Abstract
Two pyrazoline- and one pyrrolidine-bridged Ru(II)bipyridine-[60]fullerene dyads have been prepared and studied by ultrafast time-resolved spectroscopy. A silver-assisted synthesis route, in which Ag(I) removes the chlorides from the precursor complex Ru(bpy)2Cl2 facilitates successful coordination of the [60]fullerene-substituted third ligand. Upon light excitation of the ruthenium moiety, the emission was strongly quenched by the fullerene. The main quenching mechanism is an exceptionally fast direct energy transfer (kobs > 1 × 1012 s-1 in the pyrazoline-bridged dyads), resulting in population of the lowest excited triplet state of fullerene. No evidence for electron transfer was found, despite the extraordinarily short donor-acceptor distance that could kinetically favor that process. The observations have implications on the ongoing development of devices built from Ru-polypyridyl complexes and nanostructured carbon, such as C60 or nanotubes.
| Original language | English |
|---|---|
| Pages (from-to) | 7286-7294 |
| Number of pages | 9 |
| Journal | Inorganic Chemistry |
| Volume | 47 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - Aug 18 2008 |
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ASJC Scopus subject areas
- Inorganic Chemistry
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How close can you get? Studies of ultrafast light-induced processes in ruthenium-[60] fullerene dyads with short pyrazolino and pyrrolidine links. / Karlsson, Susanne; Modin, Judit; Becker, Hans Christian; Hammarström, Leif; Grennberg, Helena.
In: Inorganic Chemistry, Vol. 47, No. 16, 18.08.2008, p. 7286-7294.Research output: Contribution to journal › Article
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TY - JOUR
T1 - How close can you get? Studies of ultrafast light-induced processes in ruthenium-[60] fullerene dyads with short pyrazolino and pyrrolidine links
AU - Karlsson, Susanne
AU - Modin, Judit
AU - Becker, Hans Christian
AU - Hammarström, Leif
AU - Grennberg, Helena
PY - 2008/8/18
Y1 - 2008/8/18
N2 - Two pyrazoline- and one pyrrolidine-bridged Ru(II)bipyridine-[60]fullerene dyads have been prepared and studied by ultrafast time-resolved spectroscopy. A silver-assisted synthesis route, in which Ag(I) removes the chlorides from the precursor complex Ru(bpy)2Cl2 facilitates successful coordination of the [60]fullerene-substituted third ligand. Upon light excitation of the ruthenium moiety, the emission was strongly quenched by the fullerene. The main quenching mechanism is an exceptionally fast direct energy transfer (kobs > 1 × 1012 s-1 in the pyrazoline-bridged dyads), resulting in population of the lowest excited triplet state of fullerene. No evidence for electron transfer was found, despite the extraordinarily short donor-acceptor distance that could kinetically favor that process. The observations have implications on the ongoing development of devices built from Ru-polypyridyl complexes and nanostructured carbon, such as C60 or nanotubes.
AB - Two pyrazoline- and one pyrrolidine-bridged Ru(II)bipyridine-[60]fullerene dyads have been prepared and studied by ultrafast time-resolved spectroscopy. A silver-assisted synthesis route, in which Ag(I) removes the chlorides from the precursor complex Ru(bpy)2Cl2 facilitates successful coordination of the [60]fullerene-substituted third ligand. Upon light excitation of the ruthenium moiety, the emission was strongly quenched by the fullerene. The main quenching mechanism is an exceptionally fast direct energy transfer (kobs > 1 × 1012 s-1 in the pyrazoline-bridged dyads), resulting in population of the lowest excited triplet state of fullerene. No evidence for electron transfer was found, despite the extraordinarily short donor-acceptor distance that could kinetically favor that process. The observations have implications on the ongoing development of devices built from Ru-polypyridyl complexes and nanostructured carbon, such as C60 or nanotubes.
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U2 - 10.1021/ic800168d
DO - 10.1021/ic800168d
M3 - Article
VL - 47
SP - 7286
EP - 7294
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 16
ER -