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Title: Triphenylcarbinol derivatives as molecules for 2nd-order nonlinear optics
Authors: Kelderman, E ×
Starmans, Waj
Vanduynhoven, Jpm
Verboom, W
Engbersen, Jfj
Reinhoudt, Dn
Derhaeg, L
Verbiest, Thierry
Clays, Koen
Persoons, Andre #
Issue Date: Jan-1994
Publisher: Amer chemical soc
Series Title: Chemistry of materials vol:6 issue:4 pages:412-417
Abstract: A series of novel tris D-pi-A substituted triphenylcarbinol derivatives have been synthesized and studied for their molecular second-order nonlinear optical properties by electric field induced second harmonic generation (EFISH) and hyper Rayleigh scattering (HRS). Compared to their phenyl analogs with only one D-pi-A system, the triphenylcarbinol derivatives 7 and 10-12 exhibit an increased hyperpolarizability ([beta] HRS) without the undesired red-shift of the charge-transfer band. The dipole moments and the hyperpolarizabilities are dependent on both the close proximity (3-4 angstrom) and the orientation of the three NLO-phore units. The nature of the acceptor substituent strongly influences the magnitude of the [beta]HRS values. The tris(nitrophenyl) derivative 7 exhibits a [beta]HRS value of 15 X 10(-31) esu, which is almost the same as that of its reference compound p-nitroanisole 13, whereas the tris(nitrostilbene) derivative 12 exhibits a [beta]HRs value of 338 x 10(-30) esu which is more than 3 times larger than that of its reference compound 4-methoxy-4'-nitrostilbene 16.
ISSN: 0897-4756
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Imaging and Photonics
× corresponding author
# (joint) last author

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