The electronic excited states of molecular aggregates and their photophysical signatures
have long fascinated spectroscopists and theoreticians alike since the advent of Frenkel …

Two-dimensionally extended, polycyclic heteroaromatic molecules (heterocyclic
nanographenes) are a highly versatile class of organic materials, applicable as functional …

The exciton band dispersion in π-stacks of conjugated organic chromophores is a critical
factor in determining the photophysical response and transport properties. In such stacks …

The spectroscopic differences between J and H-aggregates are traditionally attributed to the
spatial dependence of the Coulombic coupling, as originally proposed by Kasha. However …

Coupling among chromophores in molecular assemblies is responsible for phenomena
such as resonant energy transfer and intermolecular charge transfer. These processes are …

Absorption and photoluminescence properties of terrylene derivative 7, 8, 15, 16-
tetraazaterrylene (TAT) in its solution and crystal phases have revealed rather unusual …

The polarized absorption spectra of crystalline pentacene are obtained for excitation normal
to the ab herringbone plane by measuring transmitted light in ultrathin crystals. The spectral …

The energy landscape of a supramolecular material can include different molecular packing
configurations that differ in stability and function. We report here on a thermally driven …

A vibronic exciton model is introduced to describe the excited state band structure and
associated absorption spectra of low bandgap donor–acceptor conjugated polymers. The …

The relationship between symmetry-breaking charge separation (SB-CS) and null
aggregate (NA) formation in molecular dimer complexes is investigated theoretically, with …