𝔖 Bobbio Scriptorium
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Third-harmonic generation from all-trans β-carotene in liquid solution

✍ Scribed by J.B. van Beek; A.C. Albrecht

Book ID
103033220
Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
748 KB
Volume
187
Category
Article
ISSN
0009-2614

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✦ Synopsis

The third-order nonlinear susceptibility of all-trans p-carotene dissolved in benzene or carbon tetrachloride has been measured by third-harmonic generation at several incident laser wavelengths from I.030 to I.22 I pm. Its magnitude grows from I .8 X IO-' ' esu at I .030 pm to 3.8 x I 0-I ' esu at 1.22 I pn. Its phase is close to 180" and constant indicating the essential lack of one-, two-, and three-photon resonances in each of their corresponding spectral regions. The absence of any two-photon resonance in the 5 15-6 I I nm spectral region is particularly significant, for it is here where the photobiologically important 2 'A, electronic state of p-carotene is thought to be located.

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Selective resonant energy transfer from
Selective resonant energy transfer from all trans β-carotene to dimeric chlorophyll a in vitro
✍ N.E. Binnie; L.V. Haley; J.A. Koningstein 📂 Article 📅 1985 🏛 Elsevier Science 🌐 English ⚖ 379 KB

From analysis of the excitation spectrum of the 625 and \(688 \mathrm{~nm}\) Пuorescence of dimeric chlorophy Il 4 (Chl a) and the 668 \(\mathrm{nm}\) Пuorescence of the monomer in the presence or absence of all-trans \(\beta\)-carotene. It is concluded that resonant energy transfer occurs between \