Abstract
Natural pink degradation products of chlorophyll occur in de-greened leaves. They form blue transition metal complexes, some of which show intensive red fluorescence and may serve as highly sensitive reporters of transition metals in plants.
Highlights
Chlorophyll breakdown is commonly associated with the appearance of the fall colours.[1,2,3] chlorophyll catabolites from higher plants were primarily expected to be coloured compounds.[1]
The pink chlorophyll catabolites (PiCCs) binds zinc, cadmium, copper- and nickel-ions with high affinity. Binding of these metal ions to the PiCC is rapid at room temperature
We report on the blue complexes of the bilin-type pink chlorophyll catabolite (PiCC) 1
Summary
Chlorophyll breakdown is commonly associated with the appearance of the fall colours.[1,2,3] chlorophyll catabolites from higher plants were primarily expected to be coloured compounds.[1]. AInstitute of Organic Chemistry & Centre of Molecular Biosciences, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria. E-mail: bernhard.kraeutler@ uibk.ac.at bInstitute of General, Inorganic & Theoretical Chemistry, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria † Electronic supplementary information (ESI) available: Experimental details on crystal structure, for syntheses, spectral analyses of new compounds, kinetic analysis of metal incorporation and detection of Zn and Cd-ions in solution. With four biologically relevant transition metals, as well as on the crystal structure of 1, the rst of a chlorophyll-derived ‘phyllobilin’ from a higher plant.[5]
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