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Synthesis, crystal structures, and solid state quadratic nonlinear optical properties of a series of stilbazolium cations combined with gold cyanide counter-ion

P. G. Lacroix, M. C. Munoz, A. B. Gaspar, J. A. Real, S. Bonhommeau, V. Rodriguez and K. Nakatani J. Mater. Chem., 2011, 21, 40, 15940

Références :

J. Mater. Chem., 2011, 21, 40, 15940

Auteur(s) : 

P. G. Lacroix, M. C. Munoz, A. B. Gaspar, J. A. Real, S. Bonhommeau, V. Rodriguez and K. Nakatani



Three salts built up from (E)-4′-(dimethylamino)-stilbazolium (DMAS)H+, (E)-4′-(diethylamino)-stilbazolium (DEAS)H+, (E)-4′-{2-(methoxymethyl) pyrrolidinyl}-stilbazolium (MPS)H+, and gold cyanide as a counter-ion, are reported. The crystal structures have been solved for (DEAS)H+ Au(CN)2− (Cc space group), and for (MPS)H+ Au(CN)2− (P1 space group). The semi-empirical (ZINDO) calculated static hyperpolarizability (β0) of (MPS)H+ is equal to 147 × 10−30 cm5 esu−1, in solid state, which is 25% higher than that of the cation of the well known (E)-4′-(dimethylamino)-methylstilbazolium tosylate (DAST). (MPS)H+ Au(CN)2− exhibits a unique crystal structure in which the cations are perfectly aligned. This combination of large hyperpolarizability and strict 1-dimensional character leads to a giant dzzz quadratic susceptibility (χ(2)) tensor component estimated between [similar]4500 pm V−1 ([similar]11 × 10−6 esu) and 12 400 pm V−1 ([similar]30 × 10−6 esu) at 1.064 μm, by a confocal μ-SHG technique. The use of such material in ultra-thin devices is critically evaluated.




Type :
Publication
Dates :
Paru le 9 septembre 2011
Informations complémentaires :
doi 10.1039/c1jm12105g

 

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