Surface polymerization of poly(p -phenylene-terephthalamide) on Ag(111) investigated by X-ray photoelectron spectroscopy and scanning tunneling microscopy

Journal article


Publication Details

Author(s): Schmitz CH, Schmid M, Gärtner S, Steinrück HP, Gottfried M, Sokolowski M
Journal: Journal of Physical Chemistry C
Publisher: American Chemical Society
Publication year: 2011
Volume: 115
Journal issue: 37
Pages range: 18186-18194
ISSN: 1932-7447
eISSN: 1932-7455


Abstract


The formation of poly(p-phenylene-terephthalamide) (PPTA) by surface-assisted polymerization of terephthaloyl chloride (TPC) and p-phenylenediamine (PPD) on Ag(111) has been studied by X-ray photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM). Analysis of the XPS data reveals that the polymer is formed in the (sub-) monolayer regime already at room temperature. Upon vacuum deposition of TPC onto the single-crystal surface, the carbon-chlorine bond is cleaved, and the polymerization proceeds via a p-phenylene dicarbonyl species, which is presumably surface stabilized. This contrasts the reaction mechanism in solution, where the chlorine atom is expelled after a nucleophilic attack by the amine group. Annealing of the sample leads to desorption of residual PPD monomers, lateral ordering of the polymer chains, and further progress of the polymerization that can be followed by XPS. The chain length distribution of the polyamide, as extracted from the XP spectra, is consistent with the typical chain lengths found in STM images. © 2011 American Chemical Society.



FAU Authors / FAU Editors

Schmid, Martin Dr.
Lehrstuhl für Physikalische Chemie II
Steinrück, Hans-Peter Prof. Dr.
Lehrstuhl für Physikalische Chemie II


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions with authors

Rheinische Friedrich-Wilhelms-Universität Bonn


Research Fields

D Catalytic Materials
Exzellenz-Cluster Engineering of Advanced Materials
B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials


How to cite

APA:
Schmitz, C.H., Schmid, M., Gärtner, S., Steinrück, H.-P., Gottfried, M., & Sokolowski, M. (2011). Surface polymerization of poly(p -phenylene-terephthalamide) on Ag(111) investigated by X-ray photoelectron spectroscopy and scanning tunneling microscopy. Journal of Physical Chemistry C, 115(37), 18186-18194. https://dx.doi.org/10.1021/jp202986r

MLA:
Schmitz, Christoph H., et al. "Surface polymerization of poly(p -phenylene-terephthalamide) on Ag(111) investigated by X-ray photoelectron spectroscopy and scanning tunneling microscopy." Journal of Physical Chemistry C 115.37 (2011): 18186-18194.

BibTeX: 

Last updated on 2019-06-08 at 09:04