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Updated: March 26, 2000



Catalog Numbers:     3ODOP
Appearance: Pale purple powder
Revision: 1.3 (March 2000)

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[3ODOP-PDF]  Instructions (PDF)
[3ODOP-PDF]  Material Safety Data Sheet (PDF)

General Information

3-OCTADECANOYLPYRROLE is a surface-active pyrrole derivative which may be oxidised to form a highly conductive molecular monolayer which is an ideal material for electron microscopy substrates.1 It may be mixed with pyrrole and applied to a water surface containing ferric chloride (FeCl3). Langmuir-Blodgett techniques may be used to control the film produced.

3-OCTADECANOYLPYRROLE is supplied pure, as a powder. It should be refrigerated upon receipt, and stored at 2 - 8°C.

Instructions for Use

Formation of EM substrate films:1 Cast a solution of the pyrrole in ethyl acetate (0.0015 g/mL) onto an air-water interface where the water contains 1 wt % ferric chloride. Free pyrrole as a vapor is added to initiate polymerization (place both the solution and an open container of pyrrole under a bell jar); the films may be controlled by using dental floss to control their spread, or more effectively by using a Langmuir-Blodgett trough for their generation. Drop the grids onto the film, then pick them up, wash as for thin carbon films, and apply the sample as usual.

General: Detailed instructions for monolayer formation, oxidation and monolayer manipulation are described by Hong et al.2 Pure 3-OCTADECANOYLPYRROLE, or 1 : 300 or 1 : 5000 mixtures with pyrrole, are applied to the surface of a 1 wt % ferric chloride solution, then washed with deionized water and 5 % HCl after oxidation. Highly conducting films may be prepared by the method of Bocchi,3 using a solution of pure 3-OCTADECANOYLPYRROLE applied to the surface of a 10 wt % solution of ferric chloride.


  1. Simon, M. N.; Lin, B. Y.; Lee, H. S.; Skotheim, T. A., and Wall, J. S.: Proc. XIIth Int. Congress for Electr. Micr., San Francisco Press, Inc., San Francisco, CA, 1990; Vol. 1, pp. 290-291.

  2. Hong, K., and Rubner, M. F.; Thin Solid Films, 1988, 160, 187; Hong, K.; Rosner, R. B., and Rubner, M. F.; Chem. Mater., 1990, 2, 82.

  3. Bocchi, V., and Gardini, G. P.; J. Chem. Soc. Chem. Commun., 1986, 148.
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