A near-edge x-ray absorption fine structure (NEXAFS) spectroscopy investigation on the electronic structure of some novel pi-conjugated organometallic polymers is presented. The investigated materials consist of Pt and Pd(II) complex units linked together through sigma-bonded organic spacers of ethynyl-thiophene type in a polymeric array. The C K-edge NEXAFS spectra were interpreted by comparison with literature data and with the spectra of reference samples. The linking between the thiophene rings and alkyne groups produces a splitting of the C1s --> pi* peak observed in the spectra of the thiophene systems. Angle-dependent measurements, performed at normal and grazing incidence of the linearly polarized photons, evidenced a preferential orientation of the polymer chains with an average tilt angle of 45degrees for the thiophene moieties. Copyright (C) 2002 John Wiley Sons, Ltd.
Thiophene-containing organometallic polymers studied by near-edge x-ray absorption spectroscopy / G., Polzonetti; G., Iucci; P., Altamura; A., Ferri; G., Paolucci; A., Goldoni; Ph, Parent; C., Laffon; Russo, Maria Vittoria. - In: SURFACE AND INTERFACE ANALYSIS. - ISSN 0142-2421. - 34:1(2002), pp. 588-592. (Intervento presentato al convegno 9th European Conference on Applications of Surface and Interface Analysis tenutosi a AVIGNON, FRANCE nel SEP 30-OCT 05, 2001) [10.1002/sia.1366].
Thiophene-containing organometallic polymers studied by near-edge x-ray absorption spectroscopy
RUSSO, Maria Vittoria
2002
Abstract
A near-edge x-ray absorption fine structure (NEXAFS) spectroscopy investigation on the electronic structure of some novel pi-conjugated organometallic polymers is presented. The investigated materials consist of Pt and Pd(II) complex units linked together through sigma-bonded organic spacers of ethynyl-thiophene type in a polymeric array. The C K-edge NEXAFS spectra were interpreted by comparison with literature data and with the spectra of reference samples. The linking between the thiophene rings and alkyne groups produces a splitting of the C1s --> pi* peak observed in the spectra of the thiophene systems. Angle-dependent measurements, performed at normal and grazing incidence of the linearly polarized photons, evidenced a preferential orientation of the polymer chains with an average tilt angle of 45degrees for the thiophene moieties. Copyright (C) 2002 John Wiley Sons, Ltd.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
