Ionizing radiation induced degradation of poly (2-methoxy-5-(2’-ethyl-hexyloxy) -1,4-phenylene vinylene) in solution

Bronze‐Uhle, Erika S.; Batagin‐Neto, Augusto; Lavarda, Francisco Carlos; Graeff, Carlos Frederico de Oliveira

doi:10.1063/1.3644946

Cited by 37 publications

(33 citation statements)

References 44 publications

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“…In general, these indices describe how the frontier orbitals are modified when the number of electrons is changed and are employed to understand and predict the reactivity of molecules and polymers [14][15][16] . According to the type of reaction, three distinct CAFIs are defined.…”

Section: Methodsmentioning

confidence: 99%

Theoretical investigation of geometric configurations and vibrational spectra in citric acid complexes

et al. 2014

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The performance of advanced electronic ceramics is directly related to the synthesis route employed. Sol-gel methods are widely used for this purpose. However, the physicochemical intermediate steps are still not well understood. Better understanding and control of these processes can improve the final quality of samples. In this work, we studied theoretically the formation of metal complexes between citric acid and lithium or barium metal cations with different citric acid/metal proportions, using Density Functional Theory electronic structure calculations. Infrared and Raman scattering spectra were simulated for the more stable geometric configurations. Using this methodology, we identified some features of complexes formed in the synthesis process. Our results show that the complexes can be distinguished by changes in the bands assigned to C=O, COH-, and COO -group vibrations. An estimate of the most stable complexes is made based on total energy.

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Section: Methodsmentioning

confidence: 99%

Theoretical investigation of geometric configurations and vibrational spectra in citric acid complexes

et al. 2014

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“…In the literature, it is shown that radiative damage [20] and electrical stress [14] enhances the MC. This would suggest traps created through structural changes or ionization [46] are at the origin of the MC. Finally, we also suggested that an exciton or trion can form on an intrinsic trap, but not on F4TCNQ.…”

Section: -5mentioning

confidence: 99%

Investigating the influence of traps on organic magnetoresistance by molecular doping

et al. 2014

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“…These subsequently attack the highly susceptible vinyl regions as proposed by Bronze-Uhle et al [18,19].…”

Section: Resultsmentioning

confidence: 96%

Kinetic studies of the photo-degradation of poly(arylene vinylenes)

O’Neill¹,

Lynch²,

McGoldrick

et al. 2012

Journal of Luminescence

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe kinetics of the degradation of a homologous series of Poly phenylene vinylenes in which the phenylene units of the PPV structure are systematically substituted by naphthyl and anthyrl units is presented. Degradation is monitored according to the decay of the long wavelength absorption maximum upon illumination with UV radiation. Compared to Toluene solution, the photo-degradation is seen to be accelerated in Chloroform solution. All decays are fitted with first order kinetics. It is found that all substitutions improve the stability of the vinylene polymers against decay.In particular the highly electro-negative naphthyl group serves to drastically increase the stability due to electron depletion across the vinyl bond. The decay rate is shown to correlate well with the variation of the electronic properties of the backbone and with the reduction of vinylene bond strength as measured using Raman spectroscopy.

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Ionizing radiation induced degradation of poly (2-methoxy-5-(2’-ethyl-hexyloxy) -1,4-phenylene vinylene) in solution

Cited by 37 publications

References 44 publications

Theoretical investigation of geometric configurations and vibrational spectra in citric acid complexes

Theoretical investigation of geometric configurations and vibrational spectra in citric acid complexes

Investigating the influence of traps on organic magnetoresistance by molecular doping

Kinetic studies of the photo-degradation of poly(arylene vinylenes)

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