Facile synthesis of an optical sensor for CO₃²⁻and HCO₃⁻detection

New p-type Al-substituted SrSnO3 perovskites for TCO applications?

“…All spectra are similar and show two distinct zones: one strong optical absorption zone in the range 270-400 nm, which is attributed to the transition from the VBM (predominant O(2p) states) to the CBM (predominant Sn(5s,p)). Wide and less intense bands are then observed around 500 nm that can be assigned to carbonate-type impurities (known to absorb in that region 35 ). The amplitude of these bands decreases with the increase of xAl Sn , consistently with the progressive decrease of the amount of SrCO 3 impurity.…”

Schiff Base Functionalized 1,2,4-Triazole and Pyrene Derivatives for Selective and Sensitive Detection of Cu2+ in the Mixed Organic- Aqueous Media

“…Many compounds are being synthesized with chemistry-sensors, among the heterocyclic compounds, the 5 membered ring compound 4-Amino-1,2,4-Triazole-3-thiol derivative has an amine group and thiol group, so the amine group reacts easily with aldehyde to become a Schiff base (Imine) group and can be used as a chemosensor. Schiff base is synthesized by simple experiments under simple conditions and is a good functional group for use in chemical sensors because of the simple structure of the double bond between nitrogen and carbon and the unshared electron pair of nitrogen [13]. In addition, there are more opportunities to bind with ions due to the sulfur in the thiol group.…”

“…These reagents used without further puri cation. 13 C and 1 H NMR were measured at 126 MHz, 500 MHz, and 400 MHz with a Bruker Avance (Germany) NMR Spectrophotometer using DMSO-d 6 . Mass spectrometry (LC-MS) was measured using a 2975/ZQ2000 (waters) spectrometer.…”

“…Hz, 1H, Ar) 13. C NMR (126 MHz, DMSO) δ 164.60, 162.46, 147.95, 133.82, 131.78, 130.60, 130.55, 130.29, 129.90, 129.73, 129.69, 127.28, 126.83, 126.77, 126.51, 125.32, 125.16, 124.74, 124.34, 124.32, 123.82, 123.36, 122.06.…”

All-solid-state carbonate-selective electrode based on screen-printed carbon paste electrode

“…Carbonate ions in water can have three forms: carbonate ion (CO3 2-), hydrogen carbonate (HCO3 -) and carbon dioxide (CO2), and there is an equilibrium among them. Many methods have been proposed for detecting carbonate, for example optical sensors, titration, ion chromatography and others [5][6][7]. However, these methods are usually conducted in a laboratory and require expensive equipment, complex sample treatment and technical expertise.…”