%0 Journal Article %T New Applications of Crown Ethers. X. 13C NMR Relaxation Times Study of Cation-Binding Behavior of Monoazacrown Ethers and Bis(monoazacrown ether)s %A He, Gong-Xin %A Imato, Toshihiko %A Ishibashi, Nobuhiko %A Shinkai, Seiji %A Matsuda, Tsutomu %J Bulletin of the Chemical Society of Japan %V 63 %N 2 %P 401-406 %@ 0009-2673 %D 2006-06-05 %I Oxford University Press %~ DeepDyve