4-Tritylbenzoic acid. A molecular scaffold for wheel-and-axle host–guest inclusion compounds with a supramolecular axis
Jetti, RKR; Xue, F; Mak, TCW; Nangia, A
| HERO ID | 994296 |
|---|---|
| In Press | No |
| Year | 2000 |
| Title | 4-Tritylbenzoic acid. A molecular scaffold for wheel-and-axle host–guest inclusion compounds with a supramolecular axis |
| Authors | Jetti, RKR; Xue, F; Mak, TCW; Nangia, A |
| Journal | Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry |
| Volume | 6 |
| Issue | 6 |
| Page Numbers | 1223-1232 |
| Abstract | 4-Tritylbenzoic acid crystallises via the carboxy dimer supramolecular synthon to produce a wheel-and-axle host lattice that includes different aromatic solvents in its microporous framework. The clathrate structures were characterised by single crystal X-ray diffraction. Solvents like xylenes, chlorobenzene and anisole are included in a channel of cross-sectional area 42 Angstrom(2) with 2:1 host-guest stoichiometry while mesitylene occupies a channel of 71 Angstrom(2) as a 1:1 clathrate. The host architecture is robust and yet adaptive. The carboxy dimer synthon together with the phenyl-phenyl interactions (edge-to-face, ef and offset face-to-face, off) produce recurring, zigzag tapes of wheel-and-axle supermolecules. A plethora of aromatic ef and off motifs in the intra- and inter-tape regions modulate the cavity area to accommodate solvents of different size/shape. The ability to tune the pore volume and still retain the target wheel-and-axle topology is a notable feature in this family of isomorphous structures. The unsolvated acid adopts a different crystal packing with the triphenylmethyl groups filling the voids in the structure. |
| Doi | 10.1039/A909827E |
| Wosid | WOS:000087237200020 |
| Url | http://xlink.rsc.org/?DOI=a909827e |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Is Qa | No |