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Langmuir–Blodgett Films Containing TCNQ Incorporated from the Aqueous Subphase

✍ Scribed by Pilar Cea; Hector Artigas; Jose S. Urieta; Maria C. Lopez; Felix M. Royo

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 197 KB
Volume: 243
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2001.7886

No coin nor oath required. For personal study only.

✦ Synopsis

Films containing TCNQ (tetracyanoquinodimethane) anions

were prepared by incorporating it from a LiTCNQ aqueous subphase. The TCNQ moiety was transferred from the subphase as the counterion of a positively charged monolayer of DPOP + (diphenylbis(octadecylamino)phosphonium). The isotherm shape, the area per molecule, the collapse pressure, and the monolayer stability were dependent on the LiTCNQ concentration in the subphase. The obtained Langmuir-Blodgett films were classified into three types depending on the TCNQ oxidation state. The oxidation state depends on the transference pressure as well as on the monolayer age. The degree of both order and architecture of the films was studied by means of SEM, IR, UV-vis spectroscopy, and X-ray diffraction. Conductivity studies were also performed.

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