Time-resolved infrared spectrum of the MLCT excited state of W(CO) sub 5 (4-CNpyr) (4-CNpyr = 4-Cyanopyridine): Photophysics and photochemistry. [W(CO) sub 5 (4-cyanopyridine)]

Journal Article · Wed Sep 04 00:00:00 EDT 1991 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00018a029· OSTI ID:7273567

Glyn, P; Johnson, F P.A.; George, M W; Turner, J J ^[1]; Lees, A J ^[2]

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1. Univ. of Nottingham (United Kingdom)
2. State Univ. of New York, Binghamton (United States)

Fast time-resolved infrared spectroscopy is employed to probe the lower metal to 4-CNpyr charge-transfer (MLCT) excited state of W(CO){sub 5}(4-CNpyr)(4-CNpyr = 4-cyanopyridine). On visible irradiation, the CO stretching vibrations shift to higher frequency, confirming that in this excited state the metal center is oxidized. The excited state decays back to the ground state and, via the LF excited state, decomposes to W(CO){sub 5} and 4-CNpyr. The rate constants for these processes are equal (ca. 4 {times} 10{sup 6}s{sup {minus}1}), suggesting that there is a rapid equilibrium between the MLCT and LF states.

• OSTI ID: 7273567
• Journal Information: Inorganic Chemistry; (United States), Journal Name: Inorganic Chemistry; (United States) Vol. 30:18; ISSN 0020-1669; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400500* -- Photochemistry
ABSORPTION SPECTROSCOPY
CARBON MONOXIDE LASERS
CHARGE TRANSPORT
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
COMPLEXES
DECOMPOSITION
ENERGY LEVELS
EQUILIBRIUM
EXCITED STATES
GAS LASERS
GROUND STATES
INFRARED SPECTRA
KINETICS
LASERS
PHOTOCHEMISTRY
REACTION KINETICS
RESOLUTION
SPECTRA
SPECTROSCOPY
TIME RESOLUTION
TIMING PROPERTIES
TRANSITION ELEMENT COMPLEXES
TUNGSTEN COMPLEXES