Title: Synthesis and Characterization of Pyrylogens Possessing Low Excitation Energies – Substituent Modification in Order to Improve Solar Energy Collection
Abstract:Abstract The synthesis and characterization of the first di‐β‐naphthyl‐substituted pyrylogens, N ‐methyl‐2,6‐di‐β‐naphthyl‐4,4′‐pyrylogen bis(tetrafluoroborate) and N ‐methyl‐2,6‐di‐β‐naphthyl‐4,2′‐py...Abstract The synthesis and characterization of the first di‐β‐naphthyl‐substituted pyrylogens, N ‐methyl‐2,6‐di‐β‐naphthyl‐4,4′‐pyrylogen bis(tetrafluoroborate) and N ‐methyl‐2,6‐di‐β‐naphthyl‐4,2′‐pyrylogen bis(tetrafluoroborate) are reported. The photophysical and electrochemical behaviors of these new pyrylogens are examined and compared to the previously reported diphenyl‐substituted analogs, N ‐methyl‐2,6‐diphenyl‐4,4′‐pyrylogen bis(tetrafluoroborate) and N ‐methyl‐2,6‐diphenyl‐4,2′‐pyrylogen bis(tetrafluoroborate) as well as to 2,4,6‐triphenylpyrylium tetrafluoroborate, the typical electron‐transfer photocatalyst. The newly synthesized pyrylogens exhibit substantially lower excitation energies. The results are supported by theoretical calculations using the B3LYP/6‐31G(d) and time‐dependent DFT (TD‐DFT) CAM‐B3LYP/6‐31G(d) computational models. In addition, insight into the reduction reactions of the new pyrylogens to their radical cation and neutral redox partners is also provided.Read More
Publication Year: 2012
Publication Date: 2012-07-13
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 7
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot