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Angewandte Chemie International Edition
Communication

Spatial, Hysteretic, and Adaptive Host–Guest Chemistry in a Metal–Organic Framework with Open Watson–Crick Sites*

Hong Cai

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

Department of Chemistry, Hanshan Normal University, Chaozhou, Guangdong 521041 (China)

These authors contributed equally.Search for more papers by this author
Mian Li

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

These authors contributed equally.Search for more papers by this author
Xiao‐Rong Lin

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

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Wei Chen

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

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Prof. Guang‐Hui Chen

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

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Prof. Xiao‐Chun Huang

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

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Prof. Dan Li

Corresponding Author

E-mail address:dli@stu.edu.cn

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)

Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Guangdong 515063 (China)
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First published: 15 July 2015
Cited by: 29
*

This research is financially supported by the National Basic Research Program of China (973 Program, 2012CB821706 and 2013CB834803) and the National Natural Science Foundation of China (91222202 and 21171114). We are grateful for constructive criticism and suggestions from the reviewers and Prof. Jie‐Peng Zhang (Sun Yat‐Sen University).

Abstract

Biological and artificial molecules and assemblies capable of supramolecular recognition, especially those with nucleobase pairing, usually rely on autonomous or collective binding to function. Advanced site‐specific recognition takes advantage of cooperative spatial effects, as in local folding in protein–DNA binding. Herein, we report a new nucleobase‐tagged metal–organic framework (MOF), namely ZnBTCA (BTC=benzene‐1,3,5‐tricarboxyl, A=adenine), in which the exposed Watson–Crick faces of adenine residues are immobilized periodically on the interior crystalline surface. Systematic control experiments demonstrated the cooperation of the open Watson–Crick sites and spatial effects within the nanopores, and thermodynamic and kinetic studies revealed a hysteretic host–guest interaction attributed to mild chemisorption. We further exploited this behavior for adenine–thymine binding within the constrained pores, and a globally adaptive response of the MOF host was observed.

Number of times cited: 29

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