NDLI: Hydrogen-bond and metal-ligand coordination bond hybrid supramolecular capsules: identification of hemicapsular intermediate and dual control of guest exchange dynamics.

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Year: 2014 Volume: 9 Issue: 3

Year: 2014 Volume: 9 Issue: 2

Year: 2014 Volume: 9 Issue: 1

Hydrogen-bond and metal-ligand coordination bond hybrid supramolecular capsules: identification of hemicapsular intermediate and dual control of guest exchange dynamics.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Nito, Yuki Adachi, Hirofumi Toyoda, Naoaki Takaya, Hikaru Kobayashi, Kenji Yamanaka, Masamichi
Description	Author Affiliation: Nito Y ( Department of Chemistry, Graduate School of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529 (Japan), Fax: (+81) 54-237-3384.)
Abstract	Hybrid supramolecular capsules self-assemble by simultaneously forming hydrogen and metal-ligand coordination bonds on mixing a C2-symmetrical cavitand (calix[4]resorcinarene-based cavitands with ureide and terminal 4-pyridyl units) with platinum or palladium complexes ([Pt(OTf)2] or [Pd(OTf)2] with chelating bisphosphines) in 1:1 ratio. Hemicapsular assemblies formed in the presence of excess amounts of cavitand relative to the platinum or palladium complexes are identified as intermediates in the above self-assembly process by 2D-NOESY spectroscopy. External-anion-assisted encapsulation of a neutral guest, 4,4'-diiodobiphenyl, inside the hybrid supramolecular capsules accompanied conformational changes in the hydrogen-bonding moieties. The in/out exchange ratio of the encapsulated guest depends on the bite angle of the bisphosphine ligand. Addition of DMSO accelerates guest exchange by weakening the hydrogen bonds in the encapsulation complex. Therefore, variations in the structure of the metal complex and amount of polar solvent exert dual control on the dynamics of the guest exchange.
File Format	HTM / HTML
ISSN	18614728
Issue Number	4
Journal	Chemistry - An Asian Journal
Volume Number	9
e-ISSN	1861471X
Language	English
Publisher	Wiley-VCH
Publisher Date	2014-04-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Biochemistry

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