Anion Binding by Bambus[6]uril Probed in the Gas Phase and in Solution
| Authors | |
|---|---|
| Year of publication | 2011 |
| Type | Article in Periodical |
| Magazine / Source | J. Phys. Chem. A |
| MU Faculty or unit | |
| Citation | |
| Web | http://pubs.acs.org/doi/abs/10.1021/jp205218k?prevSearch=%255BContrib%253A%2Bsvec%255D&searchHistoryKey= |
| Doi | http://dx.doi.org/10.1021/jp205218k |
| Field | Organic chemistry |
| Keywords | Bambus[6]uril; halide ions; anion binding; condensed phase |
| Description | Electrospray ionization mass spectrometry (ESI-MS) is used to probe the binding of small anions to the macrocycle of bambus[6]uril. For the halide ions, the experimental patterns suggest F– < Cl– < Br– < I–, which is consistent with the order of anion binding found in the condensed phase. Parallel equilibrium studies in the condensed phase establish the association constants of halide anions and bambus[6]uril in mixed solvents. A detailed analysis of the mass spectrometric data is used to shed light on the correlations between the binding constants in the condensed phase and the ion abundances observed using ESI-MS. From the analysis it becomes apparent that ESI-MS can indeed represent the situation in solution to some extent, but the sampling in the gas-phase experiment is not 1:1 compared to that in solution. |
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