Abstract
The photoinduced electron transfer reaction in molecular assembly associated by intermolecular hydrogen bonding is very interesting in connection with not only the model of the electron transfer in biological systems like a photosynthetic reaction center, but also the fundamental aspect of effect of intermolecular hydrogen bonding on efficiency of electron transfer.Ureidopyrimidone(UPy) derivatives form dimers by quadruple hydrogen bonding with the high association constant in chloroform and toluene. Molecular assemblies constructed by hydrogen bonding have a potential use for the functional materials. We have synthesized UPy derivatives having a aromatic ring such as N,N-dimethylaniline and anthracene. In chloroform these compounds formed dimers by intermolecular hydrogen bonding and the hetero dimer consisted of N,N-dimethylaniline and anthracene exhibited excimer emission.The results studied by the fluorescence spectroscopy of these dimers will be reported. Furthermore, we will discuss the chain length dependence of the exciplex formation.
