Anion- and Spacer-Directed Host-Guest Complexes of Bipyridine with Pyrogallol[4]arene

作者：Patil Rahul S; Kumari Harshita; Barnes Charles L; Atwood Jerry L^*

来源：Chemistry - A European Journal, 2015, 21(29): 10431-10435.

DOI：10.1002/chem.201406574

• calixarenes
• hydrogen bonding
• nanocapsules
• supramolecular chemistry

New oval-shaped capsular and bilayer-type hydrogen-bonded arrangements of C-propyl-ol-pyrogallol[4]arene (PgC3-OH) with bipyridine-type spacer complexes are reported here. These complexes are engineered by virtue of derivatization of C-alkyl tails of pyrogallol[4]arene and the use of divergent spacer ligands. Complexes of PgC3-OH, PgC3-OH with bpy (4,4-bipyridine) and PgC3-OH with bpa (1,2-bis(4-pyridyl)acetylene) have bilayer type arrangements; however, the use of hydrogen chloride causes protonation of bpy molecule, which is then entrapped flat within an offset oval-shaped dimeric hydrogen-bonded PgC3-OH nanocapsule. The presence of chloride anion in the crystal lattice controls the geometry of the resultant nanoassembly.

• 出版日期2015-7-13