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15 results on '"Chen, Tianyang"'

2. Pyrogallate‐Based Metal‐Organic Framework with a Two‐Dimensional Secondary Building Unit

Author

Massachusetts Institute of Technology. Department of Chemistry, Kampouri, Stavroula, Zhang, Mingxuan, Chen, Tianyang, Oppenheim, Julius J, Brown, Alexandra, Payne, Michael, Andrews, Justin L, Sun, Junliang, Dincă, Mircea, Massachusetts Institute of Technology. Department of Chemistry, Kampouri, Stavroula, Zhang, Mingxuan, Chen, Tianyang, Oppenheim, Julius J, Brown, Alexandra, Payne, Michael, Andrews, Justin L, Sun, Junliang, and Dincă, Mircea

Abstract

We report a metal-organic framework (MOF) with a rare two-dimensional (2D) secondary building unit (SBU). The SBU comprises mixed-valent Fe2+ and Fe3+ metal ions bridged by oxygen atoms pertaining to the polytopic ligand 3,3',4,4',5,5'-hexahydroxybiphenyl, which also define the iron-oxide 2D layers. Overall, the anionic framework exhibits rare topology and evidences strong electronic communication between the mixed-valence iron sites. These results highlight the importance of dimensionality control of MOF SBUs for discovering new topologies in reticular chemistry, and especially for improving electronic communication within the MOF skeleton.

Published
2023

9. Dual‐ion intercalation and high volumetric capacitance in a two‐dimensional non‐porous coordination polymer

Author

Massachusetts Institute of Technology. Department of Chemistry, Banda, Harish, Dou, Jin-Hu, Chen, Tianyang, Zhang, Yugang, Dincă, Mircea, Massachusetts Institute of Technology. Department of Chemistry, Banda, Harish, Dou, Jin-Hu, Chen, Tianyang, Zhang, Yugang, and Dincă, Mircea

Abstract

Intercalation is a promising ion-sorption mechanism for enhancing the energy density of electrochemical capacitors (ECs) because it offers enhanced access to the electrochemical surface area. It requires a rapid transport of ions in and out of a host material, and it must occur without phase transformations. Materials that fulfil these requirements are rare; those that do intercalate almost exclusively cations. Herein, we show that Ni3 (benzenehexathiol) (Ni3 BHT), a non-porous two-dimensional (2D) layered coordination polymer (CP), intercalates both cations and anions with a variety of charges. Whereas cation intercalation is pseudocapacitive, anions intercalate in a purely capacitive fashion. The excellent EC performance of Ni3 BHT provides a general basis for investigating similar dual-ion intercalation mechanisms in the large family of non-porous 2D CPs.

Published
2022

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