scholarly journals Investigating the effect of positional isomerism on the assembly of zirconium phosphonates based on tritopic linkers

2020 ◽  
Vol 49 (12) ◽  
pp. 3662-3666 ◽  
Author(s):  
Marco Taddei ◽  
Stephen J. I. Shearan ◽  
Anna Donnadio ◽  
Mario Casciola ◽  
Riccardo Vivani ◽  
...  
Keyword(s):  
Proton Conductivity ◽  
Layered Compound ◽  
The Novel ◽  
Zirconium Phosphonates ◽  
Positional Isomerism

Combination of the novel linker 2,4,6-tris[3-(phosphonomethyl)phenyl]-1,3,5-triazine and Zr(iv) afforded a layered compound that lacks extended inorganic connectivity and displays good proton conductivity.

Synthesis and structure determination of the novel aluminophosphate TL-1: A new layered compound with corner-sharing AlX6 chains

2016 ◽  
Vol 242 ◽  
pp. 38-46 ◽  
Author(s):  
Linda Pastero ◽  
Rossella Arletti ◽  
Fernando Cámara ◽  
Lara Gigli ◽  
Monica Cagnoni
Keyword(s):  
Structure Determination ◽  
Layered Compound ◽  
The Novel

Preparation and Proton Conductivity of a Novel Polymer Composite Membrane PVDF- CsAl(SO4)2·12H2O

2013 ◽  
Vol 16 (2) ◽  
pp. 079-082
Author(s):  
X.D. Wang ◽  
H.Y. Shen ◽  
L.B. Yang ◽  
W.S. Ning ◽  
B. Guo ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Proton Conductivity ◽  
Polymer Composite ◽  
Composite Membrane ◽  
Wide Temperature Range ◽  
Sharp Increase ◽  
The Novel ◽  
Crystal Water ◽  
Temperature Range ◽  
Attractive Candidate

A novel polymer composite membrane PVDF-CsAl(SO4)2·12H2O with high conductivity within a wide temperature range (30-140 °C) is synthesized by composing PVDF and conductors CsAl(SO4)2·12H2O. A sharp increase of the conductivity has been observed at around 90 °C, which was due to the release of the crystal water in the CsAl(SO4)2·12H2O. The highest conductivity of 0.45×103 S·cm-1 was obtained at 140°C , The novel polymer composite membrane PVDF-CsAl(SO4)2·12H2O described here can be an attractive candidate as electrolyte in the low and medium fuel cell.

scholarly journals Investigating the Effect of Positional Isomerism on the Assembly of Zirconium Phosphonates Based on Tritopic Linkers

2019 ◽  
Author(s):  
Marco Taddei ◽  
Stephen J. I. Shearan ◽  
Anna Donnadio ◽  
Mario Casciola ◽  
Riccardo Vivani ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Proton Conductor ◽  
Oh Groups ◽  
Porous Architecture ◽  
Zirconium Phosphonates ◽  
Zirconium Phosphonate ◽  
Network Of Hydrogen Bonds ◽  
Positional Isomerism

We report on the use of a novel tritopic phosphonic linker, 2,4,6-tris[3-(phosphonomethyl)phenyl]-1,3,5-triazine, for the synthesis of a layered zirconium phosphonate, named UPG-2. Comparison with the structure of the permanently porous UPG-1, based on the related linker 2,4,6-tris[4-(phosphonomethyl)phenyl]-1,3,5-triazine, reveals that positional isomerism disrupts the porous architecture in UPG-2 by preventing the formation of infinitely extended chains connected through Zr-O-P-O-Zr bonds. The presence of free, acidic P-OH groups and an extended network of hydrogen bonds makes UPG-2 a good proton conductor, reaching values as high as 5.7x10<sup>-4</sup> S cm<sup>-1</sup>.<br>

scholarly journals High Proton Conductive Sulfonated Graph Copolyimide Membranes Containing Chemically Stable Naphthalene Moieties

2017 ◽  
Vol 12 (1) ◽  
Author(s):  
K. Yamazaki ◽  
M. Tanaka ◽  
H. Kawakami
Keyword(s):  
Proton Conductivity ◽  
Oxygen Permeability ◽  
Main Chain ◽  
Gas Permeability ◽  
The Novel ◽  
High Proton Conductivity ◽  
Gas Barrier ◽  
Polymer Main Chain ◽  
High Proton ◽  
Potential Applications

Syntheses, proton conductivity, gas permeability properties, and membrane stabilities of novel sulfonated graft copolyimides were investigated. The sulfonated graft copolyimide membrane showed significantly high proton conductivity (0.96 S/cm at 90°C and 98%RH, more than 6 times that of Nafion), suggesting that the protons in the sulfonated graft copolyimide membranes were efficiently transported. The oxidative stability of the novel sulfonated graft copolyimide was higher than that of the conventional graft copolyimide because of their polymer structures containing chemically stable naphthalene moieties and non–sulfonated polymer main–chain. Furthermore, the oxygen permeability of the membrane was approximately one–fourth the value of Nafion and had a very excellent gas barrier property. We demonstrated that the graft copolymer membrane could realize high proton conductivity and low gas permeability to have potential applications for use in fuel cells.

scholarly journals Investigating the Effect of Positional Isomerism on the Assembly of Zirconium Phosphonates Based on Tritopic Linkers

2019 ◽  
Author(s):  
Marco Taddei ◽  
Stephen J. I. Shearan ◽  
Anna Donnadio ◽  
Mario Casciola ◽  
Riccardo Vivani ◽  
...  
Keyword(s):  
Hydrogen Bonds ◽  
Proton Conductor ◽  
Oh Groups ◽  
Porous Architecture ◽  
Zirconium Phosphonates ◽  
Zirconium Phosphonate ◽  
Network Of Hydrogen Bonds ◽  
Positional Isomerism

We report on the use of a novel tritopic phosphonic linker, 2,4,6-tris[3-(phosphonomethyl)phenyl]-1,3,5-triazine, for the synthesis of a layered zirconium phosphonate, named UPG-2. Comparison with the structure of the permanently porous UPG-1, based on the related linker 2,4,6-tris[4-(phosphonomethyl)phenyl]-1,3,5-triazine, reveals that positional isomerism disrupts the porous architecture in UPG-2 by preventing the formation of infinitely extended chains connected through Zr-O-P-O-Zr bonds. The presence of free, acidic P-OH groups and an extended network of hydrogen bonds makes UPG-2 a good proton conductor, reaching values as high as 5.7x10<sup>-4</sup> S cm<sup>-1</sup>.<br>

ChemInform Abstract: Synthesis and Structure Determination of the Novel Aluminophosphate TL-1: A New Layered Compound with Corner-Sharing AlX6 Chains.

ChemInform ◽  
2016 ◽  
Vol 47 (46) ◽  
Author(s):  
Linda Pastero ◽  
Rossella Arletti ◽  
Fernando Camara ◽  
Lara Gigli ◽  
Monica Cagnoni
Keyword(s):  
Structure Determination ◽  
Layered Compound ◽  
The Novel

Magnetic and Mössbauer Study of the Novel FeIn2S2Se2 Layered Compound

2002 ◽  
Vol 164 (2) ◽  
pp. 326-331 ◽  
Author(s):  
G.F. Goya ◽  
A. Memo ◽  
H. Haeuseler
Keyword(s):  
Layered Compound ◽  
The Novel ◽  
Mössbauer Study
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