In this short review, we attempt to unfold various aspects of excited-state intramolecular
proton transfer (ESIPT) from the studies that are available up to date. Since Weller's …

Recently, Baird (anti) aromaticity has been referred to as a description of excited-state (anti)
aromaticity. With the term of Baird's rule, recent studies have intensively verified that the …

It is commonly accepted that a large π-conjugated system is necessary to realize low-energy
electronic transitions. Contrary to this prevailing notion, we present a new class of light …

Hydrogen bonding principles are at the core of supramolecular design. This overview
features a discussion relating molecular structure to hydrogen bond strengths, highlighting …

Gain of aromaticity or relief of antiaromaticity along a reaction path are important factors to
consider in mechanism studies. Analysis of such changes along potential energy surfaces …

Molecular emitters simultaneously generating light at different wavelengths have wide
applications. With a small molecule, however, it is challenging to realize two independent …

Conspectus Single-benzene fluorophores (SBFs) are small molecules that produce visible
light by using only one benzene ring as the sole aromatic core. This Account centers around …

The shape of the lowest singlet excited-state (S1) energy profile is of primary importance in
photochemistry and related materials science areas. Here we demonstrate a new approach …

Discovery of species with adaptive aromaticity (being aromatic in both the lowest singlet and
triplet states) is particularly challenging as cyclic species are generally aromatic either in the …

Excited-state aromaticity (ESA) and antiaromaticity (ESAA) are by now well-established
concepts for explaining photophysical properties and photochemical reactivities of cyclic …