58176-72-0Relevant academic research and scientific papers
Proton conduction: Via lattice water molecules in oxalato-bridged lanthanide porous coordination polymers
Ishikawa, Ryuta,Ueno, Shunya,Yagishita, Sadahiro,Kumagai, Hitoshi,Breedlove, Brian K.,Kawata, Satoshi
, p. 15399 - 15405 (2016/10/13)
The proton conducting properties of two different structural types of porous coordination polymers [La2(ox)3(H2O)6]·4H2O (1) and [Er2(ox)3(H2O)6]·12H2O (2), where ox2- = oxalate, were investigated. 1 has a two-dimensional layered structure, whereas 2 has a three-dimensional structure. Both 1 and 2 have hydrophilic one-dimensional channels filled by lattice water molecules with hydrogen-bonding networks. The coordinated H2O molecules are Lewis acidic due to the lanthanoid ions donating protons to lattice-filling H2O molecules, thereby forming efficient proton conduction pathways. Alternating-current impedance analyses of 1 and 2 indicated significant proton conduction (σ = 3.35 × 10-7 S cm-1 at 368 K for 1, 1.79 × 10-6 S cm-1 at 363 K for 2 under RH = 100%, with Ea = 0.35 eV for 1 and 0.47 eV for 2), which was attributed to the Grotthuss mechanism via the lattice H2O molecules.
THERMAL ANALYSIS OF THE OXALATE HEXAHYDRATES AND DECAHYDRATES OF YTTRIUM AND THE LANTHANIDE ELEMENTS.
Fuller,Pinkstone
, p. 127 - 142 (2008/10/08)
Simultaneous thermogravimetry and differential thermal analysis data are presented for yttrium and the tervalent lathanide oxalate decahydrates (Y, La - Er excluding Pm) and hexahydrates (Y, Er - Lu). The dehydration and the oxalate and intermediate dioxy
