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Quantitative Analysis of the Self‐Assembly Process of a Pd 12 L 24 Coordination Sphere
Author(s) -
Kai Shumpei,
Shigeta Taro,
Kojima Tatsuo,
Hiraoka Shuichi
Publication year - 2017
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201701351
Subject(s) - coordination sphere , intermolecular force , chemistry , self assembly , crystallography , coordination number , ion , stereochemistry , molecule , crystal structure , organic chemistry
The self‐assembly process of a Pd 12 L 24 sphere was revealed by a quantitative approach (quantitative analysis of self‐assembly process: QASAP) quantifying all the substrates, the products, and the observable intermediates, indicating that the Pd 12 L 24 sphere is produced through several pathways. Firstly, Pd n L 2 n ( n= 6, 8, and 9), which are perfectly closed structures smaller than the Pd 12 L 24 sphere, and a mixture of intermediates not observed by NMR ( Int ) were produced. Next, the sphere was assembled from intra‐/intermolecular reaction of a certain class of Int (path A) and from the coordination of free pyridyl groups in Int to the Pd II center of Pd n L 2 n ( n= 6, 8, and 9) (path B). While capping the free pyridyl groups in Int with Pd II ions perfectly inhibited the sphere formation, the addition of free L to Int accelerated the formation of the sphere.