1187876-36-3Relevant academic research and scientific papers
Synthesis, structure and inclusion properties of distal-bis{[(5'-methyl-2, 2,-bipyridyl)-5-yl]methoxy}tetrathiacalix[4]arene with 1,2-alternate conformation
Shimizu, Tomoe,Rahman, Shofiur,Xi, Zeng,Yamato, Takehiko
, p. 104 - 108 (2009)
distal-Tetrathiacalix[4]arene having [(5'-methyl-2,2'-bipyridyl)-5-yl] methoxy group with 1,3-alternate conformation was prepared, which shows strong Ag+ affinity and the high Ag+ selectivity. The conformational change of 2,2'-bipyri
Heteroditopic thiacalix[4]arene receptor having ester and bipyridyl moieties for ions binding with positive/negative allosteric effect
Ni, Xin-Long,Cong, Hang,Yoshizawa, Akina,Rahman, Shofuir,Tomiyasu, Hirotsugu,Rayhan, Ummey,Zeng, Xi,Yamato, Takehiko
, p. 110 - 115 (2013)
A novel ditopic receptor possessing two complexation sites and bearing 1,3-alternate conformation based thiacalix[4]arene was prepared. The binding behaviors with Na+, K+ and Ag+ ions have been examined by 1H NMR titration experiment in (CDCl3/CD 3CN; 10:1, v/v) solution. The job plots proves 1:1 complexation of 1,3-alternate-4 with Na+, K+ and Ag+ ions. Although the formation of heterogeneous dinuclear complexes was not clearly observed, the exclusive formation of mononuclear complexes of 1,3-alternate-4 with metal cations is of particular interest with positive/negative allosteric effect in thiacalix[4]arene family. These findings further demonstrate that preorganization, suitable conformational changes and affinity have a pronounced effect on the complexation process between the two different arms placed at the two edges of the thiacalix[4]arene cavity.
