Infrared Absorption Spectra of Some Na-Borosilicate Glasses Containing AgBr and Cu2O (Photochromic Glasses) in Addition to One of Transition Metal Oxide

Abstract

Infrared absorption spectroscopy measurements for a number of Na-borosilicate glasses containing AgBr and Cu 2 O were carried out in order to elucidate the structure of these glasses and the forms in which the transition metal ions exist in it. The raw materials used were of chemically pure grade and were finely pulverized. The temperature of the melting was 1,450°C for 2 h and the samples were then annealed at 480°C. The prepared glasses studied were then heat treated at 600°C for 1 h and cooled inside the furnace. The absorption measurements in the Infrared region of the spectrum were recorded in range of (4,000-400) cm −1 using a Jacso FT-IR 300E Infrared spectrophotometer for all glasses studied. The experimental results obtained showed characteristic variations of the position and intensity of the absorption bands with the glass composition. The effect of the different transition metal oxides on the deformation of the groups present was investigated.

Up‐Converted Long Persistent Luminescence from CsPbBr3 Nanocrystals in Glass

“…The peak at 1490 cm −1 is attributed to non‐bridging oxygen stretching vibrations. [ 19 ] Compared with CsPbBr 3 GCs, the intensity of non‐bridging oxygen vibrations increases of the La 3+ and Dy 3+ doping samples, while that of the Nd 3+ and Lu 3+ doping samples declines markedly. The results are in good consistent with the observed LPL performance of the Ln 3+ doped GCs, indicating the modulation of the LPL behavior is critically dependent on the concentration changes of nonbridging oxygen of CsPbBr 3 GCs.…”

Borosilicates Obtained by Sol–Gel Method

“…7, it can be noticed that the absorption bands appearing at about 3450 cm À1 can be assigned to water molecules, in which some of the OH group glass powder during measurements, and KBr absorbs moisture and remained in the disks (Marzouk et al 2013;Rajesh et al 2013). The band at 3000-2800 cm À1 originates from hydrogen bonding, and the band in the region of 2400-2300 cm À1 is due to the hydrogen-bonded OH-stretching vibrations (Saad et al 2011). The band appearing at about 1645 cm À1 may be assigned to vibrations of water in these samples (Efimov and Pogareva 2000).…”