Studies on Sulfate Iron(II) Complex With Tris(pyrazol-1-yl)methane Exhibiting Spin Crossover in Aqueous Solutions

Vasily V. Kokovkin, Igor V. Mironov, Evgenii V. Korotaev, Vladimir R. Shayapov, Olga G. Shakirova, Ludmila G. Lavrenova

Результат исследования: Научные публикации в периодических изданияхстатья

Аннотация

Using the methods of UV-, VIS- and near-IR spectrometry, potentiometry, static magnetic susceptibility and cyclic voltammetry, an iron(II) complex with tris(pyrazol-1-yl)methane (L) having the composition of [FeL2]SO4 is studied in aqueous solution. In the solid state this compound exhibits spin crossover 1A15T2. The protonation constants of L (log K1H=2.53, log K2H=1.80) and stability constants of the complex (log β(FeL2+)≈ 4, log β(FeL2 2+)=8.62) at t = 25°C, I=0.05 M have been determined. The studies on μeff(T) of [FeL2]SO4 in solution in the temperature range from 280 to 355 K have shown that the value of μeff exhibits an increase with increasing temperature. This indicates that with increasing temperature a transition occurs from the low spin (LS) state of the complex to the high spin (HS) state thereof.

Язык оригиналаанглийский
Страницы (с-по)9360-9366
Число страниц7
ЖурналChemistrySelect
Том4
Номер выпуска32
DOI
СостояниеОпубликовано - 29 авг 2019

Fingerprint Подробные сведения о темах исследования «Studies on Sulfate Iron(II) Complex With Tris(pyrazol-1-yl)methane Exhibiting Spin Crossover in Aqueous Solutions». Вместе они формируют уникальный семантический отпечаток (fingerprint).

  • Цитировать