| Autor: |
Barker NM; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States., Taylor SD; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States., Ferguson E; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States., Krause JA; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States., Oliver AG; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States., Connick WB; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States., Zhang P; Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45220, United States. |
| Abstrakt: |
Solvent plays a vital role in the recrystallization process and resulting crystallinity of materials. This role is of such importance that it can control the stability and utility of materials. In this work, the inclusion of a solvent in the crystalline lattice, specifically water, drastically affects the overall stability of two platinum polymorphs. [Pt(tpy)Cl]BF 4 (tpy = 2,2';6'2″-terpyridine) crystallizes in three forms, red ( 1R ) and blue ( 1B ) polymorphs and a yellow nonsolvated form ( 2 ). 1R is the more stable of the two polymorphs, whereas 1B loses crystallinity upon dehydration at ambient conditions resulting in the formation of 2 . Close examination of the solid-state extended structures of the two polymorphs reveals that 1R has a lattice arrangement that is more conducive to stronger intermolecular interactions compared to 1B , thereby promoting greater stability. In addition, these two polymorphs exhibit unique vapochromic responses when exposed to various solvents. |
