Stacking Interactions Drive Selective Self-Assembly and Self-Sorting of Pyrene-Based MII4L6 Architectures

被引:58
作者
Ronson, Tanya K. [1 ]
Roberts, Derrick A. [1 ]
Black, Samuel P. [1 ]
Nitschke, Jonathan R. [1 ]
机构
[1] Univ Cambridge, Dept Chem, Lensfield Rd, Cambridge CB2 1EW, England
基金
英国工程与自然科学研究理事会;
关键词
M4L6 TETRAHEDRAL HOST; COORDINATION CAGES; DONOR-ACCEPTOR; GUEST EXCHANGE; MOLECULAR RECOGNITION; RATIONAL DESIGN; LIGANDS; CONSTRUCTION; BINDING; COMPLEXES;
D O I
10.1021/jacs.5b09920
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Subcomponent self-assembly of two isomeric bis(3-aminophenyl)pyrenes, 2-formylpyridine and the metal ions Fe-II, Co-II, and Zn-II led to the formation of two previously unidentified structure types: a C-2-symmetric (M4L6)-L-II assembly with meridionally coordinated metal centers, and a C-3-symmetric self-included (M4L6)-L-II assembly with facially coordinated metal centers. In both structures the meta linkages within the ligands facilitate pi-stacking between the pyrene panels of the ligands. A C-2-symmetric (M2L2)-L-II box was also obtained, which was observed to selectively bind electron-deficient aromatic guests between two parallel pyrene subunits. Similar donoracceptor interactions drove the selective self-assembly of a singular (M4L4L)-L-II'(2) architecture incorporating both a pyrene-containing diamine and an electron-deficient NDI-based diamine. This heteroleptic architecture was shown to be thermodynamically favored over the corresponding homoleptic (M4L6)-L-II and (M4L)-L-II'(6) complexes, which were nonetheless stable in each others absence. By contrast, an isomeric pyrene-based diamine was observed to undergo narcissistic self-sorting in the presence of the NDI-based diamine.
引用
收藏
页码:14502 / 14512
页数:11
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