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Amino acid-assisted incorporation of dye molecules within calcite crystals

DOI: 10.1002/anie.201804365 DOI Help

Authors: Bartosz Marzec (University of Leeds) , David C. Green (University of Leeds) , Mark A. Holden (University of Leeds) , Alexander S. Coté (University College London) , Johannes Ihli (University of Leeds) , Saba Khalid (University of Leeds) , Alexander Kulak (University of Leeds) , Daniel Walker (University of Leeds) , Chiu Tang (Diamond Light Source) , Dorothy M. Duffy (University College London) , Yi-yeoun Kim (University of Leeds) , Fiona C. Meldrum (University of Leeds)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition , VOL 108

State: Published (Approved)
Published: June 2018
Diamond Proposal Number(s): 10137

Abstract: Biomineralisation processes invariably occur in the presence of multiple organic additives, which act in combination to give exceptional control over structures and properties. However, few synthetic studies have investigated the cooperative effects of soluble additives. This work addresses this challenge and focuses on the combined effects of amino acids and coloured dye molecules. The experiments demonstrate that strongly coloured calcite crystals only form in the presence of Brilliant Blue R (BBR) and four of the seventeen soluble amino acids, as compared with almost colourless crystals using the dye alone. The active amino acids are identified as those which themselves effectively occlude in calcite, suggesting a mechanism where they can act as chaperones for individual molecules or even aggregates of dyes molecules. These results provide new insight into crystal–additive interactions and suggest a novel strategy for generating materials with target properties.

Journal Keywords: biomimetics; biomineralization; calcium carbonate; crystal growth; nanocomposites

Subject Areas: Chemistry

Instruments: I11-High Resolution Powder Diffraction