Unexpected Isolation of a Pentameric Metallomacrocycle from the FeII-Mediated Complexation of 120° Juxtaposed 2,2′:6′,2"-Terpyridine Ligands

被引:53
作者
Chan, Yi-Tsu [1 ,2 ]
Moorefield, Charles N. [3 ]
Soler, Monica [1 ,2 ]
Newkome, George R. [1 ,2 ,3 ]
机构
[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA
[2] Univ Akron, Dept Chem, Akron, OH 44325 USA
[3] Univ Akron, Maurice Morton Inst Polymer Sci, Akron, OH 44325 USA
基金
美国国家科学基金会;
关键词
carbohydrates; iron; macrocycles; self-assembly; tridentate ligands; MOLECULAR SQUARE; COORDINATION; IRON(II); CONSTRUCTION; MACROCYCLES; POLYMERS; STEPWISE; TRIANGLE; FE(II);
D O I
10.1002/chem.200902988
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The isolation and characterization of a unique pentameric macrocycle, along with its anticipated hexameric homologue, generated from an Fe-mediated complexation of functionalized bis(terpyridine) ligands with a 120° angle relative to the coordination sites has been reported. Self-assembly of specially designed building blocks has been widely employed in the construction of rigid supramolecular structures. UV/Vis spectra of pentamer,hexamer, and model complex in a dilute MeOH exhibited the expected absorption transition. The self-assembled nanofibers of both macrocycles were generated by slowly diffusing the nonpolar solvent hexane into a homogeneous solution of macrocycles. The minor product, pentamer, which is believed to result from the initially formed kinetic product, suggests that there are likely exceptions to the coordination driven self-assembly of bis(terpyridine) ligands.
引用
收藏
页码:1768 / 1771
页数:4
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