This research article is focused on the recognition interaction of a new host naphtho-21-crown-7 and four sec-ondary dialkylammonium salts.In acetone,they can form 1∶1 host-guest complexes which belong to slow-exchan...This research article is focused on the recognition interaction of a new host naphtho-21-crown-7 and four sec-ondary dialkylammonium salts.In acetone,they can form 1∶1 host-guest complexes which belong to slow-exchange systems.We also found the differences of binding affinity and binding selectivity between the host and its complementary guest moieties,which could be ascribed to the aromaticπ-πstacking effect and the acidity increase of N-methylene and ammonium hydrogens due to the increasing electron withdrawing ability from butyl to methoxyphenyl to phenyl to p-cyanophenyl substituents in the recognition motif.展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.21172166 and 21203135)China Postdoctoral Science Foundation(No.2013M541456)+1 种基金Natural Science Foundation of Zhejiang Province(No.LY14B020012)University Students'Science and Technology Innovation Program of Zhejiang Province(No.2013R428016).
文摘This research article is focused on the recognition interaction of a new host naphtho-21-crown-7 and four sec-ondary dialkylammonium salts.In acetone,they can form 1∶1 host-guest complexes which belong to slow-exchange systems.We also found the differences of binding affinity and binding selectivity between the host and its complementary guest moieties,which could be ascribed to the aromaticπ-πstacking effect and the acidity increase of N-methylene and ammonium hydrogens due to the increasing electron withdrawing ability from butyl to methoxyphenyl to phenyl to p-cyanophenyl substituents in the recognition motif.
