AI Article Synopsis
- The study examines the proton conductivity of two different coordination networks, [Mg(HO)(HL)]·HO and [Pb(HL)]·HO, using AC impedance spectroscopy.
- Both networks use the same phosphonato-sulfonate linker but have different crystal structures, which significantly affects their proton conductivity.
- The Mg-based network benefits from an extended hydrogen bonding network that enables efficient proton hopping, resulting in moderate conductivity, while the Pb-based network lacks this feature, leading to much lower conductivity.
Article Abstract
The proton conductivity of two coordination networks, [Mg(HO)(HL)]·HO and [Pb(HL)]·HO (HL = (HOPCH)-NCH-CH-SOH), is investigated by AC impedance spectroscopy. Both materials contain the same phosphonato-sulfonate linker molecule, but have clearly different crystal structures, which has a strong effect on proton conductivity. In the Mg-based coordination network, dangling sulfonate groups are part of an extended hydrogen bonding network, facilitating a "proton hopping" with low activation energy; the material shows a moderate proton conductivity. In the Pb-based metal-organic framework, in contrast, no extended hydrogen bonding occurs, as the sulfonate groups coordinate to Pb, without forming hydrogen bonds; the proton conductivity is much lower in this material.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086504 | PMC |
| http://dx.doi.org/10.3762/bjnano.13.36 | DOI Listing |
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