期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 22, 页码 5591-5595出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201310536
关键词
[2+2] cycloaddition; metal-organic frameworks; nitro compounds; polyrotaxanes; zinc
资金
- NRF, South Korea [BRL-2012R1A4A1027750]
- Ministry of Education, Singapore through NUS FRC [R-143-000-562-112]
Distortional isomers, or bond-stretch isomers, differ only in the length of one or more bonds, which is due to crystallographic disorder in most cases. The term distortional isomerism is introduced to describe the structures of polyrotaxane 2D coordination polymers (CPs) that differ only by the relative positions in the neighboring entangled axles. A large ring and a long spacer ligand in 2D CPs yielded four different supramolecular isomers, of which two have an entangled polyrotaxane structure. One pair of C=C bonds in the spacer ligand is well-aligned in one isomer and undergoes [2+2] cycloaddition reaction, whereas the other isomer is photoinert. They also have different sensing efficiency for several aromatic nitro compounds. However, both isomers show selective PL quenching for the Brady's reagent. Structurally similar supramolecular isomers with different photochemical reactivity and sensing abilities appear to be unprecedented.
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