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A Pt-195 NMR study on zero-magnetic-field splitting and the phosphorescence properties in the excited triplet states of cyclometalated platinum(II) complexes
| Title: | A Pt-195 NMR study on zero-magnetic-field splitting and the phosphorescence properties in the excited triplet states of cyclometalated platinum(II) complexes |
| Authors: | Akagi, Soichiro Browse this author | | Fujii, Sho Browse this author →KAKEN DB | | Kitamura, Noboru Browse this author →KAKEN DB |
| Issue Date: | 21-May-2020 |
| Publisher: | Royal Society of Chemistry |
| Journal Title: | Dalton transactions |
| Volume: | 49 |
| Issue: | 19 |
| Start Page: | 6363 |
| End Page: | 6367 |
| Publisher DOI: | 10.1039/d0dt00532k |
| Abstract: | We report the factors governing zero-magnetic-field splitting (zfs) in the lowest-energy electronically excited triplet (T-1) states of cyclometalated platinum(II) complexes, whose zfs energies between the lowest- (phi(1)) and highest-energy spin-sublevels (phi(3)) in the T-1 states (Delta E-zfs) are already known: [Pt(bhq) (dpm)] (1Pt), [Pt(thpy)(acac)] (2Pt), [Pt(ppy)(acac)] (3Pt), cis-[Pt(thpy)(2) (4Pt), and cis-(Pt(ppy)(2)] ( 5Pt), where bhq, dpm, thpy, acac, and ppy are benzo[h]quinoline, dipivaloylmethane, 2-(2-thienyl)pyridine, acetylacetone, and 2-phenylpyridine, respectively. As one of the important findings, we show the relationship between the Delta E-zfs and Pt-195 NMR chemical shifts of the five Pt(II) complexes. The implications of the Delta E-zfs values on the emission properties of the Pt(II) complexes in acetonitrile at 293 K are also discussed. In particular, we demonstrate that the radiative rate constants of the Pt(II) complexes correlate with both Delta E-zfs and Pt-195 NMR chemical shifts. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/81429 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 藤井 翔
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