NDLI: Light-induced decarboxylation in a photo-responsive iron-containing complex based on polyoxometalate and oxalato ligands

Content Provider	Royal Society of Chemistry (RSC)
Author	Duan, Yan Clemente-Juan, Juan M. Waerenborgh, João C. Giménez-Saiz, Carlos Coronado, Eugenio
Copyright Year	2017
Abstract	A new photoresponsive molecular polyanion in which two Fe(III) ions are simultaneously coordinated by two [A-α-PW9O34]9− polyoxometalate units and two oxalato ligands has been obtained. When irradiated with UV light its potassium salt, 1, exhibits a remarkable photocoloration effect, attributable to the partial reduction of the POM units to give rise to a mixed-valence species. The photoinduced process is intramolecular and involves electron transfer from the oxalato ligands, which partially decompose releasing CO2, towards the Fe(III) and the POM. This mechanism has been confirmed by DRS, IR, XPS and Mössbauer spectroscopy, magnetism and elemental analysis. An analogous derivative of 1 containing malonato ligands does not exhibit such photoactive behaviour, which is evidence that the oxalate ligand is essential for the photoactivity of 1. To our knowledge, 1 represents the first POM-based compound in which the photocoloration effect does not require the presence of intermolecular short interactions.
Starting Page	305
Ending Page	315
Page Count	11
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	8
Issue Number	1
Journal	Chemical Science
DOI	10.1039/c6sc01919f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Ligand Polyatomic ion Mössbauer spectroscopy Polyoxometalate Potassium POM
Content Type	Text
Resource Type	Article
Subject	Chemistry

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