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Peptide-intercalated layered metal hydroxides effect of peptide chain length and side chain functionality on structural, optical and magnetic properties

  • New hybrid materials have been prepared by grafting synthetic peptides in the interlayer spacing of Cu(II) and Co(II) layered simple hydroxides (LSHs). The interlayer spacing of the hybrids depends on the peptide chain length; the dependence is specific for the copper and cobalt-based hybrids. This suggests a metal-or LSH-specific interaction of the peptides with the respective inorganic layers. When tyrosine is present in the peptide, its fluorescence is quenched after grafting the peptide to the LSH. Studies of the luminescence vs. pH indicate deprotonation of the tyrosine moieties to tyrosinate at high pH, accompanied by the onset of luminescence. The luminescence increases with increasing OH- concentration, suggesting an application of the hybrids as chemical sensors. Moreover, the peptides influence the magnetic properties of the hybrids. The copper-based hybrids behave antiferromagnetically and the cobalt-based hybrids are ferrimagnets.

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Author:Satyabrata Si, Andreas TaubertORCiDGND, Alexandre Mantion, Guillaume Rogez, Pierre Rabu
ISSN:2041-6520 (print)
Parent Title (English):Chemical science
Publisher:Royal Society of Chemistry
Place of publication:Cambridge
Document Type:Article
Year of first Publication:2012
Year of Completion:2012
Release Date:2017/03/26
First Page:1945
Last Page:1957
Funder:CNRS; University of Strasbourg; University of Postdam; MPI of Colloids and Interfaces (Colloid Chemistry Department), Deutsche Forschungsgemeinschaft [TA571/2-1, 7-1]; BAM, Federal Institute for Materials Research and Testing, Berlin, Germany; French Agence Nationale de la Recherche (ANR) [ANR-06-JCJC-0008, ANR-06-BLAN-0117-02]; Division 1
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie
Peer Review:Referiert