Modification of the optical properties of fluoropolymers by supercritical fluid impregnation with europium β-diketonates

Gerasimova, V. I.; Zavorotny, Yu. S.; Рыбалтовский, А. О.; Antoshkov, A. A.; Соколов, В. И.; Troitskaya, E. V.; Баграташвили, В. Н.

doi:10.1134/s1990793110070158

Cited by 6 publications

(4 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For a better understanding of the UV absorption bands, the UV-Vis (210-800 nm) absorption spectra were also recorded in 10 -5 M methanol diluted solutions (see the inset in Figure 9), allowing a more resolved spectra of the ligands absorption. The maxima in this case are at around 285 nm and thus can be assigned to the π→π* intra-ligand transition in the fod moiety [34][35][36]. Consequently, the main peak observed in the solid powder measurements at about 270 nm can be tentatively assigned to electronic intraligand transitions in the fod moiety, while the other components would be due to π→π* transitions in the diimide molecules, in agreement with Gerasimova et al [37].…”

Section: Absorption Spectrasupporting

confidence: 82%

Highly fluorinated erbium(III) complexes for emission in the C-band

Martín-Ramos

Silva

Lahoz

et al. 2014

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

Two highly fluorinated Er 3+ complexes with three 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5octanedionate (fod) groups and either bipyridine (bipy) or bathophenantholine (bath) as the ancillary ligand emitting at the C-band (third communication window for fiber transmission) are presented. These complexes are the result of a design process aimed at decreasing the vibrational quenching from high frequency oscillators. The structure of [Er(fod) 3 (bipy)] has been elucidated by single-crystal X-ray diffraction, while Sparkle/PM6 and Sparkle/PM7 semi-empirical calculations have been used to model the ground state geometry for [Er(fod) 3 (bath)]. Photoluminescence studies confirm sensitization of the Er 3+ ions by antenna effect, leading to NIR emission at 1.53 µm. This energy transfer proves to be more efficient for [Er(fod) 3 (bath)] as a result of the bulkier and more rigid structure of bath diimide. The good thermal stability of the materials up to over 200 ºC allows envisaging their use in erbium-doped waveguides, NIR-OLEDs or other optoelectronic devices.

show abstract

Section: Absorption Spectrasupporting

confidence: 82%

Highly fluorinated erbium(III) complexes for emission in the C-band

Martín-Ramos

Silva

Lahoz

et al. 2014

Journal of Photochemistry and Photobiology A: Chemistry

View full text Add to dashboard Cite

show abstract

“…2a and Fig. 2b) of FAP films, synthesized at 0.4% of photoinitiator (that provides the highest free internal volume of FAP film matrix, and thus, the highest concentration of embedded Ag(hfac)COD precursor [18]) and laser irradiated for 5 min (∼ 200 J/cm 2 laser doze). At least 5 -6 periodic Ag nanoparticles layers with about the same period (90 nm) are clearly seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…High optical quality fluorinated acrylic polymer (FAP) films 110±5 µm in thickness were synthesized by photopolymerization of mixture of two monomers (75% of (CH 2 =CH-COOCH 2 -CF 2 -CF 2 ) 2 and 75% of CH 2 =CH-COOCH 2 (CF 2 ) 8 H) and 0.4 -0.6% of photoinitiator (PI) (2,2-dimatoxy-1,2-dimethyltethan-1-1) as described in [18].…”

Section: Methodsmentioning

confidence: 99%

Laser-induced atomic assembling of periodic layered nanostructures of silver nanoparticles in fluoro-polymer film matrix

et al. 2010

View full text Add to dashboard Cite

Fluorinated acrylic polymer (FAP) films have been impregnated with silver precursor (Ag(hfac)COD) by supercritical fluid technique and next irradiated with laser (λ = 532 nm). Laser-chemically reduced Ag atoms have been assembled into massifs of Ag nanoparticles (3 -8 nm) in FAP/Ag(hfac)COD films matrix in the form of periodic layered nanostructures (horizontal to film surface) with unexpectedly short period (90 -180 nm). The wavelet analysis of TEM images reveals the existence of even shorter-period structures in such films. Photolysis with non-coherent light or pyrolysis of FAP/Ag(hfac)COD film results in formation of Ag nanoparticles massifs but free of any periodic nanoparticle assemblies. Our interpretation of the observed effect of laser formation of short-period nano-sized Ag nanoparticle assemblies is based on self-enhanced interference process in the course of modification of optical properties of film.

show abstract

“…Several studies on this subject have shown the doping of polymers with europium complex exploring interesting methods, such as physical mixture or doping in solution by casting or polymerization process [5][6][7][8]. Studies that describe the use of supercritical fluids as an efficient method for preparation of luminescent polymers have been hardly reported [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of luminescent polycarbonate grafted with methyl methacrylate/europium complex using supercritical CO2 technology as a green chemistry method

et al. 2012

View full text Add to dashboard Cite

Modification of polymers using supercritical carbon dioxide (scCO 2 ) impregnation technology is an advantageous method for imparting desirable properties into a new polymer formulation without the architecture of the material being affected. Methyl methacrylate (MMA) and acrylic complex of europium [Eu(TTA) 3 AA] were impregnated on polycarbonate (PC) in the scCO 2 phase. There was an increase in the amount of grafted Eu(TTA) 3 AA complex up to 6 h of impregnation, reaching 0.24% of grafting. For longer times of grafting, it was observed a small decrease in the amount of Eu(TTA) 3 AA complex in the PC polymer. On the other hand, the total amount of grafted MMA/Eu(TTA) 3 AA monomers increased for up to 10 h of impregnation. The PC-g-MMA/Eu(TTA) 3 AA copolymers showed appreciable luminescence emission at room temperature. Furthermore, the SEM images show that there was no formation of agglomerates in the structure of the copolymers over the grafting process, suggesting a excellent distribution of Eu(TTA) 3 AA complex in the copolymer matrix.

show abstract

Modification of the optical properties of fluoropolymers by supercritical fluid impregnation with europium β-diketonates

Cited by 6 publications

References 6 publications

Highly fluorinated erbium(III) complexes for emission in the C-band

Highly fluorinated erbium(III) complexes for emission in the C-band

Laser-induced atomic assembling of periodic layered nanostructures of silver nanoparticles in fluoro-polymer film matrix

Synthesis of luminescent polycarbonate grafted with methyl methacrylate/europium complex using supercritical CO2 technology as a green chemistry method

Contact Info

Product

Resources

About