The β-cyclodextrin dimer (1, host) bridged two 1, 2-diaminoethane was synthesized by using a regiospecific capping reagent (m-benzenedisulfonyl chloride). The research we have done indicated that the dimer and Cu^2^+ ion formed a stable coordination compound (2, host). The evidence that p-, m- or o-chlorophenol and p-, m- or o- chlorophenolate (guests) was included by β-cyclodextrin, 1 and 2 respectively, comes from ^1H NMR spectroscopic studies performed on the host-guest inclusion compounds in D2O at 22℃. Comparison of the formation constants of inclusion compounds revealed that there is a multiple recognition mechanism in existence between the host molecule (2) and the organic anion guest.

Key words: DIMER, CYCLODEXTRIN, COPPER COMPLEX, ETHANEDIAMINE