Synthesis and characterization of new fluorescent two-photon absorption chromophores
Resource
Journal of Materials Chemistry 16: 850-857
Journal
Journal of Materials Chemistry
Journal Volume
16
Journal Issue
9
Pages
850-857
Date Issued
2006
Author(s)
Abstract
A series of dipolar and quadrupolar type two-photon absorption (TPA) compounds has been synthesized and TPA cross sections (σ) were measured by Tisapphire femtosecond laser excitation fluorescence (λ = 800 nm). Among them, the compound [2,5-bis-[5-(4-diphenylaminophenylethynyl)thiophen-2-yl]-[1, 3,4]oxadiazole], 12, has been structurally characterized by X-ray crystallography. The resulting data indicate that the structure of this compound possesses excellent coplanarity. The compounds have arylamines as the donor, and [1,3,4]oxadiazolyl, cyanovinyl or pyridazin-3,6-diyl moiety as the acceptor. Variation of arylamines and pendant alkyl groups was found to have a significant influence on σ values. By an appropriate combination of donor and acceptor, σ values of >103 GM (10-50 cm 4s photon·molecule-1) can be achieved. One quadrupolar molecule (13) possessing an arylamine donor and a pyridazine acceptor has both a high σ value (1442 GM) and σ/MW (1.97 GM/g). © The Royal Society of Chemistry 2006.
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journal article
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