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Electrochemical Charge Transfer Through the Supramolecular Discogen‐DNA Hybrid Multi‐layered Assembly
Author(s) -
Pandey Rakesh K.,
Pandey Himani,
Nayak Alpana
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201800625
Subject(s) - ferrocyanide , electron transfer , ferrocene , redox , electrochemistry , supramolecular chemistry , materials science , molecular wire , ionic bonding , chemistry , chemical engineering , nanotechnology , inorganic chemistry , ion , electrode , photochemistry , molecule , organic chemistry , engineering
In the present work, charge transfer phenomenon through the films of an ionic discotic liquid crystal (discogen) that is pyridinium tethered with hexaalkoxytriphenylene (PyTp) and its complex with DNA (PyTp‐DNA) was studied by using electrochemical methods. The PyTp and PyTp‐DNA hybrid films were first formed at the air‐water interface and then transferred onto the gold substrates by Langmuir‐Blodgett (LB) technique. Electrochemical measurements carried out on these films in three different redox systems, namely, ferrocene, hexaammineruthenium (III), and ferrocyanide, revealed that the ferrocene and the hexaammineruthenium (III) systems allow the electron transfer reaction between redox probes and metal, whereas the ferrocyanide system completely blocks it. The electrochemical response of the films, in the former two systems, has been attributed to the bridge mediated electron transfer process, whereas, in the ferrocyanide system, the impermeability of redox ions through these LB films is responsible for the complete blocking of electron transfer. Based on the observed results, this work highlights the possibility of novel charge transfer properties of discogen‐DNA type hybrid films for applications in molecular electronics.