Contents General considerations .................................................................................................S2 Synthesis of emitters 1–4 .............................................................................................S3 Synthesis of emitter 2a....................................................................................... S3 Synthesis of emitter 3......................................................................................... S6 Synthesis of emitter 4a....................................................................................... S8 Synthesis of emitter 4b..................................................................................... S10 Luminescence spectra ................................................................................................S11 X-Ray Structure, crystal data and structure refinements for 2a.................................S20 X-Ray Structure, crystal data and structure refinements for 2b ................................S21 X-Ray Structure, crystal data and structure refinements for 3...................................S22 X-Ray Structure, crystal data and structure refinements for 4a.................................S23 X-Ray Structure, crystal data and structure refinements for 4b ................................S24 Quantum chemical calculations .................................................................................S25 CTI analysis for luminophores 15–17........................................................................S35 1H and 13C NMR data ................................................................................................S39