期刊
JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
卷 14, 期 3, 页码 319-329出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218863505002761
关键词
organic materials; two-photon absorption chromophores; conjugated systems; Heck coupling; molecular dimensionality; two-photon absorption cross-section
New organic donor-donor bis-stilbenyl conjugated chromophores arranged in increasing dimensionality (1D to 3D) have been synthesized in high yields by multiple Heck coupling. The central core is based on a biphenyl, triphenylenyl or spiro-bifluorenyl group when the donor part at each extremity is based on a 3,4,5-tridodecyloxyphenyl group that ensures a high solubility in organic solvents and favors the catalytic coupling reactions. Femtosecond two-photon absorption measurements in solution have evidenced improved two-photon absorption cross-sections (congruent to 10(-19) cm(4)/GW) that depend on the arrangement of the chromophores.
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