“…Photoisomerization reactions and very weak fluorescence have been observed in polar solvent for N-heteroaromatic derivatives of t-APE, [22][23][24][25][26] probably due to the contribution of the ICT state, in contrast that no photoisomerization and relatively strong fluorescence was observed for t-APE itself. It is likely that other heteroaromatic derivatives such as thiophene increases the donor-acceptor ability to favor the formation of the excited ICT state and leads to influence fluorescence and photoisomerization characteristics.…”