期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2020, 期 31, 页码 2983-2989出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202000440
关键词
Hexanuclear molybdenum cluster; Photoluminescence; Proton responsive cluster
资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government [26248022]
- Grants-in-Aid for Scientific Research [26248022] Funding Source: KAKEN
We designed and synthesized a new and novel octahedral hexamolybdenum(II) cluster bearing terminal pyridine-3-carboxylate (3L) or pyridine-4-carboxylate ligands (4L), [{Mo6Br8}(3L)(6)](2-)(3) or [{Mo6Br8}(4L)(6)](2-)(4), to demonstrate proton-switched emission behaviour of the cluster. X-ray crystal analysis of4demonstrated that the O-atom in the carboxylate group of4Lcoordinates to each Mo atom in the {Mo6Br8}(4+)-core, indicating that the N-atom of4Lin4is open for protonation. Reflecting such structural characteristics of the cluster, both3and4showed proton-switched emission behaviour owing to the changes in the electron-donating abilities of the relevant terminal ligands upon protonation to the pyridine N atoms: blue shifts of the emission spectra and increases in the emission lifetimes of the clusters.
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