Skip to content

Research at St Andrews

Unprecedented strongly panchromic absorption from proton switchable iridium(III) azoimidazolate complexes

Research output: Contribution to journalArticle

Author(s)

Adam Francis Henwood, Yue Hu, Muhammad Tariq Sajjad, Venkata Visveswara Gopala Krishna Thalluri, Sanjay Sanatan Ghosh, David Bradford Cordes, Alexandra Martha Zoya Slawin, Ifor David William Samuel, Neil Robertson, Eli Zysman-Colman

School/Research organisations

Abstract

Two novel heteroleptic iridium(III) complexes bearing an aryldiazoimidazole ligand are reported. These complexes differ structurally with respect to the protonation state of the imidazole ring, but can be independently accessed by varying the synthetic conditions. Their structures have been unequivocally confirmed by X-ray crystal structure analysis, with surprising differences in the structural parameters of the two complexes. The strongly absorbing nature of the free diazoimidazole ligand is enhanced in these iridium complexes, with the protonated cationic complex demonstrating extraordinarily strong panchromic absorption up to 700 nm. The absorption profile of the deprotonated neutral complex is blue-shifted by about 100 nm and thus the interconversion between the two complexes as a function of the acidity/basicity of the environment can be readily monitored by absorption spectroscopy. Theoretical calculations reveal the origins of these markedly different absorption properties. Finally, the protonated analogue has been targeted as an acceptor material for organic photovoltaic (OPV) applications and preliminary results are reported.
Close

Details

Original languageEnglish
Pages (from-to)19128-19135
Number of pages9
JournalChemistry - A European Journal
Volume21
Issue number52
Early online date16 Nov 2015
DOIs
Publication statusPublished - Dec 2015

    Research areas

  • Iridium, OPV, Dye, Panchromic diazo ligand

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Exciton efficiency beyond the spin statistical limit in organic light emitting diodes based on anthracene derivatives

    Sharma, N., Wong, M. Y., Hall, D., Spuling, E., Tenopala Carmona, F., Privitera, A., Copley, G. J., Cordes, D. B., Slawin, A. M. Z., Murawski, C., Gather, M. C., Beljonne, D., Olivier, Y., Samuel, I. D. W. & Zysman-Colman, E., 28 Jan 2020, In : Journal of Materials Chemistry C. In press

    Research output: Contribution to journalArticle

  2. Improving processability and efficiency of Resonant TADF emitters: a design strategy

    Hall, D., Madayanad Suresh, S., dos Santos, P. L., Duda, E., Bagnich, S., Pershin, A., Pachai Gounder, R., Cordes, D. B., Slawin, A. M. Z., Belijonne, D., Köhler, A., Samuel, I. D. W., Olivier, Y. & Zysman-Colman, E., 3 Dec 2019, In : Advanced Optical Materials. Early View, 1901627.

    Research output: Contribution to journalArticle

Related by journal

  1. Chemistry - A European Journal (Journal)

    Stuart John Conway (Editor)
    2007 → …

    Activity: Publication peer-review and editorial work typesEditor of research journal

Related by journal

  1. A density functional theory study of Pd aggregation on a pyridine-terminated self-assembled monolayer

    Yao, Z., Buck, M. & Buehl, M., 15 May 2020, (Accepted/In press) In : Chemistry - A European Journal. In press

    Research output: Contribution to journalArticle

  2. A mechanistically and operationally simple route to metal-N-heterocyclic carbene (NHC) Complexes

    Nolan, S. P., Tzouras, N., Nahra, F., Falivene, L., Cavallo, L., Saab, M., Van Hecke, K., Collado, A., Collett, C., Smith, A. D. & Cazin, C. S. J., 12 Mar 2020, In : Chemistry - A European Journal. Early View

    Research output: Contribution to journalArticle

  3. Copper-mediated conversion of complex ethers to esters: enabling biopolymer depolymerisation under mild conditions

    Westwood, N. J., Xiao, G., Montgomery, J., Lancefield, C. S. & Panovic, I., 21 Apr 2020, (Accepted/In press) In : Chemistry - A European Journal. In press

    Research output: Contribution to journalArticle

  4. The role of chemists and chemical engineers in a sustainable world

    Cole-Hamilton, D. J., 11 Feb 2020, In : Chemistry - A European Journal. 26, 9, p. 1894-1899

    Research output: Contribution to journalArticle

ID: 225045876

Top