title: Dinitriles bearing AIE-active moieties: synthesis, E/Z isomerization, and fluorescence properties.
abstract: Dinitriles bearing aggregation-induced emission (AIE)-active moieties [tetraphenylethylene (TPE) or diphenylphenanthrene (DPP)] were prepared. Compounds 4 (TPE-linked) and 8 (DPP-linked) showed considerably redshifted emission resulting from their large Stokes shifts and also strong fluorescence in the aggregated and solid states. Pure E and Z stereoisomers of both dinitriles were easily separated, and their isomerization equilibria and fluorescence properties were investigated. In addition to their pronounced AIEE behavior, 4 and 8 also showed various reversible chromic responses to external stimuli, namely, solvato-, piezo-, vapo-, and thermochromism, which make them potential candidates for smart materials.
authors: Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578 (Japan).
authors: Thiago Teixeira
authors: TT
authors: Tasso
authors: Taniyuki
authors: T
authors: Furuyama
authors: Nagao
authors: N
authors: Kobayashi
mesh_terms: D018360:Crystallography, X-Ray; D005030:Ethylenes / Q000737:chemistry; D008968:Molecular Conformation; D009570:Nitriles / Q000138:chemical synthesis / Q000737:chemistry*; D012996:Solutions / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013237:Stereoisomerism
chemical_list: D005030:Ethylenes; D009570:Nitriles; D012996:Solutions
keywords: aggregation; cyanides; dyes/pigments; fluorescence; solvatochromism