In:
Journal of Applied Physics, AIP Publishing, Vol. 80, No. 10 ( 1996-11-15), p. 5996-6001
Abstract:
The technique of hyper-Rayleigh scattering is used to determine and compare the first hyperpolarizabilities (β) of five structurally similar m-substituent phenyl-amine based chromophores using both internal and external standards. Contribution from the two photon absorption induced fluorescence to the observed signal is carefully removed. The chromophores with the m-substituted phenyl ring, that stabilizes the maximal charge-transfer state through resonance effect, are found to have larger static β values and redshifted electronic absorption peaks (λmax) compared with the para-nitroaniline (pNA) chromophore. The electron-withdrawing m-substituent of the chromophore is found to have the effect of reducing both the β and λmax values. Its effect on β is less pronounced when the π-electron reservoir is large. The enhancement of β value and the redshift λmax are observed to be consistent with the extent of the π electron delocalization.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
1996
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
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