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New Ferrocenylpyridinium Salts with Bulk Second-Order Nonlinear Optical Properties

Plażuk D., Zakrzewski J., Nakatani K.

Polish Journal of Chemistry

2009

Vol. 83, nr 12

2105-2111

Protonation of (E)-1-ferrocenyl-2-(pyridin-4-yl)-ethylene with (+)-camphor-10-sulfonic and picric acid afforded salts displaying high second harmonic generation (SHG) efficiencies (70 and 10 × urea, respectively). Powder X-ray diffraction study confirmed crystallization of these salts in a noncentrosymmetric space group (P2). The electronic structure of the cationic part of the salts was studied by the DFT method.

A New Chiral 4-[(E)-2-Ferrocenylvinyl]-1-methylpyridinium Iodide Exhibiting Bulk Second-Order Nonlinear Optical Properties

Janowska I., Zakrzewski J., Palusiak M., Nakatani K.

Polish Journal of Chemistry

2007

Vol. 81, nr 5-6

1063-1070

Two new chiral 4-[(E)-2-ferrocenylvinyl]-1-methylpyridinium iodides, having in the 2-position of the ferrocenyl group (R)-1-N,N-dimethylaminoethyl and (S)-2-methoxymethylpyrrolidin- 1-yl substituents were synthesized. The latter compound showed weak second harmonic generation efficiency (0.5 x urea) at 1907 m. The molecular structure and crystal packing of this compound were determined by single-crystal X-ray diffraction and are discussed in relation to its nonlinear optical properties.