TY - JOUR
T1 - Femtosecond to Microsecond Dynamics of Soret-Band Excited Corroles
AU - Raavi, Sai Santosh Kumar
AU - Yin, Jun
AU - Grancini, Giulia
AU - Soci, Cesare
AU - Soma, Venugopal Rao
AU - Lanzani, Guglielmo
AU - Giribabu, Lingamallu
N1 - Funding Information:
R.S.S.K. thanks Dr. L. Luer, IMDEA-Madrid, for useful discussions. Authors thank Dr. A. Petrozza for extending the nanosecond-Flash Photolysis facility. Authors acknowledge J. Holt, D. Brida, and L. Luer for their contribution in software used for the data/kinetic modeling. R.S.S.K. thanks DST young scientist grant. S.V.R. thanks DRDO, India, for continued financial support. C.S. and G.L. would like to acknowledge the support of the Singapore Ministry of Education (MOE2013-T2-1-044). L.G. thanks to CSIR-XII FYP Intel Coat Project No. CSC-0114.
Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/12/31
Y1 - 2015/12/31
N2 - We present a comprehensive photophysical investigation on a series of three corroles (TTC, P-TTC, Ge-TTC dissolved in toluene), employing femtosecond and nanosecond transient absorption spectroscopy (TAS) measurements. Systematic analyses of the TAS data determined the rates and corresponding time constants of photophysical processes: internal conversion (τIC) in the 898-525 fs range, vibrational relaxation in the 7.44-13.6 ps range, intersystem crossing in the 033-1.09 ns range, and triplet lifetime (τtriplet) in the 0.8-3.5 μs range. The estimated triplet quantum yields (Φtriplet) were in the 0.42-0.61 range. Comparatively, GeTTC displayed faster τIC and higher Φtriplet. Additionally, the time-dependent density functional theory calculations were performed for the three molecules. The HOMO/LUMO energy levels and the oscillator strengths of various transitions were determined and presented.
AB - We present a comprehensive photophysical investigation on a series of three corroles (TTC, P-TTC, Ge-TTC dissolved in toluene), employing femtosecond and nanosecond transient absorption spectroscopy (TAS) measurements. Systematic analyses of the TAS data determined the rates and corresponding time constants of photophysical processes: internal conversion (τIC) in the 898-525 fs range, vibrational relaxation in the 7.44-13.6 ps range, intersystem crossing in the 033-1.09 ns range, and triplet lifetime (τtriplet) in the 0.8-3.5 μs range. The estimated triplet quantum yields (Φtriplet) were in the 0.42-0.61 range. Comparatively, GeTTC displayed faster τIC and higher Φtriplet. Additionally, the time-dependent density functional theory calculations were performed for the three molecules. The HOMO/LUMO energy levels and the oscillator strengths of various transitions were determined and presented.
UR - http://www.scopus.com/inward/record.url?scp=84953807418&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.5b08235
DO - 10.1021/acs.jpcc.5b08235
M3 - Journal article
AN - SCOPUS:84953807418
SN - 1932-7447
VL - 119
SP - 28691
EP - 28700
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 52
ER -