Mechanofluorochromism of (D-π-)₂A-type azine-based fluorescent dyes.

ABSTRACT: Bathochromic or hypsochromic shift-type mechanofluorochromism (b-MFC or h-MFC) was found for (D-π-)₂A-type azine-based fluorescent dyes OUY-2, OUK-2, and OUJ-2 possessing intramolecular charge-transfer (ICT) characteristics from two (diphenylamino)carbazole-thiophene units as D (electron-donating group)-π (π-conjugated bridge) moieties to a pyridine, pyrazine, or triazine ring as A (electron-withdrawing group): grinding of the recrystallized dyes induced red or blue shifts of the fluorescent colors, that is, bathochromic or hypsochromic shifts of the fluorescence maximum wavelengths (λ^fl-solid _max). The degrees of MFC evaluated by the absolute value of differences (Δλ ^fl-solid _max) in λ^fl-solid _max before a

SUBMITTER: Takemura K 

PROVIDER: S-EPMC9089242 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature