Details of Grant 

EPSRC Reference:	GR/H71826/01
Title:	OPTICAL SPECTROSCOPY OF CONJUGATED POLYMERS AT HIGH PRESSURE
Principal Investigator:	Holmes, Professor AB
Other Investigators:	Bradley, Professor DD Friend, Professor Sir R
Researcher Co-Investigators:
Project Partners:
Department:	Chemistry
Organisation:	University of Cambridge
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 1992	Ends:	31 March 1995	Value (£):	71,653
EPSRC Research Topic Classifications:	Materials Characterisation
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:
Summary on Grant Application Form
This is a collaborative project between the Departments of Chemistry and Physics in Cambridge and of Physics in Leeds to develop improved routes to poly(arylenevinylene) conjugated polymers, to process these polymers to their most ordered form, to characterise them and to study the relationship between structural order and electronic properties. Measurements in Leeds will be of the high pressure optical properties. Synthetic routes to gain improved structural order will involve the use of stiffer linkages in the precursor polymer. This will be achieved by base-induced partial elimination of leaving groups in the precursor polymers. In the Cavendish work will involve an effort to improve processing of the precursor polymers which are subsequently converted to their conjugated form by thermal/acid treatment. In particular we will study the improvement of order that can be achieved by forming the polymer film on aligned PTFE films. These films will be characterised by x-ray and electron diffraction, to obtain information about orientation, crystallite size, nature of disorder, unit cell parameters. Measurements of optical properties under pressure will be made in Leeds using opposed diamond anvil pressure cells, to follow the variation with pressure of photoluminescence, absorption and Raman scattering. The relationship between luminescence efficiency and band-gap will be especially studied.
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Organisation Website:	http://www.cam.ac.uk