共 2 条
- [1] New N-heterocyclic carbene silver(I) and mercury(II) 2-D supramolecular layers by the π-π stacking interactions[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 2007, 692 (17) : 3655 - 3663Liu, Qing-XiangYin, Li-NaFeng, Jin-Cheng
Unravelling the Roles of Solvophobic Effects and π⋅⋅⋅π Stacking Interactions in the Formation of [2]Catenanes Featuring Di-(N-Heterocyclic Carbene) Building Blocks
被引：8
|作者：
Zhang, Ya-Wen
[1
]
Lu, Ye
[2
,3
]
Sun, Li-Ying
[1
]
Dutschke, Patrick D.
[2
]
Gan, Ming-Ming
[1
]
Zhang, Le
[1
]
Hepp, Alexander
[2
]
Han, Ying-Feng
[1
]
Hahn, F. Ekkehardt
[2
]
机构：
[1] Northwest Univ, Coll Chem & Mat Sci, Xian Key Lab Funct Supramol Struct & Mat, Xian 710127, Peoples R China
[2] Westfal Wilhelms Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 30, D-48149 Munster, Germany
[3] Shanghai Normal Univ, Coll Chem & Mat Sci, 100 Guilin Rd, Shanghai 200234, Peoples R China
基金：
中国国家自然科学基金;
关键词：
Metallamacrocycles;
N-Heterocyclic Carbenes;
Self-Assembly;
Supramolecular Chemistry;
2]Catenanes;
BORROMEAN RINGS;
SELECTIVE SYNTHESIS;
COMPLEXES;
DICARBENE;
STRATEGY;
ARCHITECTURES;
CONSTRUCTION;
CATENANES;
TOPOLOGY;
CAGES;
D O I：
10.1002/anie.202312323
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A series of [2]catenanes has been prepared from di-NHC building blocks by utilizing solvophobic effects and/or pi & sdot;& sdot;& sdot;pi stacking interactions. The dinickel naphthobiscarbene complex syn-[1] and the kinked biphenyl-bridged bipyridyl ligand L2 yield the [2]catenane [2-IL](OTf)4 by self-assembly. Solvophobic effects are pivotal for the formation of the interlocked species. Substitution of the biphenyl-linker in L2 for a pyromellitic diimide group gave ligand L3, which yielded in combination with syn-[1] the [2]catenane [3-IL](OTf)4. This assembly exhibits enhanced stability in diluted solution, aided by additional pi & sdot;& sdot;& sdot;pi stacking interactions. The pi & sdot;& sdot;& sdot;pi stacking was augmented by the introduction of a pyrene bridge between two NHC donors in ligand L4. Di-NHC precursor H2-L4(PF6)2 reacts with Ag2O to give the [Ag2L42]2 [2]catenane [4-IL](PF6)4, which shows strong pi & sdot;& sdot;& sdot;pi stacking interactions between the pyrene groups. This assembly was readily converted into the [Au2L42]2 gold species [5-IL](PF6)4, which exhibits exceptional stability based on the strong pi & sdot;& sdot;& sdot;pi stacking interactions and the enhanced stability of the Au-CNHC bonds. Different effects have been shown to control the formation of [2]catenanes with different bridges between pyridine donors. The formation of [2-IL](OTf)4 is aided by solvophobic effects and [3-IL](OTf)4 is stabilized by solvophobic effects and pi & sdot;& sdot;& sdot;pi stacking. The pi & sdot;& sdot;& sdot;pi stacking between the pyrene groups is essential for the formation of [4-IL](PF6)4 and [5-IL](PF6)4, where the enhanced stability of [5-IL](PF6)4 is based on the more stable Au-CNHC bonds.+image
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页数：9
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