180903-84-8Relevant academic research and scientific papers
Chalcogens as electron donors for selected nonlinear optic phores
Blenkle, Martin,Boldt, Peter,Braeuchle, Christoph,Grahn, Walter,Ledoux, Isabelle,Nerenz, Heiko,Stadler, Stefan,Wichern, Juergen,Zyss, Joseph
, p. 1377 - 1384 (2007/10/03)
Three different heteroaromatic charge transfer chromophores, e.g. donor(D)-acceptor(A)-substituted thieno[3,2-b]thiophenes 3 and 4, D-substituted thieno[2,3-c]pyridinium salts 7 and 2-(2′-thienyl)pyridinium salts 10 have been prepared. Alkylchalcogenic ethers were used as D-groups. The molecular first hyperpolarizabilities β were determined by the EFISH method in the case of 3 and 4 and by the HRS method in the case of the ionic compounds 7 and 10. Substitution of the ether oxygen atom by sulfur increases markedly the β value which is not further increased by the higher chalcogens selenium and tellurium.
