Crystallization of Anhydrous Proton from Acidic Aqueous Solution with Diamide Building Block
Crystallization of Anhydrous Proton from Acidic Aqueous Solution with Diamide Building Block
Kazama, H.; Tsushima, S.; Takao, K.
Although H+ has the largest hydration enthalpy amongst all the monovalent cations, we have demonstrated that anhydrous H+ can be crystallized together with selected diamide building block (L) and NO3− even in acidic aqueous solutions, which were confirmed in 3 different structures. One of these anhydrous H+ adducts constitutes of H+-involved hydrogen bond polymers [L···H+]n, which are coupled with another H+ adduct [O2NO−···H+···O−NO2]− as a counteranion unit. The anhydrous H+ can also be trapped between L and NO3− to form heteroleptic O···H+···O hydrogen bonds observed in two different crystal structures. DFT calculations revealed that there is no energetic barrier in these O···H+···O hydrogen bonds, having so-called a single-well hydrogen bond.
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Crystal Growth & Design 19(2019)11, 6048-6052
DOI: 10.1021/acs.cgd.9b01214
Cited 6 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-29756