1
|
Tkachenko N, Golovanov V, Penni A, Vesamäki S, Ajayakumar MR, Muranaka A, Kobayashi N, Efimov A. The windmill, the dragon, and the frog: geometry control over the spectral, magnetic, and electrochemical properties of cobalt phthalocyanine regioisomers. Phys Chem Chem Phys 2024; 26:18113-18128. [PMID: 38895861 DOI: 10.1039/d4cp01564a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
For the first time, we have prepared non-aggregating phthalocyanine cobalt complexes as a set of resolved positional isomers. These compounds comprise a unique test bed for the structure-properties studies, as their optical and electrochemical properties are influenced by the planarity of the phthalocyanine macrocycle, which can be controlled by the positional isomerism of the bulky aromatic substituents at the α-phthalo sites. We support our conclusions with molecular modelling studies, which show a perfect match between the calculated and experimentally determined spectral/electrochemical values. We challenge a common perception that the NMR spectra of cobalt phthalocyanines cannot be measured due to the paramagnetic nature of Co(II). We suggest instead that the key factors affecting the NMR spectral resolution are molecular aggregation and π-π stacking. These interactions are suppressed by the bulky peripheral substituents on the cobalt phthalocyanines prepared, making these isomeric compounds an excellent tool for paramagnetic NMR studies.
Collapse
Affiliation(s)
| | - Viacheslav Golovanov
- Tampere University, Korkeakoulunkatu 10, 33720 Tampere, Finland.
- South-Ukrainian National University, Staroportofrankovskaya str. 26, 65020, Odessa, Ukraine
| | - Aleksandr Penni
- Tampere University, Korkeakoulunkatu 10, 33720 Tampere, Finland.
| | - Sami Vesamäki
- Tampere University, Korkeakoulunkatu 10, 33720 Tampere, Finland.
| | - M R Ajayakumar
- Tampere University, Korkeakoulunkatu 10, 33720 Tampere, Finland.
| | - Atsuya Muranaka
- Molecular Structure Characterization Unit, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Ueda 386-8567, Japan
| | - Alexander Efimov
- Tampere University, Korkeakoulunkatu 10, 33720 Tampere, Finland.
| |
Collapse
|
2
|
Zhao Y, An F, Meng J, Zhu Y, Sun X, Zhang X, Sun X. Nickel Phthalocyanines as Potential Aggregation‐Induced Antibacterial Agents: Fenton‐Like Pathways Driven by Near‐Infrared Light. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yue Zhao
- State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China
| | - Fuhao An
- School of Chemistry and Chemical Engineering Shandong University 250100 Jinan China
| | - Jiao Meng
- State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China
| | - Yuxin Zhu
- State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China
| | - Xun Sun
- State Key Laboratory of Crystal Materials Shandong University 250100 Jinan China
| | - Xiaomei Zhang
- School of Chemistry and Chemical Engineering Shandong University 250100 Jinan China
| | - Xuan Sun
- School of Chemistry and Chemical Engineering Shandong University 250100 Jinan China
| |
Collapse
|
3
|
Okada Y, Hoshi T, Kobayashi N. Recent Progress in Optically-Active Phthalocyanines and Their Related Azamacrocycles. Front Chem 2020; 8:595998. [PMID: 33195104 PMCID: PMC7604507 DOI: 10.3389/fchem.2020.595998] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 09/28/2020] [Indexed: 11/13/2022] Open
Abstract
Optically-active phthalocyanines (Pcs) and related macrocycles reported in the 2010-2020 period are introduced in this review. They are grouped into several categories: (1) chiral binaphthyl-containing Pcs, (2) optically active alkyl chain-containing Pcs, (3) chiral axial ligand- coordinated or -linked Pcs, (4) chiral subphthalocyanines (SubPcs), and (5) related azamacrocycles. For each compound, the structure and important characteristics are summarized.
Collapse
Affiliation(s)
- Yusuke Okada
- Faculty of Textile Science and Technology, Shinshu University, Ueda, Japan
| | - Tomonori Hoshi
- Clinical Research, Innovation and Education Center, Tohoku University Hospital, Sendai, Japan
| | - Nagao Kobayashi
- Faculty of Textile Science and Technology, Shinshu University, Ueda, Japan
| |
Collapse
|
4
|
Bächle F, Maichle-Mössmer C, Ziegler T. Helical Self-Assembly of Optically Active Glycoconjugated Phthalocyanine J-Aggregates. Chempluschem 2020; 84:1081-1093. [PMID: 31943966 DOI: 10.1002/cplu.201900381] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/18/2019] [Indexed: 01/26/2023]
Abstract
Four galactoconjugated zinc(II) phthalocyanines (Pcs) have been prepared and fully characterized. The carbohydrate-containing phthalonitrile precursors of the Pcs were synthesized through a copper-catalysed azide-alkyne cycloaddition (CuAAC). The Pcs show a remarkable aggregation behaviour in solution, depending on the nature of the solvent, the temperature and the substitution position on the phthalocyanine. Solvent-dependent CD-spectroscopy experiments show that these Pcs aggregate as chiral helices in solution. Crystal structure data of a phthalocyanine bearing two carbohydrate units substantiate the properties shown by CD spectroscopy. Furthermore, the 1,2,3-triazole moieties of the Pcs play a decisive role in the formation of supramolecular aggregates. The glycoconjugated zinc(II) phthalocyanines described here show molar extinction coefficients ϵmax >105 M-1 cm-1 and absorption maxima λmax >680 nm, which make them attractive photosensitizers for Photodynamic Therapy (PDT).
Collapse
Affiliation(s)
- Felix Bächle
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| |
Collapse
|