Volume 57, Issue 39 pp. 12775-12779
Communication

Smart Transformation of a Polyhedral Oligomeric Silsesquioxane Shell Controlled by Thiolate Silver(I) Nanocluster Core in Cluster@Clusters Dendrimers

Si Li

Si Li

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

These authors contributed equally to this work.

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Zhao-Yang Wang

Zhao-Yang Wang

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

These authors contributed equally to this work.

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Prof. Dr. Guang-Gang Gao

Prof. Dr. Guang-Gang Gao

School of Materials Science and Engineering, University of Jinan, Jinan, 250022 China

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Bing Li

Bing Li

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Peng Luo

Peng Luo

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Yu-Jin Kong

Yu-Jin Kong

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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Prof. Dr. Hong Liu

Prof. Dr. Hong Liu

School of Materials Science and Engineering, University of Jinan, Jinan, 250022 China

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Prof. Dr. Shuang-Quan Zang

Corresponding Author

Prof. Dr. Shuang-Quan Zang

College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 China

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First published: 14 August 2018
Citations: 70

Graphical Abstract

An atom-precise Ag12@POSS6 dendritic complex (POSS=polyhedral oligomeric silsesquioxane) has been synthesized. The central silver(I) cluster core underwent a reversible structural transformation with solvent stimuli, leading to the rearrangement of the shell POSS clusters from pseudo-octahedral to quasi-octahedral.

Abstract

Using polyhedral oligomeric silsesquioxane (POSS) modified by a thiol group as a protected ligand, atom-precise multi-heteorocluster-based dendrimers Ag12@POSS6 (1 a and 1 b) were assembled. Through the reactive −SH groups, six POSS shell ligands stabilize the central 12-core silver(I) cluster by diverse Ag−S interactions. When such Ag12@POSS6 complex was stimulated by different solvents (acetone or tetrahydrofuran), the core Ag12 silver(I) cluster underwent reversible structural transformation between flattened cubo-octahedral (in 1 a) and normal cubo-octahedral (in 1 b); concomitantly shell POSS clusters rearranged from pseudo-octahedral to quasi-octahedral. Furthermore, the film matrix modified by 1 a or 1 b showed different hydrophobicity.

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