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Enhancement of anion recognition exhibited by a zinc-imidazole-based ion-pair receptor composed of C-H hydrogen- and halogen-bond donor groups.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sabater, Paula Zapata, Fabiola López, Bernardo Castellano Fernández, Israel Caballero, Antonio Molina, Pedro |
| Copyright Year | 2018 |
| Abstract | A 2-haloimidazole-tetraphenylethylene ion-pair receptor 1 is shown to recognise only HSO4- anions in the presence of a cobound Zn2+ cation guest species, which induced a remarkable increase with concomitant blue shift of the emission band of the complex [1·2Zn]4+ whereas no affinity of the free receptor 1 by the anions is observed. In addition, the downfield shifts observed by 1H NMR of the Ha, Hb and Hc protons of the complex [1·2Zn]4+ upon the addition of HSO4- anions indicate their participation in the recognition event. According to DFT studies, upon chelating a Zn2+ cation with two imidazole nitrogen atoms, receptor 1 adopts a conformation ideally fitted to recognise HSO4- through a combination of C(sp2)-HO and C(sp3)-HO hydrogen bondings, C+(sp2)-BrO halogen bonding and C(sp2)O tetrel bonding. |
| Starting Page | 15941 |
| Ending Page | 15947 |
| Page Count | 7 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c8dt03736a |
| PubMed reference number | 30376013 |
| Journal | Medline |
| Volume Number | 47 |
| Issue Number | 44 |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c8/dt/c8dt03736a/c8dt03736a1.pdf |
| Journal | Dalton transactions |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
