Excited state interactions between the chiral Au38L24 cluster and covalently attached porphyrin
作者： Birte Varnholt , Romain Letrun , Jesse J. Bergkamp , Yongchun Fu , Oleksandr Yushchenko
DOI: 10.1039/C5CP01638J
关键词:
摘要: A protected S-acetylthio porphyrin was synthesized and attached to the Au38(2-phenylethanethiolate)24 cluster in a ligand exchange reaction. Chiral high performance liquid chromatography of functionalized yielded enantiomeric pairs clusters probably differing binding site porphyrin. As proven by circular dichroism, chirality maintained. Exciton coupling between chromophore is observed. Zinc can be incorporated into cluster, as evidenced absorption fluorescence spectroscopy, however, reaction slow. Quenching observed, which explained energy transfer from cluster. Transient spectra probe bleach gold due ground state characteristic excited signals. incorporation does not have pronounced effect on photophysical behaviour. Decay times are typical for molecular behaviour small monolayer clusters.
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