Supramolecular Control of the Template-Induced Selective Photodimerization of 4-Methyl-7-O-hexylcoumarin
作者:William G. Skene、Emilie Couzigné、Jean-Marie Lehn
DOI:10.1002/chem.200305268
日期:2003.11.21
are capable of binding substrates with complementary donor and acceptor sites to form a supramolecular complex through hydrogen bonding. Receptor 3 was designed to accept two guest molecules, which are held in close proximity within the supramolecular species. The substrate molecule, 4-methyl-7-O-hexylcoumarin (1 c), forms a 2:1 complex with a binding constant of 150 m(-1) for the second substrate
设计并合成了包含两个相同的氢键识别亚基的对称的对位分子受体(3)。这些亚基能够结合具有互补供体和受体位点的底物以通过氢键形成超分子复合物。受体3被设计为接受两个客体分子,它们紧密地保持在超分子物种内。底物分子4-甲基-7-O-己基香豆素(1 c)与第二种底物形成2:1配合物,其结合常数为150 m(-1),首先通过1:1配合物与亲和常数510 m(-1)。当1 c的两个分子与模板结合时,其取向会导致在照射时选择性形成反式[2 + 2]光合产物2 cB。