Aqueous self-assembly and cation selectivity of cobaltabisdicarbollide dianionic dumbbells.
The anion [3,3'-Co(C2B9H11)2](-) ([COSAN](-)) produces aggregates in water. These aggregates are interpreted to be the result of C-H⋅⋅⋅H-B interactions. It is possible to generate aggregates even after the incorporation of additional functional groups into the [COSAN](-) units. The approach is to join two [COSAN](-) anions by a linker that can adapt itself to act as a crown ether. The linker has been chosen to have six oxygen atoms, which is the ideal number for K(+) selectivity in crown ethers. The linker binds the alkaline metal ions with different affinities; thus showing a distinct degree of selectivity. The highest affinity is shown towards K(+) from a mixture containing Li(+), Na(+), …
Towards Multifunctional Materials Incorporating Elastomers and Reversible Redox-Active Fragments
This paper presents a novel and unique feature of metallacarboranes, consisting of the linkage of this redox electro-active site to a stretchable polymer. This is based on polyTHF, a known and applied material. This hybrid material has the two ends functionalized: one with the aforemen- tioned redox molecule and the other with a terminal OH group, both linked by a molecular spring. Moreover, the redox electro-active molecules can be synthesized with either cobalt (cobaltabisdicarbollide) or with iron (ferrabisdi- carbollide), species whose respective E1/2 value differs by almost 1 V. The polymerization mechanism, based on an in- termediate molecular crystal structure, is explained through a…
CCDC 910884: Experimental Crystal Structure Determination
Related Article: Màrius Tarrés, Clara Viñas, Ana M. Cioran, Mikko M. Hänninen, Reijo Sillanpää, Francesc Teixidor|2014|Chem.-Eur.J.|20|15808|doi:10.1002/chem.201403424
CCDC 910883: Experimental Crystal Structure Determination
Related Article: Màrius Tarrés, Clara Viñas, Ana M. Cioran, Mikko M. Hänninen, Reijo Sillanpää, Francesc Teixidor|2014|Chem.-Eur.J.|20|15808|doi:10.1002/chem.201403424
CCDC 970547: Experimental Crystal Structure Determination
Related Article: Màrius Tarrés, Clara Viñas, Patricia González-Cardoso, Mikko M. Hänninen, Reijo Sillanpää, Vladimír Dordovič, Mariusz Uchman, Francesc Teixidor, Pavel Matejíček|2014|Chem.-Eur.J.|20|6786|doi:10.1002/chem.201402193