers of Lambda-[Ru(bpy)(3)](2+) rigorously alternate with homochiral layers of Delta-[Os(bpy)(3)](2+). This arrangement is realized in {Lambda-[Ru(bpy)(3)]Delta-[Os(bpy)(3)]}(PF6)(4). Due to the deliberately introduced lower dimensionality, the new crystalline system exhibits fascinating properties, in particular with respect to an interplay of processes of interlayer and interlayer radiationless energy transfer. Interestingly, in this system it is possible to achieve a controlled accumulation of excitation energy on a single crystallographic Delta-[Os(bpy)(3)](2+) site. Moreover, the excitation energy is absorbed in a wide range from the UV to the red side of the visible by both Lambda-[Ru(bpy)(3)](2+) and Delta-[Os(bpy)(3)](2+) units, and one observes an intense red/infrared and highly resolved emission only of the low-energy Delta-[Os(bpy)(3)](2+) site, irrespective of the excitation wavelength used. The crystal structure of this newly engineered compound is determined for both the room-temperature phase (P32, a 10.7012(5) Angstrom, c 16.3490(10) Angstrom) as well as for the low-temperature phase (P3, a = 18.4189(10) Angstrom, c = 16.2309(9) Angstrom).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LOWEST EXCITED-STATES; COMPLEXES; <OS(BPY)3>2+; <RU(BPY)3>(PF6)2; RUTHENIUM(II); SPECTROSCOPY; EMISSION; SPECTRA; LIGAND; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry III - Physical Chemistry (Molecular Spectroscopy and Photochemistry) > Prof. Dr. Hartmut Yersin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 May 2022 09:16 |
| Last Modified: | 24 May 2022 09:16 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42733 |
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