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Proton conductive watery channels constructed by Anderson polyanions and lanthanide coordination cations.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2014, Vol. 43 Issue 39, p14749-14755, 7p
- Publication Year :
- 2014
-
Abstract
- A 3D inorganic-organic hybrid proton conductor, [Sm(H<subscript>2</subscript>O)<subscript>5</subscript>(CO<subscript>2</subscript>CH<subscript>2</subscript>NH<subscript>3</subscript>)<subscript>2</subscript>][Al(OH)<subscript>6</subscript>Mo<subscript>6</subscript>O<subscript>18</subscript>]·10H<subscript>2</subscript>O (1), has been synthesized by using coordination cations, [Sm(H<subscript>2</subscript>O)<subscript>5</subscript>(gly)<subscript>2</subscript>]<subscript>3</subscript><superscript>+</superscript> (gly = <superscript>-</superscript>CO<subscript>2</subscript>CH<subscript>2</subscript>NH<subscript>3</subscript> <superscript>+</superscript>), and polyanions, [Al(OH)<subscript>6</subscript>Mo<subscript>6</subscript>O<subscript>18</subscript>]<superscript>3-</superscript> ([AlMo<subscript>6</subscript>]). The polyanions ([AlMo<subscript>6</subscript>]) and the coordination cations ([Sm(H<subscript>2</subscript>O)<subscript>5</subscript>(gly)<subscript>2</subscript>]<superscript>3+</superscript>) stack to form a 3D supramolecular network structure containing 1D channels along the c axis by electrostatic force and H-bonding. Significantly, the 1D channels are water-filled with a high water content (both Sm coordinated and in lattice). Dynamic adsorption measurements were implemented at 1 atm, and 95% relative humidity (RH). The water adsorption amount (6.51 wt% at 25 °C and 5.68 wt% at 80 °C) consistent with the number of lattice water molecules of 1 suggests that the water chains were retained at elevated temperatures (80 °C) under 95% RH. Alternating-current (AC) impedance measurements of 1 reveal an outstanding conductivity for 1 of 4.53 × 10<superscript>-3</superscript> S cm<superscript>-1</superscript> at 80 °C under 95% RH. The activation energy of 1 calculated from the Arrhenius plots of the proton conductivity is 1.09 eV, which indicated that the protons transfer by a vehicle mechanism. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 43
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100112894
- Full Text :
- https://doi.org/10.1039/c4dt01715c