4.2.2 Preparation of THB
(4-(2-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)vinyl)-1-(2-hydroxyethyl)
pyridin-1-ium bromide)
THB of AIE properity was produced by simple organic reactions. The
5-(4-(diphenylamino)phenyl)thiophene-2-carbaldehyde
was generated by Suzuki–Miyaura coupling reaction of
4-bromo-N,N-diphenylaniline with (5-formylthiophen-2-yl)boronic acid,
and then a condensation reaction with
1-(2-hydroxyethyl)-4-methylpyridin-1-ium bromide was underwent to give
THB with a total yield of 69%.