Fluorescent phenothiazine-triazine donor-acceptor conjugates by facile consecutive nucleophilic displacement – Color tuning by substitution and protochromicity

Multicomponent synthesis of chromophores – The one-pot approach to functional π-systems

“…The triazine building blocks have immense importance due to their extraordinary biological activities, especially in chemical medicine (Verma et al, 2020). Synthetically, after brominelithium exchange of the starting component 3-bromo-N-anisyl-phenothiazine with BuLi and introduction of the trichloro-1,3,5-triazine core by subsequent double nucleophilic substitution, the phenothiazine-triazine chromophores 105 can be obtained (Scheme 20B) (Kloeters et al, 2022).…”

“…The consecutive pseudo SCHEME 20 (A) Sequentially Pd-catalyzed arylation-amination consecutive three-component synthesis of 3,10-diaryl 10H-phenothiazines 104 (TRZ = 2,4diphenyl-1,3,5-triazine) (Mayer et al, 2020;Mayer and Müller, 2021). (B) One-pot sequence to synthesize disubstituted phenothiazine-triazine dyes 105 (Kloeters et al, 2022). (C) Pseudo five-component Sonogashira-Glaser cyclization synthesis of thienyl-bridged oligophenothiazines 106 (Urselmann et al, 2016).…”

Single molecule aggregation-induced dual and white-light emissive etherified aroyl-S,N-ketene acetalsviaone-pot synthesis

“…Many concepts have been applied like harvesting self-assembly processes, 5 a ,7 exciplex formation, 8 phosphorescent materials, 9 and environmental influences like solvent effects 10 or protonation. 11 But one of the most often used concepts for an efficient white light emission is the development of bi- or multichromophoric systems in which different emitter molecules are covalently linked but not conjugated. These materials can emit individually in the absence of energy transfer or as a consequence of a frustrated, i.e.…”