Application of pyridine-2-carbaldehyde-2-(4-methyl-1,3-benzo thiazol-2-yl)hydrazone as a neutral ionophore in the construction of a novel Er(III) sensor

Abstract

A piridina-2-carbaldeído-2-(4-metil-1,3-benzotiazol-2-il) hidrazona (PCMHT) pode ser usada como um ionóforo neutro apropriado à preparação de uma membrana sensora a Er(III), com alta seletividade. A composição ótima encontrada foi PCMHT-PVC-KTpClPB-BA com as razões de 6,0:30,0:5,0:59,0 . A excelente seletividade a Er(III) do sensor proposto, frente aos íons metálicos mais comuns e, especialmente íons lantanídeos, é uma outra vantagem. O sensor foi usado com sucesso como eletrodo indicador na titulação de 25 mL de 1,0 × 10 -4 mol L -1 de íons Er(III) com 1,0 × 10 -2 mol L -1 de EDTA. O sensor proposto foi usado na monitoração direta de Er(III) em misturas binárias e na determinação indireta de íons fluoreto em duas preparações de enxágüe bucal.We found that pyridine-2-carbaldehyde-2-(4-methyl-1,3-benzothiazol-2-yl) hydrazone (PCMHT) can be used as a suitable neutral ionophore for preparing an Er(III) membrane sensor with high selectivity. The optimum composition was found to be PCMHT-PVC-KTpClPB-BA with the ratios of 6.0:30.0:5.0:59.0, respectively. The Nernstian response was of 21.8 ± 0.5 mV decade -1 of Er(III) activity, the linear range of the sensor was found to be relatively wide (from 1.0×10 -5 to 1.0 ×10 -2 mol L -1). Its applicability pH range of 2.5-12.0 seems to make it suitable for analytical applications. EDTA. The proposed sensor was used for direct monitoring of Er(III) in binary mixtures and indirect determination of fluoride ions in two mouth wash preparations.

Multi-walled carbon nanotubes (MWCNTs) and room temperature ionic liquids (RTILs) carbon paste Er(III) sensor based on a new derivative of dansyl chloride

“…19.1 ± 0.3 7.6 × 10 −8 10 18.9 ± 0.3 7.5 × 10 −8 11 18.7 ± 0.5 7.8 × 10 −8 12 18.8 ± 0.3 7.9 × 10 −8 13 17.9 ± 0.2 1.5 × 10 −7 14 17.8 ± 0.3 1.9 × 10 −7 15 17.6 ± 0.3 2.5 × 10 −7 3.8. Tempreature effect on potential response of the sensor Fig.…”

“…A survey of the literature found only four reports on Er(III) ion-selective and wire coated sensors [13][14][15][16], and no reports of Er(III) carbon paste electrodes. In this work, for the first time, a highly selective and sensitive Er(III) modified carbon paste electrode based on [5-(dimethylamino) naphthalene-1-sulfonyl 4-phenylsemicarbazide] (NSP), room temperature ionic liquids (RTILs) and multi-walled carbon nanotubes (MWCNTs) is studied (Fig.…”

1,1′-[4-(4-Methoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-diyl]diethanone

“…(Xia et al, 2005). Pyridine derivatives can be used as a suitable neutral ionophore for preparing an Er(III) membrane sensor with high selectivity, which are utilized for direct monitoring of Er(III) in binary mixtures and indirect determination of fluoride ions in mouth wash preparations (Ganjali et al, 2007).…”

Ion Recognition: Application of Symmetric and Asymmetric Schiff Bases and Their Complexes for the Fabrication of Cationic and Anionic Membrane Sensors to Determine Ions in Real Samples

“…One in 2006 by Ganjali et al, who created an Er 3+ hydrazone based sensor, presenting a detection limit of 7.0 10 8 M [85]. The other one in 2007 by Ganjali et al, who found that pyridine-2-carbaldehyde-2-(4-methyl-1,3-benzothiazol-2-yl) hydrazone (PCMHT) could be used as a suitable neutral ionophore [86]. Table 3 is thulium.…”