Linear polymers for nonlinear optics. I. Polyacrylates bearing aminonitro‐stilbene and ‐azobenzene dyes

Robello, Douglas R.

doi:10.1002/pola.1990.080280101

Cited by 125 publications

(63 citation statements)

References 14 publications

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“…THF is good solvent for MR2 units 29 and nonsolvent for MA units, 30 whereas aqueous NaOH is good one for MA 30 and nonsolvent for MR2. Figure 1 shows the results of M-37.…”

Section: Uv-vis Spectra Of Copolymer Solutionsmentioning

confidence: 99%

Preparation of nano‐ and microparticles through self‐assembly of azobenzene‐pendent ionomers

Mori

Yuyama

Narita

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:The particle formation of azobenzene-containing ionomers, through self-assembly, in aqueous media (THF/H 2 O solvent) was studied. The ionomers were synthesized by copolymerization between azobenzene-pendent methacrylate and methacrylic acid. It was revealed by UVvis spectra and light scattering measurements that the extent of H-aggregation of the azobenzene units first decreased, and then increased with increasing volume fraction of H 2 O of the solvent. The H 2 O fraction at which the extent of H-aggregation began to increase became lower, when the copolymers contained more azobenzene units. Colloidal particles were prepared by slow addition of various concentrations of aqueous NaOH to the copolymer THF solutions. The hydrodynamic diameters of the particles obtained by the procedures were several hundreds of nanometer. When the azobenzene unit content in the copolymer was smaller, the diameters of the particles became smaller. When the colloidal particles dispersions were cast on a carbon sheet and dried, the particles aggregated and formed larger spherical particles, with diameters of several micrometers. The size of the particles obtained by the drying process became smaller, when higher concentrations of aqueous NaOH solutions were used. Therefore, the particle sizes were controlled by the azobenzene units content in the copolymers and the concentration of aqueous NaOH solutions.

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“…THF is good solvent for MR2 units 29 and nonsolvent for MA units, 30 whereas aqueous NaOH is good one for MA 30 and nonsolvent for MR2. Figure 1 shows the results of M-37.…”

Section: Uv-vis Spectra Of Copolymer Solutionsmentioning

confidence: 99%

Preparation of nano‐ and microparticles through self‐assembly of azobenzene‐pendent ionomers

Mori

Yuyama

Narita

et al. 2006

J of Applied Polymer Sci

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“…4-(N-(2-Hydroxyethyl)-N-methylamino)-4-nitrostilbene was synthesized according to the published literature procedures. 18 All solvents were used after conventional purification methods. …”

Section: Methodsmentioning

confidence: 99%

Synthesis and properties of nonlinear optical side chain soluble polyimides for photonics applications

Lee

Han

et al. 1998

J. Polym. Sci. A Polym. Chem.

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“…36 The crude products were purified by recrystallization from ethanol and were then used to further reaction. Triethylamine (5.3 mL, 37.9 mmol) was added to a solution of 5-(4-phenylazo-phenoxy)-hexan-1-ol (7.5 g, 25.2 mmol) in dry THF (250 mL).…”

Section: Synthesis Of 2-bromo-2-methyl-propionic Acid 6-(4-phenylazo-mentioning

confidence: 99%

Synthesis and photoinduced surface‐relief grating of well‐defined azo‐containing polymethacrylates via atom transfer radical polymerization

Wang

Zhu

et al. 2007

J of Applied Polymer Sci

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A well-defined photoresponsive polymethacrylate containing azo chromophores, poly[6-(4-phenylazophenoxy)hexylmethacrylate] [Poly(PPHM)], was prepared with azo-based monofunctional and difunctional initiators via atom transfer radical polymerization in the presence of CuCl/1,1,4,7,10,10-hexamethyltriethylenetetramine. The polymerizations with first-order kinetics were well controlled with theoretical expected molecular weight and narrow molecular weight distributions in two initiation systems. The UV absorption intensities of the poly (PPHM)s increased with increasing molecular weight of the poly(PPHM)s in all cases. The 80-nm surface-relief gratings with 2.7% efficient diffraction formed on the poly (PPHM) film surface were obtained with a linearly polarized krypton laser with 10 min of irradiation at a recording beam intensity of 188 mW/cm 2 with a wavelength of 413.1 nm.

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Linear polymers for nonlinear optics. I. Polyacrylates bearing aminonitro‐stilbene and ‐azobenzene dyes

Cited by 125 publications

References 14 publications

Preparation of nano‐ and microparticles through self‐assembly of azobenzene‐pendent ionomers

Preparation of nano‐ and microparticles through self‐assembly of azobenzene‐pendent ionomers

Synthesis and properties of nonlinear optical side chain soluble polyimides for photonics applications

Synthesis and photoinduced surface‐relief grating of well‐defined azo‐containing polymethacrylates via atom transfer radical polymerization

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