Electronic structure and photophysics of (C
C)tetra-p-tolylporphyrin2+†
Abstract
The electronic structure and photophysical properties of (CC)TTP2+ (TTP =
C unit in (C
C)TTP2+ causes a splitting of the degenerate LUMO and a large decrease in the HOMO–LUMO gap, while the 2+ charge and tolyl groups lead to additional charge-transfer-like transitions in the visible absorption spectrum. The small HOMO–LUMO gap and ruffled structure lead to a very short excited-state lifetime of 10 ± 0.3 ps.