Details

Autor(en) / Beteiligte

• Lv, Yaokang
• Cheng, Jun
• Matthews, Peter D
• Holgado, Juan Pedro
• Willkomm, Janina
• Leskes, Michal
• Steiner, Alexander
• Fenske, Dieter
• King, Timothy C
• Wood, Paul T
• Gan, Lihua
• Lambert, Richard M
• Wright, Dominic S

Titel

A study of the optical properties of metal-doped polyoxotitanium cages and the relationship to metal-doped titania

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2014-06, Vol.43 (23), p.8679-8689

Ort / Verlag

England

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• To what extent the presence of transition metal ions can affect the optical properties of structurally well-defined, metal-doped polyoxotitanium (POT) cages is a key question in respect to how closely these species model technologically important metal-doped TiO2. This also has direct implications to the potential applications of these organically-soluble inorganic cages as photocatalytic redox systems in chemical transformations. Measurement of the band gaps of the series of closely related polyoxotitanium cages [MnTi14(OEt)28O14(OH)2] (1), [FeTi14(OEt)28O14(OH)2] (2) and [GaTi14(OEt)28O15(OH)] (3), containing interstitial Mn(II), Fe(II) and Ga(III) dopant ions, shows that transition metal doping alone does not lower the band gaps below that of TiO2 or the corresponding metal-doped TiO2. Instead, the band gaps of these cages are within the range of values found previously for transition metal-doped TiO2 nanoparticles. The low band gaps previously reported for 1 and for a recently reported related Mn-doped POT cage appear to be the result of low band gap impurities (most likely amorphous Mn-doped TiO2).