Electrospray ionization mass spectrometric study of CuI and CuII bipyridine complexes employed in atom transfer radical polymerization
✍ Scribed by Tomislav Pintauer; Christina B. Jasieczek; Krzysztof Matyjaszewski
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 102 KB
- Volume
- 35
- Category
- Article
- ISSN
- 1076-5174
No coin nor oath required. For personal study only.
✦ Synopsis
We report an electrospray ionization mass spectrometric study of Cu I and Cu II bipyridine complexes employed in atom transfer radical polymerization. Mass spectra of Cu I Br complexed with 2 equiv. of 4,4 -di(5-nonyl)-2,2bipyridine (dNbpy) in toluene, methyl acrylate or styrene showed the presence of [Cu I (dNbpy) 2 ] Y cation and [Cu I Br 2 ] -anion. For the Cu II Br 2 /2dNbpy system, [Cu II (dNbpy) 2 Br] Y , [Cu II (dNbpy)Br] Y , [Cu I Br 2 ] -, [Cu II Br 3 ] - and [Cu II (dNbpy)Br 3 ] -species were observed. In addition, for mixed Cu I Br/2dNbpy and Cu II Br 2 /2dNbpy systems, the negative ion mode showed only the presence of [Cu I Br 2 ] -anions, which are potentially formed through halogen exchange between [Cu II Br 3 ] -and [Cu I (dNbpy) 2 ] Y .