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Kiseleva MA, Churakov AV, Taydakov IV, Metlin MT, Kozyukhin SA, Bezzubov SI. Aggregation-induced emission of cyclometalated rhodium(III) and iridium(III) phenylpyridine complexes with ancillary 1,3-diketones. Dalton Trans 2023; 52:17861-17872. [PMID: 37975537 DOI: 10.1039/d3dt02651e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
A joint structural and spectroscopic study of simple bis-cyclometataled rhodium(III) and iridium(III) complexes with 2-phenylpyridine and aromatic β-diketones (dibenzoylmethane, benzoylacetone, benzoyltrifluoroacetone, and 2-thenoyltrifluoroacetone) reveals an interplay between the solid-state emission efficiency and crystal packing peculiarities of the complexes. Although the prepared rhodium(III) cyclometalates are isostructural with iridium(III) analogues, different types of π-π interactions are responsible for the aggregation-induced emission (AIE) of the complexes depending on the metal ion. For iridium(III) complexes, pyridyl-pyridyl contacts are essential for AIE because they lower the energy of the emissive metal-to-ligand charge transfer state below that of the non-emissive state located at the ancillary ligand. Enabled by phenyl-pyridyl interactions partially blocking the population of non-emissive d-d states, solid-state phosphorescence enhancement is successfully achieved in a rhodium(III) complex with ancillary benzoyltrifluoroacetone, which is the first example of a rhodium complex exhibiting AIE.
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Affiliation(s)
- Marina A Kiseleva
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
- Department of Chemistry, Lomonosov Moscow State University, Lenin's Hills 1, Moscow, 119991, Russia
| | - Andrei V Churakov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Ilya V Taydakov
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
| | - Mikhail T Metlin
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
- Bauman Moscow State Technical University, 2-ya Baumanskaya Str. 5/1, Moscow, 105005, Russia
| | - Sergey A Kozyukhin
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Stanislav I Bezzubov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
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Graf M, Böttcher HC, Czerwieniec R, Mayer P, Thavalingam S, Metzler-Nolte N. Photophysical and structural characterization of the bis-cyclometalated compound [Ir(ptpy)2(κ2N-tppz)]PF6 and evaluation of its cytotoxic activity. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Cytotoxic Activities of Bis‐cyclometalated Rhodium(III) and Iridium(III) Complexes Containing 2,2’‐Biphenyldiamine. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Graf M, Böttcher H, Sünkel K, Thavalingam S, Metzler‐Nolte N, Czerwieniec R. Bis‐cyclometalated Iridium Complexes Containing Modified Phenanthroline Ligands and Evaluation of their Cytotoxic Activities. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Marion Graf
- Department Chemie Ludwig‐Maximilians‐Universität Butenandtstrasse 5–13 (D) 81377 München Germany
| | - Hans‐Christian Böttcher
- Department Chemie Ludwig‐Maximilians‐Universität Butenandtstrasse 5–13 (D) 81377 München Germany
| | - Karlheinz Sünkel
- Department Chemie Ludwig‐Maximilians‐Universität Butenandtstrasse 5–13 (D) 81377 München Germany
| | - Sugina Thavalingam
- Faculty for Chemistry and Biochemistry Chair of Inorganic Chemistry I Bioinorganic Chemistry Ruhr University Bochum Universitätsstrasse 150 44801 Bochum Germany
| | - Nils Metzler‐Nolte
- Faculty for Chemistry and Biochemistry Chair of Inorganic Chemistry I Bioinorganic Chemistry Ruhr University Bochum Universitätsstrasse 150 44801 Bochum Germany
| | - Rafał Czerwieniec
- Institute of Physical and Theoretical Chemistry University Regensburg Universitätsstrasse 31 93053 Regensburg Germany
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