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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.
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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.
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Güngördü Solğun D, Yildiko Ü, Ağirtaş MS. Synthesis, photophysical, photochemical, and DFT properties of a zinc phthalocyanine with 2-(2-isopropyl-5-methylphenoxy)phenoxy peripheral groups. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2090245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Derya Güngördü Solğun
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, 65080, Turkey
| | - Ümit Yildiko
- Architecture and Engineering Faculty, Department of Bioengineering, Kafkas University, Kars, Turkey
| | - Mehmet Salih Ağirtaş
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, 65080, Turkey
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Cabir B, Yildiko U, Ağırtaş MS, Horoz S. Computational DFT calculations, photovoltaic properties and synthesis of (2R, 3S)-2, 3, 4-trihydroxybutoxy substituted phthalocyanines. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1725051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Beyza Cabir
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, Turkey
| | - Umit Yildiko
- Architecture and Engineering Faculty, Department of Bioengineering, Kafkas University, Kars, Turkey
| | - Mehmet Salih Ağırtaş
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, Turkey
| | - Sabit Horoz
- Faculty of Engineering and Architecture Department of Electrical and Electronic Engineering, Siirt University, Siirt, Turkey
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DFT analysis and electronic properties, and synthesis of tetra (9-phenyl-9H-xanthen-9-yl) oxy peripheral-substituted zinc phthalocyanine. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01087-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Kuznetsov AE. Phthalocyanines core-modified by P and S and their complexes with fullerene C60: DFT study. PHYSICAL SCIENCES REVIEWS 2019. [DOI: 10.1515/psr-2019-0001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Abstract
Phthalocyanines (Pcs) and their derivatives have attracted a lot of attention because of their both biological importance and technological applications. The properties of Pcs can be tuned by replacing the central atom, by modifying the periphery of phthalocyanine ring, and by changing the meso-atoms. One more promising pathway for modifying Pcs and their derivatives can be the core-modification, or substitution of the core isoindole nitrogen(s) by other elements. Motivated by the results obtained for some core-modified porphyrins, we investigated computationally complete core-modification of regular Zn phthalocyanine (ZnPc) with P and S. We performed density functional theory studies of the structures, charges, and frontier molecular orbitals of P-core-modified and S-core-modified ZnPcs, ZnPc(P)4 and ZnPc(S)4, using both B3LYP and two dispersion-corrected functionals. Also, we studied computationally formation of complexes between the fullerene C60 and ZnPc(P)4 and ZnPc(S)4. Both ZnPc(P)4 and ZnPc(S)4 show strong bowl-like distortions similar to the results obtained earlier for ZnP(P)4 and ZnP(S)4. The size of the “bowl” cavity of the both core-modified Pcs is essentially the same, showing no dependence on the core-modifying element. For ZnPc(S)4, the HOMO is quite different from those of ZnPc and ZnPc(P)4. When the fullerene C60 forms complexes with the ZnPc(P)4 and ZnPc(S)4 species in the gas phase, it is located relatively far (4.30–5.72 Å) from the one of the P-centers and from the Zn-center of ZnPc(P)4, whereas with ZnPc(S)4 C60 forms relatively short bonds with the Zn-center, varying from ca. 2.0 to ca. 3.0 Å. The very strong deformations of both the ZnPc(P)4 and ZnPc(S)4 structures are observed. The calculated binding energy at the B3LYP/6-31G* level for the C60-ZnPc(P)4 complex is quite low, 1.2 kcal/mol, which agrees with the quite long distances fullerene - ZnPc(P)4, whereas it is noticeably larger, 13.6 kcal/mol, for the C60-ZnPc(S)4 complex which again agrees with the structural features of this complex. The binding energies of the complexes optimized using the dispersion-corrected functionals, CAM-B3LYP and wB97XD, are significantly larger, varying from ca. 14 till 52 kcal/mol which corresponds with the shorter distances between the fullerene and ZnPc(X)4 species.
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Cabir B, Yildiko U, Ağirtaş MS. Synthesis, DFT analysis, and electronic properties of new phthalocyanines bearing ETAEO substituents on peripheral position. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1680832] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Beyza Cabir
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, Turkey
| | - Umit Yildiko
- Architecture and Engineering Faculty, Department of Bioengineering, Kafkas University, Kars, Turkey
| | - Mehmet Salih Ağirtaş
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yıl University, Van, Turkey
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