Solvatochromic or Vapochromic colors: Solvatochromic or vapochromic colors change color in response to polar changes within the local environment. This mechanism consequences from the stabilization of more polar of the ground or excited states of the chromophores. dyes whose dipole moment is considerably different among the ground state and the excited state change color relying on the polarity of their surroundings. A common structural feature of most Solvatochromic dyes is that they have "push−pull" structures, With a strong zwitterionic component for their electronic structure, for instance, a large conjugated π system with strong electron donor groups at one end and strong electron receptor groups at the other end. optimal solvatochromic colors have the largest changes in dipole moments and these variations in dipole moments are very large for these colors which The spectral changes can be so massive that dramatic color or fluorescence changes can be observed, depending on the polarity of the solvent wherein the dye is dissolved
Solvatochromic
or
Vapochromic
colors:
Solvatochromic
or
vapochromic
colors
change
color
in response to polar
changes
within the local environment. This mechanism
consequences from
the stabilization of more polar of the ground or excited states of the
chromophores
.
dyes
whose dipole moment is
considerably
different
among the ground state and the excited state
change
color
relying on the polarity of their surroundings. A common structural feature of most
Solvatochromic
dyes is that they have
"
push−pull
"
structures, With a strong
zwitterionic
component for their electronic structure,
for instance
, a large conjugated π system with strong electron donor groups at one
end
and strong electron receptor groups at the other
end
.
optimal
solvatochromic
colors have the largest
changes
in dipole moments and these variations in dipole moments are
very
large for these colors which The spectral
changes
can be
so
massive that dramatic
color
or fluorescence
changes
can
be observed
, depending on the polarity of the solvent wherein the dye is
dissolved