Akademik Veri Yönetim Sistemi
3rd International Eurasian Conference on Science, Engineering and Technology (EurasianSciEnTech 2021), Ankara, Türkiye, 15 - 17 Aralık 2021, ss.477-483
Interest in the design, synthesis and use of electroactive oligomeric molecules with precise control over type
and number of electroactive units have become more pronounced in recent years. Recently, interest has also
focused to combine electroactive oligomers with non-electroactive species. This approach will lead to the gain
of attractive features such as mechanical and processing properties, functionality, and supramolecular structure
formation. Such non-electroactive species include simple alkyl blocks, oligopeptide, and other bio-based
blocks, and other structure-directing blocks or functional units. Aniline oligomers have received much
attention owing to their excellent solubility in common solvents and easier control over chemical structures
and oxidation states compared to polyaniline (PAni). In addition, their electrical, chemical, and optical
properties are comparable to those of PAni, making them an attractive class of materials for further exploitation
of challenges that are facing the global scientific community.
In this study, the preparation and development of novel electroactive supramolecular structures with the aid of
metal-ligand coordination interactions using simple biological motifs are investigated. These electroactive
supramolecular structures are proposed to be used in supercapacitors as electrode materials. For this purpose,
a novel system comprised of a di-topic structure where the end of NH2/NH2 end-capped tetra(aniline) coupled
with histidine (His2 -TANI) was synthesized and characterized structurally by several techniques such as 1HNMR spectroscopy, mass spectrometry, UV-vis spectroscopy, and TEM analysis. With this design histidine
acts as coordination sites, and upon mixing with divalent transition metal ions such as Cu(II), metal coordination complexes form supramolecular structures. While flake like structures were observed for His2-
TANI, spherical aggregates with diameters of ca. 25 nm were obtained for His2-TANI-Cu complex in
methanol.