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Proceedings Paper

Materials for near-IR light modulation
Author(s): Alexander M. Whyte; Neil Robertson
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Paper Abstract

The work reported outlines the synthesis, film formation and application of NIR-absorbing metal dithiolene and metal diimine molecules suitable for film formation with varying ligands and central metals. Formation of an electroactive film on conducting glass or mesoporous TiO2 support can be achieved through electropolymerisation, electrodeposition, spin/drop coating or chemical attachment. In this context, we will outline the synthesis, characterisation and properties of a new family of NIR-absorbing aromatic metal diimine complexes. These complexes are shown to give rise to planar, delocalised structures with small HOMO-LUMO gaps, through the use of extended non-innocent ligands o-semibenzoquinonediimines. Herein we report the synthesis of a series of metal diimine complexes, modified to extend the electronic conjugation and shift the intense low-energy absorption from the visible to the NIR region. This study extends the range of available NIR absorping metal-complex chromophores and opens up new possibilities for wavelength tuning and application.

Paper Details

Date Published: 24 October 2016
PDF: 10 pages
Proc. SPIE 9994, Optical Materials and Biomaterials in Security and Defence Systems Technology XIII, 999404 (24 October 2016); doi: 10.1117/12.2241738
Show Author Affiliations
Alexander M. Whyte, The Univ. of Edinburgh (United Kingdom)
Neil Robertson, The Univ. of Edinburgh (United Kingdom)

Published in SPIE Proceedings Vol. 9994:
Optical Materials and Biomaterials in Security and Defence Systems Technology XIII
Roberto Zamboni; François Kajzar; Attila A. Szep; Katarzyna Matczyszyn, Editor(s)

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