title: Crosslinkable nonlinear optical dendrimers synthesized by Diels-Alder reaction.
abstract: Crosslinkable NLO dendrimers based on azobenzene-type chromophores were synthesized by a Diels-Alder reaction. Their thermal and optical properties were investigated before and after poling at a high temperature. We found that the dendrimers retained good thermal stability up to 260 degrees C after curing at 130 degrees C for 10 min based on thermal analysis. Through in-situ poling and curing processes, the highest NLO activity of the dendrimers was d33 = 1.7 x 10(-6) esu at 1064 nm, which was determined by a Maker fringe experiment.
authors.affiliation: Department of Advanced Materials, Hannam University, Daejeon 305-811, Korea.
authors.forename: Su-Hwan
authors.initials: SH
authors.lastname: Bae
authors.forename: Hye-Min
authors.initials: HM
authors.lastname: Kim
authors.forename: Hae Sik
authors.initials: HS
authors.lastname: Min
authors.forename: Doseok
authors.initials: D
authors.lastname: Kim
authors.forename: Tae-Dong
authors.initials: TD
authors.lastname: Kim
mesh_terms: D003432:Cross-Linking Reagents / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D050091:Dendrimers / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D017711:Nonlinear Dynamics; D010316:Particle Size; D013499:Surface Properties
chemical_list: D003432:Cross-Linking Reagents; D050091:Dendrimers; D046911:Macromolecular Substances