resumo
The new amino acid based [H-beta-(3-pyridyl)-Ala-OH][ClO4] and [H-beta-(4-pyridyl)-Ala-OH][ClO4] crystals were synthesized, and their structure and functional piezoelectric properties were investigated in detail. Both analogs crystallize in the polar, piezoelectric P2(1) space group. Piezoresponse force microscopy (PFM) measurements revealed that shear piezoelectric coefficient of [H-beta-(3-Pyridyl)-Ala-OH][ClO4] crystal is more than twice that in the widely used transducer material lithium niobate, LiNbO3. The crystal structures of both perchlorate derivatives were determined, and the influence of the inter- and intramolecular hydrogen bond network on piezoelectricity of crystals were discussed. The existence of the intramolecular hydrogen bonding was confirmed by means of IR spectroscopy measurements. Thermogravimetric (TGA) technique was applied to study the thermal behavior of title crystals.
palavras-chave
PEPTIDE NANOSTRUCTURES; DIPHENYLALANINE; PHENYLALANINE; PERCHLORATE; NANOTUBES
categoria
Chemistry; Crystallography; Materials Science
autores
Wojtas, M; Kinzhybalo, V; Bdikin, I; Kholkin, AL
nossos autores
Andrei Kholkin
Investigador PrincipalProjectos
agradecimentos
The work was supported by Faculty of Chemistry, University of Wroclaw, program The Leading National Research Center (KNOW) for the years 2014-2018. This work was also developed within the scope of the project CICECO-Aveiro Institute of Materials FCT Ref. UID/CTM/50011/2019, financed by national funds through the FCT/MCTES. I.B. and A.L.K. acknowledges FCT for its financial support (grants IF/00582/2015, PTDC/CTM-CTM/31679/2017 and POCI-01-0145-FEDER-031132). M.W. would like to thank Prof. Roman Szostak for carrying out the measurements of the Raman spectroscopy.