Materials for near-IR light modulation

Alexander M. Whyte; Neil Robertson

doi:10.1117/12.2241738

24 October 2016 Materials for near-IR light modulation

Alexander M. Whyte, Neil Robertson

Proceedings Volume 9994, Optical Materials and Biomaterials in Security and Defence Systems Technology XIII; 999404 (2016) https://doi.org/10.1117/12.2241738
Event: SPIE Security + Defence, 2016, Edinburgh, United Kingdom

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.

Conference Presentation

Citation Download Citation

Alexander M. Whyte and Neil Robertson "Materials for near-IR light modulation", Proc. SPIE 9994, Optical Materials and Biomaterials in Security and Defence Systems Technology XIII, 999404 (24 October 2016); https://doi.org/10.1117/12.2241738

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