Wavelength‐dependent control of the CO release kinetics of manganese(I) tricarbonyl PhotoCORMs with benzimidazole coligands
Please always quote using this URN: urn:nbn:de:bvb:20-opus-218362
- A series of photoactivatable CO‐releasing molecules (PhotoCORMs) was prepared from manganese pentacarbonyl bromide and 1H‐benzimidazol‐2‐ylmethyl‐(N‐phenyl)amine ligands (L) bearing different electron‐donating and electron‐withdrawing groups R = H, 4‐CH\(_3\), 4‐OCH\(_3\), 4‐Cl, 4‐NO\(_2\), 2‐, 3‐, and 4‐COOCH\(_3\) on the phenyl substituent to give octahedral manganese(I) complexes of the general formula [MnBr(CO)\(_3\)(L)]. Aerated DMSO solutions of the compounds are stable in the dark for 16 h with no CO release. However, the compoundsA series of photoactivatable CO‐releasing molecules (PhotoCORMs) was prepared from manganese pentacarbonyl bromide and 1H‐benzimidazol‐2‐ylmethyl‐(N‐phenyl)amine ligands (L) bearing different electron‐donating and electron‐withdrawing groups R = H, 4‐CH\(_3\), 4‐OCH\(_3\), 4‐Cl, 4‐NO\(_2\), 2‐, 3‐, and 4‐COOCH\(_3\) on the phenyl substituent to give octahedral manganese(I) complexes of the general formula [MnBr(CO)\(_3\)(L)]. Aerated DMSO solutions of the compounds are stable in the dark for 16 h with no CO release. However, the compounds rapidly release CO upon illumination at 412–525 nm, depending on the substitution pattern. Its influence on the photophysical and photochemical properties was systematically explored using UV/Vis spectroscopy and CO release measurements with a commercial gas sensor system. In the nitro‐substituted compound, the electronically excited state switched from benzimidazole‐ to phenyl‐centered, leading to a markedly different photochemical behavior of this visible‐light activated PhotoCORM.…
Author: | Ahmed M. Mansour, Christoph Steiger, Christoph Nagel, Ulrich Schatzschneider |
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URN: | urn:nbn:de:bvb:20-opus-218362 |
Document Type: | Journal article |
Faculties: | Fakultät für Chemie und Pharmazie / Institut für Anorganische Chemie |
Fakultät für Chemie und Pharmazie / Institut für Pharmazie und Lebensmittelchemie | |
Language: | English |
Parent Title (English): | European Journal of Inorganic Chemistry |
Year of Completion: | 2019 |
Volume: | 2019 |
Issue: | 42 |
Pagenumber: | 4572-4581 |
Source: | European Journal of Inorganic Chemistry, 2019: 4572-4581. https://doi.org/10.1002/ejic.201900894 |
DOI: | https://doi.org/10.1002/ejic.201900894 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 546 Anorganische Chemie |
Tag: | Benzimidazole; CO‐releasing molecules (CORMs); Manganese Carbonyl ligands; TDDFT |
Release Date: | 2020/12/08 |
Date of first Publication: | 2019/11/11 |
Licence (German): | CC BY-NC: Creative-Commons-Lizenz: Namensnennung, Nicht kommerziell 4.0 International |