Preparation of metal-TCNQ charge-transfer complexes on conducting and insulating surfaces by photocrystallization

O'Mullane, A, Fay, N, Nafady, A and Bond, A 2007, 'Preparation of metal-TCNQ charge-transfer complexes on conducting and insulating surfaces by photocrystallization', Journal of the American Chemical Society, vol. 129, no. 7, pp. 2066-2073.


Document type: Journal Article
Collection: Journal Articles

Title Preparation of metal-TCNQ charge-transfer complexes on conducting and insulating surfaces by photocrystallization
Author(s) O'Mullane, A
Fay, N
Nafady, A
Bond, A
Year 2007
Journal name Journal of the American Chemical Society
Volume number 129
Issue number 7
Start page 2066
End page 2073
Total pages 8
Publisher American Chemical Society
Abstract A generic method for the synthesis of metal-7,7,8,8- tetracyanoquinodimethane (TCNQ) charge-transfer complexes on both conducting and nonconducting substrates is achieved by photoexcitation of TCNQ in acetonitrile in the presence of a sacrificial electron donor and the relevant metal cation. The photochemical reaction leads to reduction of TCNQ to the TCNQ- monoanion. In the presence of Mx+(MeCN), reaction with TCNQ-(MeCN) leads to deposition of Mx+[TCNQ] X crystals onto a solid substrate with morphologies that are dependent on the metal cation. Thus, CuTCNQ phase I photocrystallizes as uniform microrods, KTCNQ as microrods with a random size distribution, AgTCNQ as very long nanowires up to 30 ?m in length and with diameters of less than 180 nm, and Co[TCNQ]2(H2O)2 as nanorods and wires. The described charge-transfer complexes have been characterized by optical and scanning electron microscopy and IR and Raman spectroscopy. The CuTCNQ and AgTCNQ complexes are of particular interest for use in memory storage and switching devices. In principle, this simple technique can be employed to generate all classes of metal-TCNQ complexes and opens up the possibility to pattern them in a controlled manner on any type of substrate.
Subject Synthesis of Materials
DOI - identifier 10.1021/ja066874o
Copyright notice © 2007 American Chemical Society.
ISSN 0002-7863
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