Abstract
The synthesis, characterization, and photophysical and electrochemical properties of a novel tetrathiafulvalene (TTF)-annulated core-modified porphyrin (1) and its expanded rubyrin analogue (2) are described. The sulfur core modifications in 1 and 2 allow a feasible intramolecular charge transfer from the TTF fragments to the central conjugated core as inferred from comparative spectroscopic and electrochemical measurements. DFT calculations also support the intramolecular charge transfer nature of 1 and 2 upon excitation. Further the electronic perturbation of the TTF-annulated porphyrins was achieved by protonation, giving rise to a drastic change in the optical features with an extremely low energy band in the NIR region. The pronounced electron accepting ability of the macrocyclic core of the dicationic species (H212+ and H222+) resulted in the thermally excited electron transfer occurring at room temperature as elucidated by EPR spectroscopy. This journal is
| Original language | English |
|---|---|
| Pages (from-to) | 8699-8705 |
| Number of pages | 7 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 17 |
| Issue number | 14 |
| DOIs | |
| Publication status | Published - Apr 14 2015 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
Cite this
Intramolecular charge transfer character in tetrathiafulvalene-annulated porphyrinoids : effects of core modification and protonation. / Bolligarla, Ramababu; Ishida, Masatoshi; Shetti, Vijayendra S.; Yamasumi, Kazuhisa; Furuta, Hiroyuki; Lee, Chang Hee.
In: Physical Chemistry Chemical Physics, Vol. 17, No. 14, 14.04.2015, p. 8699-8705.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Intramolecular charge transfer character in tetrathiafulvalene-annulated porphyrinoids
T2 - effects of core modification and protonation
AU - Bolligarla, Ramababu
AU - Ishida, Masatoshi
AU - Shetti, Vijayendra S.
AU - Yamasumi, Kazuhisa
AU - Furuta, Hiroyuki
AU - Lee, Chang Hee
PY - 2015/4/14
Y1 - 2015/4/14
N2 - The synthesis, characterization, and photophysical and electrochemical properties of a novel tetrathiafulvalene (TTF)-annulated core-modified porphyrin (1) and its expanded rubyrin analogue (2) are described. The sulfur core modifications in 1 and 2 allow a feasible intramolecular charge transfer from the TTF fragments to the central conjugated core as inferred from comparative spectroscopic and electrochemical measurements. DFT calculations also support the intramolecular charge transfer nature of 1 and 2 upon excitation. Further the electronic perturbation of the TTF-annulated porphyrins was achieved by protonation, giving rise to a drastic change in the optical features with an extremely low energy band in the NIR region. The pronounced electron accepting ability of the macrocyclic core of the dicationic species (H212+ and H222+) resulted in the thermally excited electron transfer occurring at room temperature as elucidated by EPR spectroscopy. This journal is
AB - The synthesis, characterization, and photophysical and electrochemical properties of a novel tetrathiafulvalene (TTF)-annulated core-modified porphyrin (1) and its expanded rubyrin analogue (2) are described. The sulfur core modifications in 1 and 2 allow a feasible intramolecular charge transfer from the TTF fragments to the central conjugated core as inferred from comparative spectroscopic and electrochemical measurements. DFT calculations also support the intramolecular charge transfer nature of 1 and 2 upon excitation. Further the electronic perturbation of the TTF-annulated porphyrins was achieved by protonation, giving rise to a drastic change in the optical features with an extremely low energy band in the NIR region. The pronounced electron accepting ability of the macrocyclic core of the dicationic species (H212+ and H222+) resulted in the thermally excited electron transfer occurring at room temperature as elucidated by EPR spectroscopy. This journal is
UR - http://www.scopus.com/inward/record.url?scp=84983588296&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84983588296&partnerID=8YFLogxK
U2 - 10.1039/c4cp05385k
DO - 10.1039/c4cp05385k
M3 - Article
AN - SCOPUS:84983588296
VL - 17
SP - 8699
EP - 8705
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
SN - 1463-9076
IS - 14
ER -