S2 fluorescence from picene vapor

Solvent-dependent fluorescence behaviour of imide-fused [n]phenacenes (n = 3, 5, 7)

Imide-fused [n]phenacenes (nPDIs, n = 3, 5, 7) were systematically synthesised and their electronic features were investigated by electrochemical and electronic spectral measurements. nPDIs showed two reduction waves attributed to formation of radical ions and dianions. 3PDI produced blue fluorescence independent of solvent polarity. In contrast, 5PDI and 7PDI displayed marked positive solvatofluorochromism due to intramolecular charge transfer characters between the imide moieties and phenacene π cores in the excited state. The spectral features were analyzed by the Lippert-Mataga relationship and theoretical calculations.

Photochemical synthesis and photophysical properties of coumarins bearing extended polyaromatic rings studied by emission and transient absorption measurements

Coumarins having expanded π-electron systems were prepared via a photocondensation process and the photophysical features in solution were investigated based on emission and transient absorption measurements.

Systematic investigations on fused π-system compounds of seven benzene rings prepared by photocyclization of diphenanthrylethenes

Molecular and crystal structures of photoproducts (n@m and n@mPP) from diphenanthrylethenes (nEm) were studied to understand the photocyclization patterns, and the photophysical properties.

Photochemically-assisted synthesis and photophysical properties of difluoroboronated β-diketones with fused four-benzene-ring chromophores, chrysene and pyrene

We report synthesis and photophysical properties of difluoroboronated β-diketone complexes having chrysene and pyrene. Intense fluorescence is observable in solution and the solid state.

Photochemical synthesis and photophysical features of ethynylphenanthrenes studied by emission and transient absorption measurements

Phenanthrenes substituted with C–C triple bonds were photochemically prepared, and the photophysical features in solution were investigated based on emission and transient absorption measurements.