Tris(2-methyl-8-quinolinolato)gallium(III) as a Fluorescent Probe for Sensitive Silanol-Testing

Uehara, Nobuo; Kawata, Sumiko; Shimizu, Tokuo

doi:10.2116/analsci.21.1099

Cited by 3 publications

(7 citation statements)

References 26 publications

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“…Therefore, if we monitor the absorption at 560 nm, we can avoid the interference of any excess of ligand added in the eluent to suppress the dissociation of the complex as well as avoiding the interference of the ligand with fluorescent detection in the case of the gallium(III) complex. 26 The concentration of 2-methyl-8-quinolinol in the eluent used did not influence the retention time of the iron(III) complex. 2-Methyl-8-quinolinol in the stationary phase can be easily removed by rinsing with methanol, followed by a diluted acetic acid solution.…”

Section: Detection Of Iron(iii) Complexmentioning

confidence: 90%

“…In previous papers, 25,26 we reported that the iron(III) complex not only gave a similar response to tris(2-methyl-8-quinolinolato)gallium(III) for silanol groups, but also showed a wide visible absorption band, which enabled detection of the complex without any interference from the ligand added into the eluent of the iron(III) complex, even with the spectrophotometric detection. 26 Here, we describe a comparison of the iron(III) complex with some silanol-detecting tests using nitrogen-containing compounds, which shows that the iron(III) complex works as a sensitive silanol-detecting probe as well as tris(2-methyl-8-quinolinolato)gallium(III).…”

Section: Introductionmentioning

confidence: 87%

“…Although the plots between the peak height of the iron(III) complex and the output of T1 and T2 tests are not linear, the distinct relationships indicate that the iron(III) complex can be an alternative silanol probe, as well as the gallium(III) complex. 26 A drastic decrease in the peak height of the iron(III) complex with an increase of the outputs of the T1 and T2 tests indicates the high sensitivity of the iron(III) complex. We compared the sensitivity of the iron(III) complex with that of the gallium(III) complex 26 in terms of a comparison of the outputs of the T1 and T2 tests, and found that the gallium(III) complex was more sensitive than the iron(III) complex.…”

Section: Comparison Of Silanol Tests Using Nitrogen-containing Compoundsmentioning

confidence: 97%

“…26 A drastic decrease in the peak height of the iron(III) complex with an increase of the outputs of the T1 and T2 tests indicates the high sensitivity of the iron(III) complex. We compared the sensitivity of the iron(III) complex with that of the gallium(III) complex 26 in terms of a comparison of the outputs of the T1 and T2 tests, and found that the gallium(III) complex was more sensitive than the iron(III) complex.…”

Section: Comparison Of Silanol Tests Using Nitrogen-containing Compoundsmentioning

confidence: 97%

“…As an indicator of the silanol groups, the peak height of the iron(III) complex was superior to other parameters of the peak profile as an output for detecting a silanol group, as found for the gallium(III) complex. 26 Accurate peak areas of the iron(III) ; silica gel, 80 -100 mesh (column chromatography grade). Fig.…”

Section: Application To Commercially Available Ods Columnsmentioning

confidence: 99%

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Tris(2-methyl-8-quinolinolato)iron(III) as a Novel Spectrophotometric Probe for Silanol Detection

2006

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Tris(2-methyl-8-quinolinolato)iron(III) was proposed as a sensitive spectrophotometric silanol-detecting probe based on the coordination ability of silanol groups on the surface of octadecylsylanized silica gel (ODS silica gel) for reversedphase high-performance liquid chromatography. A peak of the iron(III) complex on a chromatogram abruptly collapsed as the silanol content in an ODS column increased, indicating that the iron(III) complex could sense trace amounts of silanol groups. The change of the peak parameters, such as the peak height and the peak area was highly related to the output of some nitrogen-containing compounds used as silanol-detecting probes as a function of the silanol content in an ODS column. The response of the peak height of the iron(III) complex to the silanol content was much more sensitive than the response of the nitrogen-containing probes, and was comparable to that of tris(2-methyl-8-quinolinolato)gallium(III), which had been proposed as a fluorometric silanol-detecting probe based on the coordination ability of the silanol groups.

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Section: Detection Of Iron(iii) Complexmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 87%

Section: Comparison Of Silanol Tests Using Nitrogen-containing Compoundsmentioning

confidence: 97%

Section: Comparison Of Silanol Tests Using Nitrogen-containing Compoundsmentioning

confidence: 97%

Section: Application To Commercially Available Ods Columnsmentioning

confidence: 99%

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Tris(2-methyl-8-quinolinolato)iron(III) as a Novel Spectrophotometric Probe for Silanol Detection

2006

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ESIPT-based ratiometric fluorescent probe for highly selective and sensitive sensing and bioimaging of group IIIA ions in living cancer cells and zebrafish

Wang

LileiZhang

et al. 2020

Dyes and Pigments

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Roles of Residual Silanol in Solid Phase Extraction of Copper to Octadecylsilyl Silica in the Presence of Acetylacetone

et al. 2020

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Batchwise studies have demonstrated that the retention of acetylacetone (Haa) from an aqueous phase in non-endcapped octadecylsilyl (ODS) silica with silanol intentionally left (NEC) is stronger than the retention in endcapped ODS silica under ambient pressure, due to the enhanced wettability and the contribution of adsorption to silanol (-SiOH), as well as the distribution into the ODS phase. Equilibrium analysis on solid phase extraction (SPE) of copper ion with Haa to NEC has indicated the adsorption of 1:1 species by the proton replacement reaction with silanol to give [-SiOCu(aa)] at relatively low Haa concentrations and the adsorption of [Cu(aa)2] to silanol, as well as the distribution of [Cu(aa)2] into the ODS phase. These adsorbed-and distributed-species of the same composition could be differentiated by ESR spectroscopy. The advantages of residual silanol in SPE of metal ions are discussed.

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Tris(2-methyl-8-quinolinolato)gallium(III) as a Fluorescent Probe for Sensitive Silanol-Testing

Cited by 3 publications

References 26 publications

Tris(2-methyl-8-quinolinolato)iron(III) as a Novel Spectrophotometric Probe for Silanol Detection

Tris(2-methyl-8-quinolinolato)iron(III) as a Novel Spectrophotometric Probe for Silanol Detection

ESIPT-based ratiometric fluorescent probe for highly selective and sensitive sensing and bioimaging of group IIIA ions in living cancer cells and zebrafish

Roles of Residual Silanol in Solid Phase Extraction of Copper to Octadecylsilyl Silica in the Presence of Acetylacetone

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