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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20749
Title: Single electron transfer-driven multi-dimensional signal read-out function of TCNQ as an "off-the-shelf" detector for cyanide
Authors: Ajayakumar M.R.
Mandal K.
Rawat K.
Asthana D.
Pandey, Ravindra
Sharma A.
Yadav S.
Ghosh S.
Mukhopadhyay P.
Published in: ACS Applied Materials and Interfaces
Abstract: Herein we report the first applications of TCNQ as a rapid and highly sensitive off-the-shelf cyanide detector. As a proof-of-concept, we have applied a kinetically selective single-electron transfer (SET) from cyanide to deep-lying LUMO orbitals of TCNQ to generate a persistently stable radical anion (TCNQ•-), under ambient condition. In contrast to the known cyanide sensors that operate with limited signal outputs, TCNQ•- offers a unique multiple signaling platform. The signal readability is facilitated through multichannel absorption in the UV-vis-NIR region and scattering-based spectroscopic methods like Raman spectroscopy and hyper Rayleigh scattering techniques. Particularly notable is the application of the intense 840 nm NIR absorption band to detect cyanide. This can be useful for avoiding background interference in the UV-vis region predominant in biological samples. We also demonstrate the fabrication of a practical electronic device with TCNQ as a detector. The device generates multiorder enhancement in current with cyanide because of the formation of the conductive TCNQ•-. © 2013 American Chemical Society.
Citation: ACS Applied Materials and Interfaces, 5(15): 6996-7000
URI: https://doi.org/10.1021/am4011176
http://repository.iitr.ac.in/handle/123456789/20749
Issue Date: 2013
Keywords: cyanide
off-the-shelf detector
radical anion
signal read-out
single electron transfer
TCNQ
ISSN: 19448244
Author Scopus IDs: 26667563200
57195915855
8218183900
47760999400
57210525673
34870474400
57203296256
56331756100
35586529600
Author Affiliations: Ajayakumar, M.R., Supramolecular and Material Chemistry Lab, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Mandal, K., Supramolecular and Material Chemistry Lab, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Rawat, K., Supramolecular and Material Chemistry Lab, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Asthana, D., Supramolecular and Material Chemistry Lab, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Pandey, R., Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
Sharma, A., Electronic Materials and Device Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Yadav, S., Electronic Materials and Device Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Ghosh, S., Electronic Materials and Device Laboratory, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Mukhopadhyay, P., Supramolecular and Material Chemistry Lab, School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
Corresponding Author: Mukhopadhyay, P.; Supramolecular and Material Chemistry Lab, , New Delhi 110067, India; email: m_pritam@mail.jnu.ac.in
Appears in Collections:Journal Publications [CY]

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