Abstract
A novel polar solvent-soluble tetra-functionalised cyano-footed calixarene forms a dimeric capsule, sealed via a hydrogen-bonding network between the two macrocycles, a single water molecule and a chloride anion, resulting in the encapsulation of a pyridinium guest, as shown in both solution and the solid state.
Acknowledgements
The authors thank Mr N. Fujii (Jeol UK) for assistance with diffusion NMR experiments, Nottingham Trent University and National Eye Research Centre for funding.
Notes
1. Crystallographic data: C149H208ClN9O25, Mr = 2560.74, colourless block, 0.40 × 0.35 × 0.30 mm3, monoclinic, space group C2/c (No. 15), a = 34.0663(17), b = 12.5680(6), c = 34.7846(16) Å, β = 107.054(2)°, V = 14238.0(12) Å3, Z = 4, Dc = 1.192 g/cm3, Bruker X8 Apex II CCD Diffractometer, MoKα radiation, λ = 0.71073 Å, T = 100(2) K, 2θmax = 46.6°, 37,394 reflections collected, 10,185 unique (Rint = 0.0451). Final GooF = 1.915, R1 = 0.0982, wR2 = 0.2704, R indices based on 6408 reflections with I>2σ(I) (refinement on F2). CCDC reference number 701056 for crystallographic data in CIF or other electronic format.