Benzo-2,1,3-thiadiazole-based, highly dichroic fluorescent dyes for fluorescent host?guest liquid crystal displaysElectronic supplementary information (ESI) available: general experimental details and synthesis methods for compounds 4, 6, 7, 8, 10, 11 and 12. See http://www.rsc.org/suppdata/jm/b4/b4