Efficient modulation of photoluminescence by hydrogen bonding interactions between inorganic [MnBr4]2- anions and organic cations

The different hydrogen bond interactions in two organic-inorganic hybrid manganese halide compounds, namely [A](2)[MnBr4] (A = N-butyl-N-methylpyrrolidinium ([P14](+)) for (1) and N-butyl-N-methylpiperidinium ([PP14](+)) for (2)), lead to distinct photoluminescence quantum yields (81% for 1; 55% for 2). Further applications of luminescent 1 are also developed.