Synthesis, self-assembly and photoinduced surface-relief gratings of a polyacrylate-based Azo polyelectrolyte

He, Yaning; Wang, Haopeng; Tuo, Xinlin; Deng, Wei; Wang, Xiaogong

doi:10.1016/j.optmat.2004.01.014

Cited by 19 publications

(6 citation statements)

References 24 publications

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“…These concern the -N=Nand -NO 2 groups that are "traps" for free radicals during polymerization [17]. So, azobenzenecontaining (co)polymers can be obtained by modifycation, in particular, with polyacryl chloride [18,19], poly(meth)acrylic acid [17,20], poly(2-(phenylethylamino)ethylacrylate) [21], poly(benzolisocyanate) [22], polyethyleneimine [23], epoxy polymers [24,25], as well as "living" (co)polymers containing, for example, blocks of poly(2-hydroxyethylmethacrylate) [13,26], isoprene [27,28], butadiene [29,30].…”

Section: Introductionmentioning

confidence: 99%

Polarization holography in azobenzene polymeric films prepared using the new chemical method

Давиденко¹,

Давиденко²,

Kravchenko³

et al. 2020

SPQEO

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The recording media for polarization holography based on azobenzene polymers are obtained by polymer-analogous transformations of polymethacrylic acid and its copolymers with alkyl methacrylates. Their informational properties were investigated when recording holograms of a plane wavefront. It has been found that the recording and relaxation times of holograms are approximately the same. They are defined mainly by the processes of trans-cis-isomerization of azobenzene groups without formation of surface relief of the polymeric film. The efficiency of the trans-cis-isomerization process decreases, if a heavy substituent is present in the azobenzene chromophore. These results are of practical interest in the choice of photosensitive materials for holographic recording media with optimal information characteristics.

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Section: Introductionmentioning

confidence: 99%

Polarization holography in azobenzene polymeric films prepared using the new chemical method

Давиденко¹,

Давиденко²,

Kravchenko³

et al. 2020

SPQEO

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“…Some systems have been developed including the photomechanical properties of molecules such as azo-benzenes. Due to the irradiation with light of a certain wavelength, the structure of the material is modified [7,8,9,10]. It has great advantages in vitro, but great limitations for in vivo application: it requires UV irradiation sources, which are harmful to the tissues and far from the so-called optical window of them.…”

Section: Introductionmentioning

confidence: 99%

Er-Doped Nanostructured BaTiO3 for NIR to Visible Upconversion

Meneses-Franco¹,

Campos‐Vallette

Vásquez

et al. 2018

Materials

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Photoluminescent mechanisms in erbium-doped barium titanate nanoparticle systems were studied. Er3+ ions were introduced into the BaTiO3 lattice by the sol-gel method. The resulting Er3+ concentration was between 0% and 5%, with Ba/Ti ratios of 1.008 and 0.993. The stoichiometry of Ba and Ti concentrations in the lattice influenced the doping mechanism and placement of erbium ions in the lattice structure. Our research shows the existence of a strong correlation between Ba/Ti ratios, erbium concentration, phase structure and doping site location on the upconversion photoluminescence mechanisms. Competing upconversion emissions 2H11/2/4S3/2→4I15/2 at 523 and 548 nm respectively and other photoluminescent mechanisms as 4I9/2→4I11/2 around 4000 nm (2500 cm−1) were studied using Raman and emission spectroscopy. The upconversion process is predominant over other photoluminescent decay when the material presents high distortion in the surrounding activator.

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“…Azobenzene-containing materials are photochromic and reversibly switch between two spectroscopically distinct forms by use of light. Thus azobenzene-based polymers are interesting due to their photoresponsive behavior which can be utilized in optical switches, optical data recording or optical information storage [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Self-Dyed Wholly Aromatic Polyamide-Hydrazides Covalently Bonded with Azo Groups in Their Main Chains: 1. Structure-Property Relationships

2012

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and increased with the para-phenylene units content. The polymers are partially soluble in DMAc, dimethyl formamide (DMF) and N-methyl-2-pyrrolidone (NMP). Their solubility increases with the introduction of meta-phenylene moieties into the polymer chains. The polymers exhibit a great affinity for water sorption. Their hydrophilicity increases as a function of the content of meta-phenylene rings incorporated into the polymer. Mechanical properties of the polymer films are improved markedly by substitution of para-phenylene units for meta-phenylene units. The completely para-oriented type polymer has the best thermal and thermo-oxidative stability relative to those of the other polymers.

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Synthesis, self-assembly and photoinduced surface-relief gratings of a polyacrylate-based Azo polyelectrolyte

Cited by 19 publications

References 24 publications

Polarization holography in azobenzene polymeric films prepared using the new chemical method

Polarization holography in azobenzene polymeric films prepared using the new chemical method

Er-Doped Nanostructured BaTiO3 for NIR to Visible Upconversion

Novel Self-Dyed Wholly Aromatic Polyamide-Hydrazides Covalently Bonded with Azo Groups in Their Main Chains: 1. Structure-Property Relationships

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