NDLI: Bipyridine based metallogels: an unprecedented difference in photochemical and chemical reduction in the <i>in situ</i> nanoparticle formation

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Dalton Transactions Vol - 46 Issue - 8

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Bipyridine based metallogels: an unprecedented difference in photochemical and chemical reduction in the in situ nanoparticle formation

Content Provider	Royal Society of Chemistry (RSC)
Author	Bertula, Kia Rissanen, Kari Hietala, Sami Nonappa Tatikonda, Rajendhraprasad Haukka, Matti
Copyright Year	2017
Abstract	Metal co-ordination induced supramolecular gelation of low molecular weight organic ligands is a rapidly expanding area of research due to the potential in creating hierarchically self-assembled multi-stimuli responsive materials. In this context, structurally simple O-methylpyridine derivatives of 4,4′-dihydroxy-2,2′-bipyridine ligands are reported. Upon complexation with Ag(I) ions in aqueous dimethyl sulfoxide (DMSO) solutions the ligands spontaneously form metallosupramolecular gels at concentrations as low as 0.6 w/v%. The metal ions induce the self-assembly of three dimensional (3D) fibrillar networks followed by the spontaneous in situ reduction of the Ag-centers to silver nanoparticles (AgNPs) when exposed to daylight. Significant size and morphological differences of the AgNP's was observed between the standard chemical and photochemical reduction of the metallogels. The gelation ability, the nanoparticle formation and rheological properties were found to be depend on the ligand structure, while the strength of the gels is affected by the water content of the gels.
Starting Page	2793
Ending Page	2802
Page Count	10
File Format	HTM / HTML PDF
ISSN	14779226
Volume Number	46
Issue Number	9
Journal	Dalton Transactions
DOI	10.1039/c6dt04253h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DMSO Bipyridine Dimethyl sulfoxide Self-assembly Photochemistry Nanoparticle Rheology Ligand
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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