Pyrene C16H10
Pyrene C16H10
Pyrene (benzo[def]phenantren) C16H10 – colorless crystals, molar mass 202,26 g/mol), d= 1.27 g/cm3, mp.156°C, bp. 394°C, vapor pressure 65mPa/63.5°C, unsoluble in water (0.135mg/L at 25°C), soluble in diethyl ether and aromatic solvents.
Pyrene for CNTs and nanofibers by PECVD
Pyrene for CNTs and nanofibers by PECVD
Pyrene C16H10 has been applied as carbon precursor for the growth of graphitic carbon nanofiber and nanotube ensembles by CVD within the pores of an alumina template membrane with reactor temperatures of 545 °C for Ni-catalyzed CVD and 900 °C for the uncatalyzed process. Pyrene precursor was evaporated at 200 °C.
The prepared carbon nanostructures were uniform hollow nanotubes with open ends, which with increasing the deposition time converted to carbon nanofibers. The as-deposited graphitic carbon nanofibers grown using Ni catalyst were not highly ordered. Heating the carbon-containing membrane at 500 °C for 36 h converted carbon nanofibers into highly ordered graphite, as detrrmined by XTEM and electron diffraction ED. The ED measurement represented a spotted diffraction pattern characteristic of single-crystal graphite with the graphitic planes parallel to the long axis of the nanofibers. [[i]]
[i] G. Che, B. B. Lakshmi, C. R. Martin, E. R. Fisher, Rodney S. Ruoff, Chem. Mater. 1998, 10, 260-267, “Chemical Vapor Deposition Based Synthesis of Carbon Nanotubes and Nanofibers Using a Template Method”,
http://bucky-central.me.utexas.edu/RuoffsPDFs/76.pdf
Paracyclophane
Paracyclophane
Ge-containing paracyclophane monomer for poly(p-xylylene) incorp. Ge crystals by CVD
Germanium-containing paracyclophane monomer has been applied as CVD precursor for the growth of poly(p-xylylene) films incorporating Ge crystals. Such metal-containing polymer films are interesting for potential sensor, magnetic, nonlinear optical, and catalytic applications.
Vapor pyrolysis of the monomer gives copolymer films with Ge fragments, which are thermally decomposed to Ge crystals. This leads to an increase in film conductivity and there is the potential for an application as a humidity sensor.[[i][PS1] ]
[i]Henning Hopf, Genrikh N. Gerasimov, Sergei N. Chavalun, Valerial I. Rozenberg, Elena L. Popova, Elena V. Nikolaeva, Evgenii I. Grogoriev, S.A. Zavjalov, L.I. Trakhtenberg
Metal-containing poly (p-xylylene) films by CVD: Poly (p-xylylene) with germanium crystals
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