TY - JOUR
T1 - Picosecond transient resonance Raman study on the excited-state conformational dynamics of a highly ruffled nickel porphyrin
AU - Jeong, Dae Hong
AU - Kim, Dongho
AU - Cho, Dae Won
AU - Jeoung, Sae Chae
PY - 2001
Y1 - 2001
N2 - Picosecond to nanosecond transient resonance Raman spectroscopy was applied to track down the excited-state conformational excursions of NiIIT(t-Bu)P [nickel(II) 5,10,15,20-tetra-tert-butylporphyrin] in various solvents with different dielectric properties. From the resonance Raman spectra of NiIIT(t-Bu)P obtained by picosecond pulse photoexcitation, the α4-type conformer was suggested to be dominant in the 1(d,d) excited state at the initial stage of deactivation processes (∼3 ps). However, only one conformer of αβαβ type was found to persist on the nanosecond time-scale. We also observed that the initial formation of the 1(d,d) excited state of NiIIT(t-Bu)P from the 1(π,π*) but the subsequent decay of the 1(d,d) to the ground state is strongly solvent dependent.
AB - Picosecond to nanosecond transient resonance Raman spectroscopy was applied to track down the excited-state conformational excursions of NiIIT(t-Bu)P [nickel(II) 5,10,15,20-tetra-tert-butylporphyrin] in various solvents with different dielectric properties. From the resonance Raman spectra of NiIIT(t-Bu)P obtained by picosecond pulse photoexcitation, the α4-type conformer was suggested to be dominant in the 1(d,d) excited state at the initial stage of deactivation processes (∼3 ps). However, only one conformer of αβαβ type was found to persist on the nanosecond time-scale. We also observed that the initial formation of the 1(d,d) excited state of NiIIT(t-Bu)P from the 1(π,π*) but the subsequent decay of the 1(d,d) to the ground state is strongly solvent dependent.
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U2 - 10.1002/jrs.713
DO - 10.1002/jrs.713
M3 - Article
AN - SCOPUS:0034897554
VL - 32
SP - 487
EP - 493
JO - Journal of Raman Spectroscopy
JF - Journal of Raman Spectroscopy
SN - 0377-0486
IS - 6-7
ER -