Dear Emmanuelle,

I worked with plants and metals a little in my post-doc as a collaboration. We found that ZnO-exposed wheat was binding Zn as a phosphate complex. Probably a Zn-phytate. But the coordination is close enough to the inorganic mineral hopeite for XANES fingerprinting. Data from the paper is attached here. The reference is a standard Zn foil reference.

https://link.springer.com/article/10.1007/s11051-012-1125-9

From my recollection, phytate-metal complexes are fairly ubiquitous in plants, but particularly so in the cereal grains. It is probably worth finding a Zn-phytate reference, but we never had the time and money to synthesize one.

Best regards,

Drew Latta

From: Ifeffit [mailto:ifeffit-bounces@millenia.cars.aps.anl.gov] On Behalf Of emmanuelle Montarges-Pelletier
Sent: Friday, May 18, 2018 8:46 AM
To: ifeffit@millenia.cars.aps.anl.gov
Subject: [Ifeffit] XANES spectra of Zn-organic references

Dear all

We have measured Zn XANES spectra within biological samples (seeds), in ambient conditions (room temperature). In order to interprete the spectra, we are searching for Zn-organic reference spectra (XANES only). 

Indeed, we would be interested by Zn organic compounds with sulfur and/or nitrogen and/or oxygen in the first shell of coordination. On the joined graph are plotted the experimental spectra (microspectra on seeds), compared to Zn-citrate and Zn-cysteine. Energy calibration was checked for all spectra.

thanks in advance for your answers

best regards

Emmanuelle

Emmanuelle MONTARGES-PELLETIER
Chargée de Recherche CNRS


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