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Exploring the Symmetry, Structure, and Self‐Assembly Mechanism of a Gigantic Seven‐Fold Symmetric {Pd 84 } Wheel
Author(s) -
Scullion Rachel A.,
Surman Andrew J.,
Xu Feng,
Mathieson Jennifer S.,
Long DeLiang,
Haso Fadi,
Liu Tianbo,
Cronin Leroy
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201404621
Subject(s) - chemistry , self assembly , size exclusion chromatography , symmetry (geometry) , fold (higher order function) , scattering , crystallography , electrospray , mass spectrometry , chemical physics , chromatography , physics , optics , geometry , mathematics , organic chemistry , computer science , enzyme , programming language
Abstract The symmetry, structure and formation mechanism of the structurally self‐complementary { Pd 84 } = [Pd 84 O 42 (PO 4 ) 42 (CH 3 CO 2 ) 28 ] 70− wheel is explored. Not only does the symmetry give rise to a non‐closest packed structure, the mechanism of the wheel formation is proposed to depend on the delicate balance between reaction conditions. We achieve the resolution of gigantic polyoxopalladate species through electrophoresis and size‐exclusion chromatography, the latter has been used in conjunction with electrospray mass spectrometry to probe the formation of the ring, which was found to proceed by the stepwise aggregation of {Pd 6 } − = [Pd 6 O 4 (CH 3 CO 2 ) 2 (PO 4 ) 3 Na 6− n H n ] − building blocks. Furthermore, the higher‐order assembly of these clusters into hollow blackberry structures of around 50 nm has been observed using dynamic and static light scattering.