Synthesis, structural, electrochemical, and photophysical properties of 4,2′‐thiopyrylogens – a novel class of sensitizers for photoinduced electron transfer reactions

The first three examples of the thioanalog of the 4,2′-pyrylogen ring system are reported. The influence of the sulfur atom on the structural, electrochemical, and photophysical behavior of this ring system is discussed. In addition, these 4,2′-thiopyrylogens are compared to their previously reported 4,4′-isomers and their 4,4′- and 4,2′-oxygen analogs. Copyright © 2010 John Wiley & Sons, Ltd.