180594-88-1Relevant articles and documents
Preparation of a novel cross-linked polymer for second-order nonlinear optics
Trolls?s, Mikael,Orrenius, Christian,Sahlén, Fredrik,Gedde, Ulf W.,Norin, Torbj?rn,Hult, Anders,Hermann, David,Rudquist, Per,Komitov, Lachezar,Lagerwall, Sven T.,Lindstr?m, Jan
, p. 8542 - 8548 (1996)
A novel cross-linked pyroelectric polymer with pronounced second-order nonlinear optical properties has been prepared. A multistep synthesis with several selective transformations including a kinetic resolution (transesterification) with the highly enantioselective Candida antarctica lipase B, yielded the monomer 4''-{(R)-(-)-2[(10-acryloyloxy)decyl]oxy}-3-nitrophenyl 4-{4'-[(11-acryloyloxy)undecyloxy]phenyl}benzoate A2c which displayed a ferroelectric chiral smectic C phase with large spontaneous polarization (175 nC/cm2). The monomer was poled and subsequently cross-linked by in-situ photopolymerization in the surface-stabilized ferroelectric liquid crystalline state. The cross-linked pyroelectric polymer exhibited an electro-optical coefficient (r22-r12) of 15-35 pm/V.