Photogeneration of titanium(III) from titanium(IV) citrate in aqueous solution

Jan Paradies; Jane Crudass; Fiona MacKay; Lesley J. Yellowlees; James Montgomery; Simon Parsons; Iain Oswald; Neil Robertson; Peter J. Sadler

doi:10.1016/j.jinorgbio.2006.02.011

Photogeneration of titanium(III) from titanium(IV) citrate in aqueous solution

Jan Paradies, Jane Crudass, Fiona MacKay, Lesley J. Yellowlees, James Montgomery, Simon Parsons, Iain Oswald, Neil Robertson^*, Peter J. Sadler

^*Corresponding author for this work

Strathclyde Institute Of Pharmacy And Biomedical Sciences

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

Current interest in the biochemistry of Ti(IV) arises from its widespread use in white pigments and its potential in therapeutic agents. Citrate is known to form strong complexes with Ti(IV). We show here that Ti(III) citrate is generated in a facile manner and in good yield by the action of UV radiation on Ti(IV) citrate in aqueous solution. The Ti(III)-citrate species formed was isolated and characterised by UV-Visible spectroscopy, showing an absorption at 547 nm (ε = 100 M^-1 cm^-1), and by electron paramagnetic resonance (EPR) spectroscopy giving a resonance at g = 1.949 (linewidth = 60 G) . An X-ray structure of the parent Ti(IV) complex in the form [TiNa₃(C₆H₆O₇)₂(C₆H₅O₇)(H₂O)_6.8] · 2H₂O is reported along with a study of the reaction of Ti(IV)-citrate with N,N-ethylenebis(o-hydroxytoluene)glycine (EHTG), which was more rapid than those of other related Ti(IV) complexes.

Original language	English
Pages (from-to)	1260-1264
Number of pages	5
Journal	Journal of Inorganic Biochemistry
Volume	100
Issue number	7
DOIs	https://doi.org/10.1016/j.jinorgbio.2006.02.011
Publication status	Published - 31 Jul 2006

Keywords

citrate
EHTG
photoreduction
titanium
x-ray structure

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10.1016/j.jinorgbio.2006.02.011

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title = "Photogeneration of titanium(III) from titanium(IV) citrate in aqueous solution",

abstract = "Current interest in the biochemistry of Ti(IV) arises from its widespread use in white pigments and its potential in therapeutic agents. Citrate is known to form strong complexes with Ti(IV). We show here that Ti(III) citrate is generated in a facile manner and in good yield by the action of UV radiation on Ti(IV) citrate in aqueous solution. The Ti(III)-citrate species formed was isolated and characterised by UV-Visible spectroscopy, showing an absorption at 547 nm (ε = 100 M-1 cm-1), and by electron paramagnetic resonance (EPR) spectroscopy giving a resonance at g = 1.949 (linewidth = 60 G) . An X-ray structure of the parent Ti(IV) complex in the form [TiNa3(C6H6O7)2(C6H5O7)(H2O)6.8] · 2H2O is reported along with a study of the reaction of Ti(IV)-citrate with N,N-ethylenebis(o-hydroxytoluene)glycine (EHTG), which was more rapid than those of other related Ti(IV) complexes.",

keywords = "citrate, EHTG, photoreduction, titanium, x-ray structure",

author = "Jan Paradies and Jane Crudass and Fiona MacKay and Yellowlees, {Lesley J.} and James Montgomery and Simon Parsons and Iain Oswald and Neil Robertson and Sadler, {Peter J.}",

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AU - Paradies, Jan

AU - Crudass, Jane

AU - MacKay, Fiona

AU - Yellowlees, Lesley J.

AU - Montgomery, James

AU - Parsons, Simon

AU - Oswald, Iain

AU - Robertson, Neil

AU - Sadler, Peter J.

PY - 2006/7/31

Y1 - 2006/7/31

N2 - Current interest in the biochemistry of Ti(IV) arises from its widespread use in white pigments and its potential in therapeutic agents. Citrate is known to form strong complexes with Ti(IV). We show here that Ti(III) citrate is generated in a facile manner and in good yield by the action of UV radiation on Ti(IV) citrate in aqueous solution. The Ti(III)-citrate species formed was isolated and characterised by UV-Visible spectroscopy, showing an absorption at 547 nm (ε = 100 M-1 cm-1), and by electron paramagnetic resonance (EPR) spectroscopy giving a resonance at g = 1.949 (linewidth = 60 G) . An X-ray structure of the parent Ti(IV) complex in the form [TiNa3(C6H6O7)2(C6H5O7)(H2O)6.8] · 2H2O is reported along with a study of the reaction of Ti(IV)-citrate with N,N-ethylenebis(o-hydroxytoluene)glycine (EHTG), which was more rapid than those of other related Ti(IV) complexes.

AB - Current interest in the biochemistry of Ti(IV) arises from its widespread use in white pigments and its potential in therapeutic agents. Citrate is known to form strong complexes with Ti(IV). We show here that Ti(III) citrate is generated in a facile manner and in good yield by the action of UV radiation on Ti(IV) citrate in aqueous solution. The Ti(III)-citrate species formed was isolated and characterised by UV-Visible spectroscopy, showing an absorption at 547 nm (ε = 100 M-1 cm-1), and by electron paramagnetic resonance (EPR) spectroscopy giving a resonance at g = 1.949 (linewidth = 60 G) . An X-ray structure of the parent Ti(IV) complex in the form [TiNa3(C6H6O7)2(C6H5O7)(H2O)6.8] · 2H2O is reported along with a study of the reaction of Ti(IV)-citrate with N,N-ethylenebis(o-hydroxytoluene)glycine (EHTG), which was more rapid than those of other related Ti(IV) complexes.

KW - citrate

KW - EHTG

KW - photoreduction

KW - titanium

KW - x-ray structure

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DO - 10.1016/j.jinorgbio.2006.02.011

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SN - 0162-0134

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EP - 1264

JO - Journal of Inorganic Biochemistry

JF - Journal of Inorganic Biochemistry

IS - 7

ER -

Photogeneration of titanium(III) from titanium(IV) citrate in aqueous solution

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Keywords

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