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- Title
Halogen Contacts-Induced Unusual Coloring in Bi<sup>III</sup> Bromide Complex: Anion-to-Cation Charge Transfer via Br⋅⋅⋅Br Interactions.
- Authors
Adonin, Sergey A.; Gorokh, Igor D.; Novikov, Alexander S.; Abramov, Pavel A.; Sokolov, Maxim N.; Fedin, Vladimir P.
- Abstract
A yellow bromobismuthate {(2-BrPy)2H}[BiBr4] ( 1, 2-BrPy=2-bromopyridinium) transforms into the unusually deeply colored cherry-red (2-BrPyH)2[BiBr5] ( 2). A combination of structural studies and theoretical calculations confirms that the appearance of short non-covalent Br⋅⋅⋅Br interactions (≈3.3 Å) in 2 is responsible for the anion-to-cation charge transfer (LP(Brligand)→σ*(Br-C)), yielding dramatic changes in optical behavior. This effect opens the way towards novel halogen bonding-templated halometalate-based hybrid materials with enhanced optical properties.
- Subjects
BROMIDES; HALOGENS; MOLECULAR structure; MOLECULAR interactions; CHEMICAL bonds; OPTICAL properties; CHARGE transfer
- Publication
Chemistry - A European Journal, 2017, Vol 23, Issue 62, p15612
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201703747