Smart Transformation of a Polyhedral Oligomeric Silsesquioxane Shell Controlled by Thiolate Silver(I) Nanocluster Core in Cluster@Clusters Dendrimers. (30th August 2018)

• Record Type: Journal Article
• Authors: Li, Si; Wang, Zhao‐Yang; Gao, Guang‐Gang; Li, Bing; Luo, Peng; Kong, Yu‐Jin; Liu, Hong; Zang, Shuang‐Quan
• Is Part Of: Angewandte Chemie. Volume 130:Number 39(2018)
• Page Start: 12957
• Page End: 12961
• Publication Date: 2018-08-30
• Subjects: Cluster -- Lösungsmitteleffekte -- Polyedrische oligomere Silsesquioxane -- Silber -- Strukturänderungen; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201807548
• Languages: English
• ISSNs: 0044-8249

Abstract

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.