2013
DOI: 10.1039/c3cc43833c
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Towards longer-lived metal-to-ligand charge transfer states of iron(ii) complexes: an N-heterocyclic carbene approach

Abstract: A 9 ps (3)MLCT lifetime was achieved by a Fe(II) complex based on C(NHC)^N(py)^C(NHC) pincer ligands. This is the longest known so far for any kind of complexes of this abundant metal, and increased by almost two orders of magnitude compared to the reference Fe(II) bis-terpyridine complex.

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Cited by 230 publications
(523 citation statements)
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“…The dynamics are dominated by two main processes. The first is an ultrafast ISC from 1 MLCT→ 3 MLCT, which has a time constant of ∼100 fs 24 in excellent agreement with previous experimental observations 11 . The rapid nature of this step is a result of the close energetic proximity of the 1 MLCT and 3 MLCT states, which promotes strong mixing and leads to efficient population transfer.…”
Section: Simulating the X-ray Spectrasupporting
confidence: 89%
See 3 more Smart Citations
“…The dynamics are dominated by two main processes. The first is an ultrafast ISC from 1 MLCT→ 3 MLCT, which has a time constant of ∼100 fs 24 in excellent agreement with previous experimental observations 11 . The rapid nature of this step is a result of the close energetic proximity of the 1 MLCT and 3 MLCT states, which promotes strong mixing and leads to efficient population transfer.…”
Section: Simulating the X-ray Spectrasupporting
confidence: 89%
“…As the dynamics progresses the spectrum begins to exhibit increasing characteristics of the 3 MC spectrum. There are also clear 300 fs oscillations in the transient signal, consistent with those observed in the transient absorption study 11,24 . As assigned above, this corresponds to the wavepacket motion along the ν 6 breathing mode 24 and consequently it is similar to the widely reported wavepacket dynamics of [Fe(bipy) 3 ] 2+ 9 .…”
Section: Femtosecond X-ray Spectroscopysupporting
confidence: 85%
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“…Recently, as shown by Wärnmark and coworkers, N-heterocyclic carbenes (NHC) have been proven to promote notable improvements of 3 MLCT lifetimes, thanks to strong σ-donating effects inducing the destabilization of MC states [25][26][27][28]. While no DSSCs have been built from the newly designed complexes, this work has fostered the revival of research towards the development of iron-based sensitizers for DSSCs, which has been almost asleep since the pioneering works by Ferrere using the Fe(dcbpy) 2 (CN) 2 dye [14].…”
Section: Introductionmentioning
confidence: 99%