Ion charge density governs selectivity in the formation of metal–Xylenol Orange (M–XO) complexes

Belleza, Oliver John V.; Villaraza, Aaron Joseph L.

doi:10.1016/j.inoche.2014.07.024

Cited by 23 publications

(34 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Xylenol orange is a sensitive colorimetric indicator for the presence of many heavy metal ions in solution, showing yellow in pure water but turning to red in the presence of lead ions. [34] The corresponding absorption spectra are also shown in Figure 1d. Compared to the spectrum recorded before adsorption, the spectrum of the solution after adsorption shows a decrease in absorbance at ≈580 nm and a consequent increase in absorbance at ≈435 nm, which is consistent with the spectral features of blank xylenol orange.…”

mentioning

confidence: 92%

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

Liu

Zhou

Gao

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

into the environment is essential. Various techniques have been applied to eliminate heavy metals, such as chemical precipitation, [1,2] ion exchange, [3,4] adsorption, [5] electrochemical treatment, [6] and membrane filtration. [7] Among these methods, adsorption is considered to be an effective and widely used strategy with numerous advantages, such as generality, high efficiency, relatively low cost, and possible regeneration of the adsorbent. Adsorption is realized through van der Waals forces, electrostatic attraction, ion exchange, or chemical binding between metal ions and adsorbents. Much effort has been made to develop new adsorbents and improve the performance of existing adsorbents. Recently, carbon materials, such as active carbons, [8] graphene, [9] and carbon nanotubes, [10] have been regarded as promising candidates for the adsorption of heavy metal ions due to their high specific surface areas and strong interactions with metal ions. The adsorption capacity of these carbon materials toward metal ions can be significantly increased through oxidation. [11,12] Graphdiyne is a new 2D carbon material that is composed of sp-and sp 2 -hybridized carbon atoms. [13,14] This material has attracted great attention due to its impressive properties, such as high carrier mobility, [15] high nonlinear optical susceptibility, [16] low thermal conductivity, [17] and uniformly distributed pores, which are defined by the atomic structure of graphdiyne. Graphdiyne has been proposed as a promising material for application in electronic devices, energy storage, [18] gas separation, [19,20] metal-free catalysis, [21] water purification, [22,23] etc. A number of studies have examined the synthesis of this material, and graphdiyne with different morphologies [24][25][26][27] and oligomeric subunits of graphdiyne [13,28] have been achieved. Various applications of these materials have been demonstrated by taking advantage of the electrical conductivity, holetransport properties, and morphological characteristics of graphdiyne. [29][30][31][32] The acetylenic links in graphdiyne strongly interact with metal ions (Figure 1a), which can be utilized to adsorb metal ions from water. This material shows a different manner of adsorption than that of carbon adsorbents examined in previous work, in which oxygen-containing groups are generally regarded as the adsorption sites. Herein, we present the almost complete removal of lead ions from water by using a The decontamination of water polluted with heavy metal ions is of worldwide concern. Among various treatment approaches to remove metal ions from water, adsorption is regarded as an efficient method, and a variety of materials have been applied as adsorbents for the removal of metal ions from polluted water. Recently, carbon nanomaterials have been examined as alternative adsorbents due to their high specific surface areas, high removal efficiency, and strong interactions with metal ions. Graphdiyne, a new kind of carbon allotrope composed of sp-and sp 2 -hybridized carbon atoms...

show abstract

mentioning

confidence: 92%

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

Liu

Zhou

Gao

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

“…We recently reported the use of Gd 3+ in complex with Xylenol Orange (Gd−XO, Figure ) as a colorimetric probe for determining the rates of complex formation between Gd 3+ and DO3A‐type ligands, where we observed that the method is able to distinguish between similar ligands of same denticity but different hydrophobicities. XO is able to detect free Gd 3+ in solution at the micromolar levels, and the origin of this sensitivity has been attributed to the ion charge density of the Gd 3+ ion, forming a well‐defined 1:1 stoichiometric Gd−XO complex . In this report, we describe the use of this method to monitor the rates of complex formation between Gd 3+ and a variety of polydentate ligands used in MRI contrast agent development, differing in terms of ligand denticity, backbone structure, and the nature of donor groups.…”

Section: Introductionmentioning

confidence: 99%

Relative Ligand Exchange Rates in Gd‐based MRI Contrast Agent Formation as Probed by Gd–XO Complex

Belleza

Naraga

Villaraza

2018

J Chinese Chemical Soc

Self Cite

View full text Add to dashboard Cite

A novel methodology involving the use of Gd3+–Xylenol Orange (Gd–XO), a solution colorimetric probe, was used to determine the conditional relative rates of complex formation between the Gd3+ ion and polyamino carboxylate ligands used in MRI contrast agent development. Among the ligands tested, the order of rate of Gd‐complex formation was found to be DTPA ≈ DOTP > DOTA > DO3A > DOTAM. The observed rates are an effect of ligand denticity, backbone structure, and nature of the ligand donor groups.

show abstract

“…С учетом возможности накопления измеряемых ионов в объеме гидрогеля, чувствительность метода может достигать 10 −6 M/l, что позволяет в перспективе создавать высокочувствительные малогабаритные сенсоры для экспресс-диагностики загрязнений питьевой воды на уровне ниже предельно допустимой концентрации [4]. Образование комплексов красителя ксиленовый оранжевый с ионами ряда металлов в водных растворах хорошо известно и используется, в частности, для определения содержания микроколичеств методом титрования [5]. В данной работе проведено создание и исследование нанокомпозита, чувствительный элемент которогокраситель ксиленовый оранжевый -иммобилизован на поверхности наночастиц, сшитых с полимерной гидрофильной матрицей, пленки из которой получены фотополимеризацией.…”

unclassified

Нанокомпозиционный Оптосенсор Ионов Свинца В Воде

Денисюк¹,

Игнатьева²,

Успенская³

et al. 2019

Журнал Технической Физики

View full text Add to dashboard Cite

Spectral dependences of complexation in the system of the xylenol orange dye that was immobilized on the surface of ZnO nanoparticles introduced into the volume of hydrogel and lead ions Pb^2+ have been investigated. It has been shown that the deposition of the dye on the ZnO nanoparticles leads to its binding on the surface and absence of its washing out from the hydrogel, but this process does not prevent the formation of the complexes of the dye with lead ions, which is characterized by increased absorption in the region of 580 nm. The film nanocomposite can be used as a sensor due to its high sensitivity to the presence of low lead concentrations.

show abstract

Ion charge density governs selectivity in the formation of metal–Xylenol Orange (M–XO) complexes

Cited by 23 publications

References 16 publications

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

Relative Ligand Exchange Rates in Gd‐based MRI Contrast Agent Formation as Probed by Gd–XO Complex

Нанокомпозиционный Оптосенсор Ионов Свинца В Воде

Contact Info

Product

Resources

About