Send to

Choose Destination
J Am Chem Soc. 2017 Jun 21;139(24):8174-8185. doi: 10.1021/jacs.7b01326. Epub 2017 Jun 8.

Supersnowflakes: Stepwise Self-Assembly and Dynamic Exchange of Rhombus Star-Shaped Supramolecules.

Author information

Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, School of Chemistry, Central China Normal University , Wuhan, Hubei 430079, China.
Department of Chemistry, University of South Florida , Tampa, Florida 33620, United States.
Department of Chemistry, Texas State University , San Marcos, Texas 78666, United States.
Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia , Athens, Georgia 30602, United States.
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University , Shanghai 200062, China.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun, Jilin 130012, China.


With the goal of increasing the complexity of metallo-supramolecules, two rhombus star-shaped supramolecular architectures, namely, supersnowflakes, were designed and assembled using multiple 2,2':6',2″-terpyridine (tpy) ligands in a stepwise manner. In the design of multicomponent self-assembly, ditopic and tritopic ligands were bridged through Ru(II) with strong coordination to form metal-organic ligands for the subsequent self-assembly with a hexatopic ligand and Zn(II). The combination of Ru(II)-organic ligands with high stability and Zn(II) ions with weak coordination played a key role in the self-assembly of giant heteroleptic supersnowflakes, which encompassed three types of tpy-based organic ligands and two metal ions. With such a stepwise strategy, the self-sorting of individual building blocks was prevented from forming the undesired assemblies, e.g., small macrocycles and coordination polymers. Furthermore, the intra- and intermolecular dynamic exchange study of two supersnowflakes by NMR and mass spectrometry revealed the remarkable stability of these giant supramolecular complexes.


Supplemental Content

Full text links

Icon for American Chemical Society
Loading ...
Support Center