OH-related infrared absorption bands in oxide glasses

Navarra, Giovanna; Iliopoulos, Ioannis; Militello, Valeria; Rotolo, Silvio G.; Leone, Maurizio

doi:10.1016/j.jnoncrysol.2005.04.018

Cited by 37 publications

(23 citation statements)

References 11 publications

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“…The peak at 3900 cm -1 is ascribed to a combination of various ≡Si−OH vibration modes. 2,26 In contrast to the previous cases, where the peak at 3640 cm -1 was artificially replaced by two smaller based on prior knowledge of the system under investigation, in the present case the two peaks at 3600 and 3700 cm -1 showed up in the derivative curves which were assigned to the 3595-3625 cm -1 and 3660-3670 cm -1 peak ranges of Figure 1. Due to the same reason mentioned for Spectrum 1, curve fitting with pure Lorentzian peaks was successful only by excluding the small peak at 3080 cm -1 .…”

Section: Spectrum 3: 14 Days Ageing At Room Temperature and Under Comcontrasting

confidence: 78%

Peak separation by derivative spectroscopy applied to ftir analysis of hydrolized silica

Aragão¹,

Messaddeq²

2008

J. Braz. Chem. Soc.

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A análise espectral só se torna confiável se o espectro é detalhadamente analisado quanto a todos os picos sobrepostos e ocultos. Neste trabalho são descritas as etapas para revelar e separar esses picos na faixa de 3000-4000 cm -1 em três espectros de absorção de infravermelho colhidos na superfície vítrea de fibras ópticas de sílica hidrolizada. A revelação dos picos foi feita com a análise da segunda e quarta derivada dos dados experimentais digitalizados, juntamente com o conhecimento disponível de espectroscopia de infravermelho da interação sílica-água na faixa espectral investigada. A separação de picos foi realizada com ajuste de curva usando quatro modelos distintos. O melhor ajuste foi alcançado com um modelo que descrevia os espectros com uma soma de picos do tipo Gaussiano. Mapas descrevendo os limites de ombro ("shoulder limits") e de detecção foram utilizados para validar os detalhes espectrais revelados.Reliable spectral analysis is only achieved if the spectrum is thoroughly investigated in regard to all hidden and overlapped peaks. This paper describes the steps undertaken to find and separate such peaks in the range of 3000 to 4000 cm -1 in the case of three different infrared absorption spectra of the glass surface of hydrolyzed silica optical fibers. Peak finding was done by the analysis of the second and fourth derivatives of the digital data, coupled with the available knowledge of infrared spectroscopy of silica-water interaction in the investigated range. Peak separation was accomplished by curve fitting with four different models. The model with the best fit was described by a sum of pure Gaussian peaks. Shoulder limit and detection limit maps were used to validate the revealed spectral features.

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Section: Spectrum 3: 14 Days Ageing At Room Temperature and Under Comcontrasting

confidence: 78%

Peak separation by derivative spectroscopy applied to ftir analysis of hydrolized silica

Aragão¹,

Messaddeq²

2008

J. Braz. Chem. Soc.

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“…According to works of Efimov et al (Efimov et al, 2003) and Navarra et al (Navarra et al, 2005) on the silicate glasses hydration, it was observed the existence of the following infrared bands: 3595-3605 cm -1 attributed to OH stretching mode in SiOH. 3515-3518 cm -1 attributed to OH stretching mode in the bound water silanol groups.…”

Section: Infrared Resultsmentioning

confidence: 95%

The French SON68 Glass Vapor Hydration under Different Atmospheres

Chaou

Abdelouas

Mendili

et al. 2014

Procedia Materials Science

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“…Due to the importance of silica based glasses in the optical fibre industry, these bands have been extensively studied since these defects play an important role in determining behavioural properties such as radiative heat transfer during melting or annealing and the efficiency of luminescence activity [64][65][66][67][68][69][70][71]. Early on, Scholze [72] For oxide glasses, Navara et al [73] observed a red-shift relative to silica glass in the composite band at ∼ 3670 cm − 1 due to free (Si)O-H groups and H 2 O molecules, along with a compositional dependency of bands in the 2500-3200 cm − 1 region. Although nominally anhydrous, mineral pyroxenes have long been known to contain small quantities of OH in the form of amphibole lamellae at the O sites within the pyroxene structure, or with cation substitutions or vacancies capable of compensating for the H + ionic charge [74].…”

Section: Hydrationmentioning

confidence: 99%