A　thiophene　motif　has　been　integrated　into　mesoporous　carbon　nitride　(MCN)　to　improve　the　photoactivation　of　molecular　oxygen　towards　the　selective　oxidation　of　alcohols.　This　modification　also　extends　the　photoactive　part　of　the　spectrum　of　MCN　by　electronic　modification　of　the　conjugated　system.