| 79874-23-0

• CAS: 79874-23-0
• 化学式: H*Mn*Mo₁₂O₄₀P
• 分子量: 1878.18
• InChiKey: VGNNHFBVVDJWKL-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  phosphomolybdic acid 、 alkaline earth salt of/the/ methylsulfuric acid 以 水 为溶剂， 生成
  参考文献：
  名称：

  Electronic Activity Relationship for Methacrolein Formation Over 4th Period Transition Metal Phosphomolybdates

  摘要：

  Phosphomolybdate compounds have been investigated for their structural characteristics and oxidation activity toward isobutane. The phosphomolybdates were synthesized from phosphomolybdic acid and the fourth period transition metal cations Cr3+, Mn2+, Fe3+, Fe2+, Co2+, Ni2+ Cu2+, Cu+ and Zn2+. Two compounds were synthesized per transition metal: where (i) all the protons had been replaced by the particular transition metal, and (ii) only partial proton replacement leaving a single proton per phosphomolybdate. X-ray diffraction analysis has shown that a primitive cubic phase is apparent with some of the transition metal phosphomolybdates. Each solid was exposed to isobutane using the anaerobic low-pressure steady-state technique. Category 1 exponential-like distributions of methacrolein were observed with all the transition metal phosphomolybdates, except the lower oxidation state iron and copper salts, Fe-1.5[PMo12O40] and Cu-3[PMo12O40] respectively. Activation energies ranged from 51.31 +/- A 0.27 kJ mol(-1) (Cr[PMo12O40]) to over 200 kJ mol(-1) (Zn-1.5[PMo12O40]). Phosphomolybdates with counter cations which are one or two electrons deficient from either a 3d (5) or 3d (10) configuration (in this case 3d (3), 3d (8) or 3d (9)) had the lowest activation barriers for methacrolein formation. A computational investigation into HOMO-LUMO band gap energies agrees with the association. The presence of protons also enhances Category 1 product formation and may be attributed to migration of H+ through the bulk of the solid.

  DOI：

  10.1007/s10562-012-0917-y

文献信息

• Hydroxylation of phenol by hydrogen peroxide catalyzed by heteropoly compounds in presence of glycerol as green solvent
  作者：K. Pamin、J. Połtowicz、M. Prończuk、S. Basąg、J. Maciejewska、J. Kryściak-Czerwenka、R. Tokarz-Sobieraj

  DOI：10.1016/j.cattod.2015.03.003

  日期：2015.11

  Cobalt, manganese, and iron in cationic positions of the secondary structure of Mo- or W-Keggin type heteropolyanions were investigated in the liquid-phase oxidation of phenol in glycerol. Iron tungstophosphate series is the most active in this reaction, yielding catechol and hydroquinone. On the other hand, manganese and cobalt salts of heteropolyacids demonstrate higher catalytic activity in the degradation of phenol to CO2 in comparison with iron tungstophosphates. It is the first time that glycerol is used as alternative "green" solvent in phenol oxidation reaction. (C) 2015 Elsevier B.V. All rights reserved.