Excited state interactions between the chiral Au 38 L 24 cluster and covalently attached porphyrin

Varnholt, Birte; Letrun, Romain; Bergkamp, Jesse J.; Fu, Yongchun; Yushchenko, Oleksandr; Decurtins, Silvio; Vauthey, Eric; Liu, Shi-Xia; Bürgi, Thomas (2015). Excited state interactions between the chiral Au 38 L 24 cluster and covalently attached porphyrin. Physical Chemistry Chemical Physics, 17(22), pp. 14788-14795. Royal Society of Chemistry 10.1039/C5CP01638J

[img] Text
c5cp01638j.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (2MB) | Request a copy

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 the functionalized cluster yielded enantiomeric pairs of clusters probably differing in the binding site of the porphyrin. As proven by circular dichroism, the chirality was maintained. Exciton coupling between the cluster and the chromophore is observed. Zinc can be incorporated into the porphyrin attached to the cluster, as evidenced by absorption and fluorescence spectroscopy, however, the reaction is slow. Quenching of the chromophore fluorescence is observed, which can be explained by energy transfer from the porphyrin to the cluster. Transient absorption spectra of Au38(2-phenylethanethiolate)24 and the functionalized cluster probe the bleach of the gold cluster due to ground state absorption and the characteristic excited state absorption signals. Zinc incorporation does not have a pronounced effect on the photophysical behaviour. Decay times are typical for the molecular behaviour of small monolayer protected gold clusters.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Decurtins, Silvio, Liu, Shi-Xia


500 Science > 540 Chemistry




Royal Society of Chemistry




Silvio Decurtins

Date Deposited:

11 Jun 2015 13:25

Last Modified:

05 Dec 2022 14:47

Publisher DOI:


PubMed ID:






Actions (login required)

Edit item Edit item
Provide Feedback