Kinetically-Locked Metallomacrocycle for Host-Guest Chemistry with Bulky Anions

被引:4
作者
Kawano, Shin-ichiro [1 ]
Harada, Takahiro [1 ]
Sasaki, Ako [1 ]
Tanaka, Kentaro [1 ]
机构
[1] Nagoya Univ, Grad Sch Sci, Dept Chem, Furo Cho,Chikusa Ku, Nagoya 4648602, Japan
关键词
Anion recognition; Coordination chemistry; Host-Guest systems; Macrocycles; METALLACYCLES; CONSTRUCTION; DISCRETE; COMPLEX; SIZE;
D O I
10.1002/ejic.202200592
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
As a robust and large molecular receptor, a kinetically-locked trinuclear Co(III) macrocycle was synthesized with bis(beta-diketone) ligands having large pi-panels of 9,10-diphenylanthracene moieties via a combination of Co(II)-assisted self-assembly and subsequent oxidation of the metal centers. The X-ray structure revealed that the macrocycle had a discrete nanocavity of more than 300 angstrom(3), which was surrounded by three anthracenyl panels in the middle. As the macrocycle has three cationic centres on each metal ion and a large cavity, it acts as a guest receptor for sodium tetraphenylborate. The binding constant was estimated to be 4.0x10(-2) M-1 from H-1 NMR titration experiments, whereas no interaction was observed between the macrocycle and potassium 1-adamantanecarboxylate.
引用
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页数:5
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