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Non-linear optical properties of hemicyanine monolayers and the protonation effect

✍ Scribed by G. Marowsky; L.F. Chi; D. Möbius; R. Steinhoff; Y.R. Shen; D. Dorsch; B. Rieger

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
444 KB
Volume
147
Category
Article
ISSN
0009-2614

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✦ Synopsis

Second-and third-harmonic generation have been observed from organized monolayers of the hemicyanine dye H3C-(C5N+Ha)-CH=CH-(CbHd)-N(C,aH3,)*.

A second-order polar&ability 8=2.5x IO-*'esu at 1.06 urn and 6.3~10~~' esu for resonant excitation at 0.9 15 pm was found. For molecules with the same chromophore, a stronger charge transfer leads to a larger 8. Protonation of the molecules, on the other hand, reduces the charge transfer and hence B.

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