Spectrophotometric Determination of Titanium with Ascorbic Acid

Hines, Edward R.; Boltz, D. F.

doi:10.1021/ac60066a007

Cited by 40 publications

(20 citation statements)

References 15 publications

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“…A similar red shift, but in localized CT complex resulting in a pronounced absorption maximum, was previously observed for Ti 4+ and catechol [40], salicylic [41], or ascorbic acid [42]. …”

Section: Resultssupporting

confidence: 76%

New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands

Janković¹,

Šaponjić²,

Džunuzović

et al. 2009

Nanoscale Res Lett

115

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Surface modification of nanocrystalline TiO2 particles (45 Å) with bidentate benzene derivatives (catechol, pyrogallol, and gallic acid) was found to alter optical properties of nanoparticles. The formation of the inner-sphere charge–transfer complexes results in a red shift of the semiconductor absorption compared to unmodified nanocrystallites. The binding structures were investigated by using FTIR spectroscopy. The investigated ligands have the optimal geometry for chelating surface Ti atoms, resulting in ring coordination complexes (catecholate type of binuclear bidentate binding–bridging) thus restoring in six-coordinated octahedral geometry of surface Ti atoms. From the Benesi–Hildebrand plot, the stability constants at pH 2 of the order 103 M−1 have been determined.

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“…A similar red shift, but in localized CT complex resulting in a pronounced absorption maximum, was previously observed for Ti 4+ and catechol [40], salicylic [41], or ascorbic acid [42]. …”

Section: Resultssupporting

confidence: 76%

New Hybrid Properties of TiO2 Nanoparticles Surface Modified With Catecholate Type Ligands

Janković¹,

Šaponjić²,

Džunuzović

et al. 2009

Nanoscale Res Lett

115

View full text Add to dashboard Cite

show abstract

“…We have also determined titanium present in the cellular lysates using spectrophotometric study of titanium-ascorbic acid reaction [35]. To the cells seeded in 6-well plates at a confluency of 70-75%, placebo ORTM nanoparticles were added at three different dosages [high (60 lg/mL), medium (30 lg/mL) and low (15 lg/mL)] in triplicates.…”

Section: In Vitro Studiesmentioning

confidence: 99%

Organically modified titania nanoparticles for sustained drug release applications

Sethi

Roy

2015

Journal of Colloid and Interface Science

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“…Three substances were tested as stabilizing agents. These were a 30 per cent sodium chloride solution suggested by Vanesch and Ramezzana (5), the thio urea solution used by Kameran and Fearen (6), and the sodium bisulfite utilized in the work of Hines and Boltz (4) . Results of the tests on these stabilizing agents ( Table 1) show clearly the superior stabilizing 3.…”

Section: Apparatus and Reagentsmentioning

confidence: 99%