Radiation-induced radical cations in condensed phases: from basic studies to prospective applications

Información del proyecto

Identificador del acuerdo de subvención: INTAS-2000-00093

Proyecto cerrado

Fecha de inicio 1 Julio 2001

Fecha de finalización 30 Junio 2004

Financiado con arreglo a

• International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Coste total

Sin datos

Aportación de la UE

€ 90 000,00

Coordinado por

University of Linkoping
Sweden

Objetivo

Organic radical cations are supposed to be the principal reactive intermediates in a wide variety of chemical processes induced by radiation and oxidising agents in liquid and solid phases. The present joint research project aims at further investigation of the factors controlling trapping and reactions of unstable aliphatic radical cations and mechanisms of spin and charge interactions in condensed phases. In addition to basic studies, the project includes model investigations oriented at novel potential applications, which will exploit unique features of the radical cations, e.g. their specific reactivity and magnetic sensitivity.

Main directions of the planned research work are as follows:
- investigation of kinetics and mechanism of distant positive hole transfer and formation of solute radical cations in solid and liquid phase using conventional EPR and techniques sensitive to magnetic and electric fields;
- experimental and theoretical analysis of the grounds of site-selective reactivity of complex bifunctional radical cations in condensed phases on the basis of matrix isolation EPR, ENDOR and IR spectroscopy, and quantum-chemical calculations;
- comparative investigations of the reactions of selected radical cations in solid and liquid phases using pulse radiolysis and magnetic-sensitive techniques;
- designing new photopolymerisable systems involving radical cations as key primary intermediates;
- chemical design and practical test of the systems, which could work as logical units in model quantum computations based on optically detected EPR (OD EPR) of radical ion pairs.

The proposed research programme exploits unique joint potential of the present consortium and makes use of original experimental approaches and techniques developed by the project participants, namely:
- combined EPR/IR matrix isolation approach as applied to the studies of structure and reactions of organic radical cations (Moscow-1 team CR2);
- using ENDOR an ESEM techniques for detailed characterisation of the radical cations and products of their reactions (Linkoping team CO);
- a quantitative approach to the kinetic studies of the photoinduced transformations of radical cations in solid matrices (Moscow-2 team CR3);
- application of pulse radiolysis and laser photolysis to kinetic studies of aliphatic radical cations in liquids and solids (Leipzig team CR1);
- using a family of magnetic sensitive techniques (MARY-spectroscopy, fluorescence quantum beats, OD EPR) for studies of the structure and dynamics of the radical cations in liquid phase and for possible realization of quantum logical operations (Novosibirsk team CR4).

Experimental investigations will be complemented with extensive up-to-date level quantum chemical calculations on the specific reactivity of radical cations. Realization of specific tasks will imply direct collaboration of different teams. It is expected that the results obtained will bring new knowledge significant for several areas (radiation chemistry, radiobiology, photochemistry, quantum chemistry, basic physical organic chemistry and theory of reactivity, polymerisation and polymer chemistry, novel information technologies).

The results will be presented in the form of scientific papers and disseminated at major international conferences on different project-related areas chemistry, photochemistry, matrix isolation, quantum chemistry, polymer science in order to make them available to a wider scientific community. When possible, the papers will be prepared jointly with contributions from different teams.

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Programa(s)

• IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993-

Tema(s)

• 3 - Chemistry
• OPEN - OPEN Call

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

Datos no disponibles

Coordinador

University of Linkoping

• Aportación de la UE: Sin datos
• Dirección: 581 83 Linköping ; Suecia
• Coste total: Sin datos

Participantes (4)

Institut für Oberflachenmodifizierung

Alemania

• Aportación de la UE: Sin datos
• Dirección: Permoserstrasse 15 ; 04303 Leipzig
• Coste total: Sin datos

M.V. Lomonosov Moscow State University

Rusia

• Aportación de la UE: Sin datos
• Dirección: Vorbjevy Gory ; 119899 Moscow
• Coste total: Sin datos

Russian Academy of Sciences

Rusia

• Aportación de la UE: Sin datos
• Dirección: Profsoyuznaya Str. 70 ; 117393 Moscow
• Coste total: Sin datos

Siberian Branch of Russian Academy of Sciences

Rusia

• Aportación de la UE: Sin datos
• Dirección: Institutskaja Street 3 ; 630090 Novosibirsk
• Coste total: Sin datos