"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

SILICA-MOUNTED FTIR-ACTIVE ORGANOMETALCARBONYL DERIVATIVES AS FUNCTIONAL MATERIALS

C. E. Anson1,2, T. J. Baldwin1, N. J. Clayden1, C. S. Creaser3, O. Egyed3,4, M. A. Fey1, W. E. Hutchinson3, A. Kavanagh1,* , G. R. Stephenson1, P. I. Walker1

Affiliation

  1. Wolfson Materials and Catalysis Centre, School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, UK
  2. Institut für Anorganische Chemie II, Universität Karlsruhe, Engesserstrasse Geb. 30.45, 76128 Karlsruhe, Germany
  3. School of Science, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
  4. Chemical Research Center of the Hungarian Academy of Sciences, PO Box 17, H-1525, Budapest, Hungary

Abstract

Organometalcarbonyl complexes adsorbed onto silica and covalently attached to ~63 mm, ~15 mm and ~7 nm diameter silica particles have been studied by IR and 29Si MAS NMR. The properties of the characteristic vibrational stretching modes of the M-CO groups examined by FTIR spectroscopy using ATR, DRIFT, and an optrode assembly, are discussed. In the 29Si NMR spectra, an additional signal in the -20 ppm region was observed in the presence of the covalently attached organometallic, and the intensity of the Q3 band shoulder of the main bulk Q4 silica signal at –110 ppm was reduced in intensity. Determination of surface loading of the silica by microanalysis, AA, DRIFT and 29Si NMR is compared. The FTIR spectra are compared by the use of Bellamy plots, and normalised differential response ratios are used to quantify the contributions of environmental effects on the relative positions of the n(CO) vibrational stretching modes of organometallic complexes. The terms DR and DN are defined..

Keywords

Organometalcarbonyl sensors, Environment sensitivity, Supported organometallics, 29Si NMR, FTIR optrode, Bellamy plots.

Submitted at: July 10, 2003
Accepted at: July 31, 2003

Citation

C. E. Anson, T. J. Baldwin, N. J. Clayden, C. S. Creaser, O. Egyed, M. A. Fey, W. E. Hutchinson, A. Kavanagh, G. R. Stephenson, P. I. Walker, SILICA-MOUNTED FTIR-ACTIVE ORGANOMETALCARBONYL DERIVATIVES AS FUNCTIONAL MATERIALS, Journal of Optoelectronics and Advanced Materials Vol. 5, Iss. 3, pp. 533-554 (2003)