Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)3(CO2Et-dppz)]+ (R = py, 4-Me2N-py; CO2Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy

Marina K. Kuimova; Xue Zhong Sun; Pavel Matousek; David C. Grills; Anthony W. Parker; Michael Towrie; Michael W. George

doi:10.1039/b705002j

Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy

Marina K. Kuimova, Xue Zhong Sun, Pavel Matousek, David C. Grills, Anthony W. Parker, Michael Towrie, Michael W. George

Research output: Journal Publication › Article › peer-review

25 Citations (Scopus)

Abstract

The photophysics of fac-[Re(R)(CO)₃(CO₂Et-dppz)] ⁺ (R = py (1), 4-Me₂N-py (2); CO₂Et-dppz = dipyrido[3,2a:2′,3′c]phenazine-11-carboxylic ethyl ester) was studied with luminescence spectroscopy and time-resolved infrared (TRIR) spectroscopy in the metal carbonyl (2100-1800 cm^-1) and organic ester (1800-1600 cm^-1) regions. For 1, the picosecond TRIR spectra in the metal carbonyl region provided evidence for the formation of an intra-ligand IL (π-π*) excited state, which partially decays to an equilibrium with the metal-to-ligand charge transfer (MLCT) excited state. For 2 it is evident that both IL (π-π*) and MLCT excited states are formed within 2 ps of excitation. The magnitude of the ν(CO) shift in the metal carbonyl region following excitation allows the MLCT excited states to be described more precisely as a dπ(Re) → π*(phenazine) ³MLCT state for 1 and as a dπ(Re) → π*(phenanthroline) ³MLCT state for 2.

Original language	English
Pages (from-to)	1158-1163
Number of pages	6
Journal	Photochemical and Photobiological Sciences
Volume	6
Issue number	11
DOIs	https://doi.org/10.1039/b705002j
Publication status	Published - 2007
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry

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Kuimova, M. K., Sun, X. Z., Matousek, P., Grills, D. C., Parker, A. W., Towrie, M., & George, M. W. (2007). Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy. Photochemical and Photobiological Sciences, 6(11), 1158-1163. https://doi.org/10.1039/b705002j

Kuimova, Marina K. ; Sun, Xue Zhong ; Matousek, Pavel et al. / Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy. In: Photochemical and Photobiological Sciences. 2007 ; Vol. 6, No. 11. pp. 1158-1163.

@article{c55ebcb0728b4eb7b1a11d8f1b01dd9e,

title = "Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)3(CO2Et-dppz)]+ (R = py, 4-Me2N-py; CO2Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy",

abstract = "The photophysics of fac-[Re(R)(CO)3(CO2Et-dppz)] + (R = py (1), 4-Me2N-py (2); CO2Et-dppz = dipyrido[3,2a:2′,3′c]phenazine-11-carboxylic ethyl ester) was studied with luminescence spectroscopy and time-resolved infrared (TRIR) spectroscopy in the metal carbonyl (2100-1800 cm-1) and organic ester (1800-1600 cm-1) regions. For 1, the picosecond TRIR spectra in the metal carbonyl region provided evidence for the formation of an intra-ligand IL (π-π*) excited state, which partially decays to an equilibrium with the metal-to-ligand charge transfer (MLCT) excited state. For 2 it is evident that both IL (π-π*) and MLCT excited states are formed within 2 ps of excitation. The magnitude of the ν(CO) shift in the metal carbonyl region following excitation allows the MLCT excited states to be described more precisely as a dπ(Re) → π*(phenazine) 3MLCT state for 1 and as a dπ(Re) → π*(phenanthroline) 3MLCT state for 2.",

author = "Kuimova, {Marina K.} and Sun, {Xue Zhong} and Pavel Matousek and Grills, {David C.} and Parker, {Anthony W.} and Michael Towrie and George, {Michael W.}",

year = "2007",

doi = "10.1039/b705002j",

language = "English",

volume = "6",

pages = "1158--1163",

journal = "Photochemical and Photobiological Sciences",

issn = "1474-905X",

publisher = "Springer Nature",

number = "11",

}

Kuimova, MK, Sun, XZ, Matousek, P, Grills, DC, Parker, AW, Towrie, M & George, MW 2007, 'Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy', Photochemical and Photobiological Sciences, vol. 6, no. 11, pp. 1158-1163. https://doi.org/10.1039/b705002j

Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy. / Kuimova, Marina K.; Sun, Xue Zhong; Matousek, Pavel et al.
In: Photochemical and Photobiological Sciences, Vol. 6, No. 11, 2007, p. 1158-1163.

Research output: Journal Publication › Article › peer-review

TY - JOUR

T1 - Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)3(CO2Et-dppz)]+ (R = py, 4-Me2N-py; CO2Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy

AU - Kuimova, Marina K.

AU - Sun, Xue Zhong

AU - Matousek, Pavel

AU - Grills, David C.

AU - Parker, Anthony W.

AU - Towrie, Michael

AU - George, Michael W.

PY - 2007

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AB - The photophysics of fac-[Re(R)(CO)3(CO2Et-dppz)] + (R = py (1), 4-Me2N-py (2); CO2Et-dppz = dipyrido[3,2a:2′,3′c]phenazine-11-carboxylic ethyl ester) was studied with luminescence spectroscopy and time-resolved infrared (TRIR) spectroscopy in the metal carbonyl (2100-1800 cm-1) and organic ester (1800-1600 cm-1) regions. For 1, the picosecond TRIR spectra in the metal carbonyl region provided evidence for the formation of an intra-ligand IL (π-π*) excited state, which partially decays to an equilibrium with the metal-to-ligand charge transfer (MLCT) excited state. For 2 it is evident that both IL (π-π*) and MLCT excited states are formed within 2 ps of excitation. The magnitude of the ν(CO) shift in the metal carbonyl region following excitation allows the MLCT excited states to be described more precisely as a dπ(Re) → π*(phenazine) 3MLCT state for 1 and as a dπ(Re) → π*(phenanthroline) 3MLCT state for 2.

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U2 - 10.1039/b705002j

DO - 10.1039/b705002j

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Kuimova MK, Sun XZ, Matousek P, Grills DC, Parker AW, Towrie M et al. Probing intraligand and charge transfer excited states of fac-[Re(R)(CO)₃(CO₂Et-dppz)]⁺ (R = py, 4-Me₂N-py; CO₂Et-dppz = dipyrido[3,2a:2′,3′c] phenazine-11-carboxylic ethyl ester) using time-resolved infrared spectroscopy. Photochemical and Photobiological Sciences. 2007;6(11):1158-1163. doi: 10.1039/b705002j