New chromophores containing sulfonamide, sulfonate, or sulfoximide groups for second harmonic generation

Abstract : The search for suitable NLO materials that are stable at elevated temperatures and that can be used for blue light generation requires that novel chromophores that can be incorporated into crosslinked polymers be developed. Several new tolane as well as stilbene chromophores with functionalized electron rich donor ends and electron-poor sulfonamide, sulfonate or sulfoximide ends have been prepared. These new chromophores have been evaluated for their transparency below 400 nm, and their molecular second-order hyperpolarizability has been measured by the EFISH method that provides mu Beta values. The results of these measurements indicate that several of these new chromophores are capable of meeting the requirements for frequency doubling of a diode laser operating at 820nm. The chemistry of these new NLO chromophores allows their easy functionalization for incorporation of independently polymerizable groups at the donor and the acceptor ends of the molecules.

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