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).
|Number of pages||8|
|Journal||Journal of Materials Chemistry|
|Publication status||Published - 2006|
ASJC Scopus subject areas
- Materials Chemistry
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CCDC 282997: Experimental Crystal Structure Determination
Huang, P. (Creator), Shen, J. (Creator), Pu, S. (Creator), Wen, Y. (Creator), Lin, J. T. (Creator), Chou, P. (Creator) & Yeh, M. P. (Creator), Unknown Publisher, 2006
DOI: 10.5517/cc9hgy5, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/cc9hgy5&sid=DataCite