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Synthesis, third-order nonlinear optical (NLO) properties of polystyrene containing 1,8-naphthalimide chromophores in the side chain
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Abstract
Two novel methacrylate monomers, (4-((methacryloyloxy)-hexyloxy)- benzylidene-hydrazine)-N-(4-alkyloxy)-benzene-1,8-naphthalimide (NAOPH) and (4-((methacryloyloxy)-hexyloxy)-3,5-dimethoxy-benzylidene-hydrazine)-N-(4-alkyloxy)- benzene-1,8-naphthalimide (NA3OPH) were synthesized. The polystyrenes containing 1,8-naphthalimide chromophores were prepared by copolymerization of styrene with NAOPH or NA3OPH. The obtained copolymers were characterized by GPC,
1
H-NMR and TLC. The third-order NLO properties of the monomers and copolymers were measured by Z-scan technique. Results show that both monomers and copolymers have reverse saturable absorption (RSA) and selfdefocusing effects. For monomers, NA3OPH has larger third-order NLO susceptibility χ
(3)
than NAOPH due to introduction of two more methoxy groups. For all copolymers, larger χ
(3)
is observed when content of 1,8-naphthalimide chromophores was higher.
Walter de Gruyter GmbH
Title: Synthesis, third-order nonlinear optical (NLO) properties of polystyrene containing 1,8-naphthalimide chromophores in the side chain
Description:
Abstract
Two novel methacrylate monomers, (4-((methacryloyloxy)-hexyloxy)- benzylidene-hydrazine)-N-(4-alkyloxy)-benzene-1,8-naphthalimide (NAOPH) and (4-((methacryloyloxy)-hexyloxy)-3,5-dimethoxy-benzylidene-hydrazine)-N-(4-alkyloxy)- benzene-1,8-naphthalimide (NA3OPH) were synthesized.
The polystyrenes containing 1,8-naphthalimide chromophores were prepared by copolymerization of styrene with NAOPH or NA3OPH.
The obtained copolymers were characterized by GPC,
1
H-NMR and TLC.
The third-order NLO properties of the monomers and copolymers were measured by Z-scan technique.
Results show that both monomers and copolymers have reverse saturable absorption (RSA) and selfdefocusing effects.
For monomers, NA3OPH has larger third-order NLO susceptibility χ
(3)
than NAOPH due to introduction of two more methoxy groups.
For all copolymers, larger χ
(3)
is observed when content of 1,8-naphthalimide chromophores was higher.
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