Binding of Linear Anions and Formation of Anion Encapsulated Dimeric Capsular Assembly by Cis-5,15-bis(3,5-trifluoromethylphenyl)calix[4]pyrrole

초록

Cis-5,15-bis(3,5-trifluoromethylphenyl)calix[4]pyrrole (1) forms stable 1/1 complexes with linear anions such as N-3(-), SCN- and NCO- with the highest affinity for NCO- anion in acetonitrile solution. Crystallization of receptor 1 with TBASCN and (TMA)(2)SO4 resulted in the formation of dimeric capsular assembly, {(TMA)(2)[1(2) & sdot; (SCN)(2)]}, in which two thiocyanate anions are encapsulated. On the other hand, 1 & sdot; OCN(TMA) and 1 & sdot; N-3(TMA) complexes form one dimensional columnar structure in the solid state.

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