Complexation of gallium(III) nitrate with 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis(methylenephosphonic acid)


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Eight dissociation constants of 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakis (methylene phosphonic acid) (DOTMP, H8L) were determined for the first time by potentiometric titration in water using the CHEMEQUI program. The stability constants of Ga3+ complexes with deprotonated forms of DOTMP were determined. The stability constant of the Ga3+ complex with the fully deprotonated DOTMP ligand, lg KML equal to 27.8, is higher than the corresponding constant for the Ga3+ complex with 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), the ligand most widely used in radiopharmacy; it is also higher than the constant for the Ga3+ complex with plasma protein transferrin, which makes the DOTMP ligand very promising for the use in radiopharmacy.

作者简介

G. Tsebrikova

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

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Email: tsebrikova@yandex.ru
俄罗斯联邦, Build. 4, 31 Leninsky prosp., Moscow, 119071

R. Barsamian

Russian Technological University, Lomonosov Moscow State University of Fine Chemical Technologies

Email: tsebrikova@yandex.ru
俄罗斯联邦, 78 prosp. Vernadskogo, Moscow, 119454

V. Solov´ev

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: tsebrikova@yandex.ru
俄罗斯联邦, Build. 4, 31 Leninsky prosp., Moscow, 119071

Z. Kudryashova

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences; Russian Technological University, Lomonosov Moscow State University of Fine Chemical Technologies

Email: tsebrikova@yandex.ru
俄罗斯联邦, Build. 4, 31 Leninsky prosp., Moscow, 119071; 78 prosp. Vernadskogo, Moscow, 119454

V. Baulin

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences; Institute of Physiologically Active Compounds, Russian Academy of Sciences

Email: tsebrikova@yandex.ru
俄罗斯联邦, Build. 4, 31 Leninsky prosp., Moscow, 119071; 1 Severnyi proezd, Chernogolovka, Moscow Region, 142432

Y. Wang

School of Materials Science and Engineering, Harbin Institute of Technology

Email: tsebrikova@yandex.ru
中国, 92 West Dashi st., Harbin, 150001

A. Tsivadze

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: tsebrikova@yandex.ru
俄罗斯联邦, Build. 4, 31 Leninsky prosp., Moscow, 119071

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