When the electrons of atoms or molecules absorb a quantum of
electromagnetic radiation there are transitions from one energy
state to another of higher energy. For this radiation absorption to
Fig. 1 Chemical structures of some linear carotenoids with different
chromophores
Table 1
Number of conjugated double bonds (c.d.b.) and absorption maxima (λ max )
in hexane of some carotenoids [5]
Carotenoid
c.d.b.
λ max (nm)
Phytoene
3
286
Phytofluene
5
348
ζ-Carotene
7
400
Neurosporene
9
440
Lycopene
11
471
Applications of Visible Spectroscopy and Color Measurements in the. . .
105
electromagnetic radiation there are transitions from one energy
state to another of higher energy. For this radiation absorption to
Fig. 1 Chemical structures of some linear carotenoids with different
chromophores
Table 1
Number of conjugated double bonds (c.d.b.) and absorption maxima (λ max )
in hexane of some carotenoids [5]
Carotenoid
c.d.b.
λ max (nm)
Phytoene
3
286
Phytofluene
5
348
ζ-Carotene
7
400
Neurosporene
9
440
Lycopene
11
471
Applications of Visible Spectroscopy and Color Measurements in the. . .
105