A low-cost and efficient thio- and selenocyanation strategy for electron-rich arenes has been developed under constant-current electrolytic conditions in an undivided cell without the use of any catalyst or oxidant.
An internal electric field was used to promote the charge separation of conjugated microporous polymers (CMPs). Those with the largest dipole moment exhibited high efficiency in C-3 selenocyanation of indoles under visible-light and room temperature.