In photosynthesis, nature exploits the distinctive electronic properties of chromophores
arranged in supramolecular rings for efficient light harvesting. Among synthetic …

The photophysical behavior of natural and artificial cyclic supramolecular structures has
been intensively investigated in the past decade. Among the artificial structures, large fully π …

The design of molecular structures inspired by naturally occuring light harvesting systems
has been intensely pursued over the last couple of decades. Interesting new structures …

Femtosecond fluorescence anisotropy measurements for a variety of cyclic porphyrin arrays
such as ZnIIporphyrin m-trimer and hexamer are reported along with o-dimer and monomer …

The role of quantum coherence in photochemical functions of molecular systems such as
photosynthetic complexes is a broadly debated topic. Coexistence and intermixing of …

We present an account of the optical properties of the Frenkel excitons in self-assembled
porphyrin tubular aggregates that represent an analog to natural photosynthetic antennae …

Aromaticity can be a useful concept for predicting the behavior of excited states. Here we
show that π-conjugated porphyrin nanorings exhibit size-dependent excited-state global …

Because of their unique electronic properties, cyclic molecular structures ranging from
benzene to natural light-harvesting complexes have received much attention. Rigid π …

The photophysical properties of a series of ethynyl-bridged (porphinato) zinc (II) oligomers
have been investigated over the femtosecond and picosecond time scales using ultrafast …

We have investigated the influence of nuclear geometric relaxation on the extent of the
excited-state electronic delocalization in conjugated zinc porphyrin oligomers using ultrafast …