1,2,3,4-Tetrahydroquinoline
1,2,3,4-tetrahydroquinoline has been applied for the nonsubstituted quinoline oligomers and polyquinoline-based conducting polymer thin films (200 – 2000Å) by the CVD-like technique called catalytic dehydrogenative polycondensation (CDHP), utilizing transition metal sulfides as catalysts. Highly thermal-oxidation-stable conducting polymers with an excellent adhesion to the substrate surface were prepared; the films exhibited a low resistivity without chemical doping and high stability at elevated temperatures. The conductivity of the CVD thin films prepared at 900°C were found to be 695, 700, 750 and 920S/cm at 30K, 150K, 300K and 950K, respectively. For the samples treated at temperatures above 800°C, the resistivity was found to be very weakly temperature dependent. For example, the 900°C treated sample gave a resistance ratio of R30K/R950K equal to only 1.32, and a resistance maximum at 30K. [[i] ]
[i] L.Y Chiang, J.W Swirczewski, F Lai, D.P Goshorn, Synthetic Metals, Volume 42, Issues 1–2, 15 May 1991, Pages 1425–1431, Proceedings of the International Conference on Science and Technology of Synthetic Metals, “New chemistry to the synthesis of quinoline oligomers and a CVD technique for high temperature conducting thin films”
http://dx.doi.org/10.1016/0379-6779(91)91870-G ,
(Hetero)aromatic N-containing ring systems
(Hetero)aromatic nitrogen-containing ring systems, have been applied for the growth of nitrogen-doped graphene and carbon films on copper by thermal CVD. The structure and quality of the resulting films were correlated to the influence of the functional groups of the precursor molecules and gas phase composition. The deposited films have been characterized by SEM, TEM, EDX, XPS, and Raman spectroscopy. The presence of (N-doped) graphene was confirmed by the 2D mode of the Raman spectra. The isolated graphene films obtained from nitrogen-containing precursors revealed a high conductivity and transparency compared to standard graphene CVD samples. [[i] ]