Abstract
Benzoic hydroxamate-based monomeric and dimeric Fe(iii) complexes has been investigated as humic acid models. The stability in pure water and seawater was monitored and the ability to release iron has been examined with the algae feeding trials.
Highlights
Iron has been recognized as an essential trace element for all living organisms, ranging from archaea to mammals and is required for the function of many proteins and enzymes
The hydroxamate ligands were synthesized starting from the respective commercially available benzoic acids, which were converted into the corresponding methyl esters 1c–1l
We present the synthesis of 11 novel iron(III) complexes as promising model compounds for humic acids
Summary
Iron has been recognized as an essential trace element for all living organisms, ranging from archaea to mammals and is required for the function of many proteins and enzymes. Photosynthesis as well as nitrogen assimilation is dependent on iron-based enzyme cofactors.[1,2,3] More than 50% of the photosynthetic activity on earth is attributed to phytoplankton, which consists of photoautotrophic microscopic organisms.[3,4,5] They are responsible for a major part of the global biosynthesis of organic compounds from inorganic carbon dioxide dissolved in water and play a key role in the global CO2 cycle. Stable iron(III) precipitates in oxygenated seawater at pH 8 as
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