A Facile Molecular Machine: Optically Triggered Counterion Migration by Charge Transfer of Linear Donor‐π‐Acceptor Phosphonium Fluorophores
作者:Andrey Belyaev、Yu‐Hsuan Cheng、Zong‐Ying Liu、Antti J. Karttunen、Pi‐Tai Chou、Igor O. Koshevoy
DOI:10.1002/anie.201906929
日期:2019.9.16
The D-π-A type phosphoniumsalts in which electron acceptor (A=-+ PR3 ) and donor (D=-NPh2 ) groups are linked by polarizable π-conjugated spacers show intense fluorescence that is classically ascribed to excited-state intramolecular charge transfer (ICT). Unexpectedly, salts with π=-(C6 H4 )n - and -(C10 H6 C6 H4 )- exhibit an unusual dual emission (F1 and F2 bands) in weakly polar or nonpolar solvents