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Hattori S, Ogishima M, Nakajima T, Hosoya S, Kitagawa Y, Hasegawa Y, Nonose S, Sato T, Shinozaki K. Photodynamic Effect of Amphiphilic N ∧C ∧N-Coordinated Platinum(II) Complexes in Human Umbilical Vein Endothelial Cells. Inorg Chem 2024. [PMID: 38996005 DOI: 10.1021/acs.inorgchem.4c01414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
Here, we report a photodynamic therapy (PDT) photosensitizer of N∧C∧N-coordinated Pt(II) complexes: [Pt(L)(solv)]+ (HL = 1,3-(2-dipyridyl)benzene) and [Pt(L)]+@HSA, which is the Pt(II) complex encapsulated in human serum albumin (HSA). The quantum yield of singlet oxygen production for [Pt(L)(solv)]+ is more than 50%, while that for [Pt(L)]+@HSA is much lower. Photoimages of human umbilical vein endothelial cells (HUVECs) treated with the Pt(II) complexes suggest that [Pt(L)(solv)]+ is delocalized in the entire cell after the fast uptake by diffusion and [Pt(L)]+@HSA is taken up by endocytosis and localized on organelles and the cell membrane. [Pt(L)(solv)]+ shows high photocytotoxicity for HUVECs, while [Pt(L)]+@HSA does not show photocytotoxicity.
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Affiliation(s)
- Shingo Hattori
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Mizuki Ogishima
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tadaaki Nakajima
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Shota Hosoya
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yuichi Kitagawa
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, Kita 13 Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Shinji Nonose
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Tomomi Sato
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
| | - Kazuteru Shinozaki
- Graduate School of Nanobioscience, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama 236-0027, Japan
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2
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Abramov VM, Tokhtueva MD, Melekhin VV, Eltsov OS. Acetonyl C^N^N platinum(II) complexes of arylbipyridines. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2024. [PMID: 38982634 DOI: 10.1002/mrc.5475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 06/21/2024] [Accepted: 06/25/2024] [Indexed: 07/11/2024]
Abstract
This paper presents the first example of the formation of acetonyl tridentate CˆNˆN complexes of arylbipyridines in the reaction of chloroplatinum complexes with acetone in the presence of alkali. The chemical structure of obtained substances was established by means of 1H,13C NMR, COSY, HSQC, and HMBC techniques. The attribution of all proton and carbon signals in NMR spectra was performed using 1D and 2D NMR experiments for the synthesized acetonyl cycloplatinated complexes. A comparative analysis of the values of the C-Pt spin-spin coupling constants of the same order was carried out, which showed a significant difference in bond lengths and valence angles inthe cyclic fragments of the arylbipyridine ligand.
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Affiliation(s)
- Vladislav M Abramov
- Chemical Technology Institute, Ural Federal University, Yekaterinburg, Russian Federation
| | - Maria D Tokhtueva
- Chemical Technology Institute, Ural Federal University, Yekaterinburg, Russian Federation
| | - Vsevolod V Melekhin
- Chemical Technology Institute, Ural Federal University, Yekaterinburg, Russian Federation
| | - Oleg S Eltsov
- Chemical Technology Institute, Ural Federal University, Yekaterinburg, Russian Federation
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3
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Watanabe H, Iwamura M, Nozaki K. Kinetic Analysis of Excited-State Dynamics of Emissive Oligomers of Pt(II) Complex in Solution. Inorg Chem 2024; 63:5580-5585. [PMID: 38477493 DOI: 10.1021/acs.inorgchem.3c04542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2024]
Abstract
[Pt(NCN)MeCN]+ (NCN = 1,3-di(2-pyridyl)benzene, MeCN = acetonitrile) forms oligomers, such as dimers and trimers, in solutions due to metallophilic interactions. The emission and absorption spectra in the visible region are considerably changed by the concentrations of the solutions because the excitation energy of the oligomers is dependent on the degree of oligomerization. In this study, excited-state dynamics of [Pt(NCN)MeCN]+ in acetonitrile were investigated by time-resolved emission spectroscopy in time regions from microseconds to nanoseconds at various concentrations. The time-resolved emission spectra recorded with 355 nm photoexcitation showed the decay of the blue-green emission and the rise of the red emission in the microsecond time region. Stern-Volmer analysis of the time-resolved data at various concentrations and wavelengths provides two bimolecular rate constants (4.1 × 109 and 8.2 × 108 M-1 s-1) for the formation processes of the excited-state T1 dimer and T1 trimer, respectively. Kinetic parameters, such as the intrinsic decay rate constants of the T1 monomer, T1 dimer, and T1 trimer, and the association and dissociation rate constants of the T1 dimer and T1 trimer were estimated by fitting the time-resolved emission data at various concentrations.
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Affiliation(s)
- Honoka Watanabe
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Munetaka Iwamura
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Koichi Nozaki
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
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Khistiaeva VV, Buss S, Eskelinen T, Hirva P, Kinnunen N, Friedel J, Kletsch L, Klein A, Strassert CA, Koshevoy IO. Cyanido-bridged diplatinum(ii) complexes: ligand and solvent effect on aggregation and luminescence. Chem Sci 2024; 15:4005-4018. [PMID: 38487239 PMCID: PMC10935663 DOI: 10.1039/d3sc06941a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 01/23/2024] [Indexed: 03/17/2024] Open
Abstract
The association of platinum(ii)-based luminophores, which is caused by metal⋯metal and π-π stacking interactions, has been actively exploited in supramolecular construction of photofunctional molecular materials. Herein, we describe a series of bimetallic complexes [{Pt(C^N^/*N)}2(CN)][BAr4F], containing cyanido-bridged cyclometalated Pt(ii) chromophore fragments (HC^N^N = 6-phenyl-2,2'-bipyridine, (benzyltriazolyl)-phenylpyridine, and pyrazolyl-phenylpyridine; HC^N*N = N-pentyl-6-phenyl-N-(pyridin-2-yl)pyridin-2-amine; ^/* denote five/six-membered metallocycles). These compounds are intensely phosphorescent at room temperature showing quantum yields up to 0.73 in solution and 0.62 in the solid state, which are generally higher than those of the mononuclear relatives [Pt(C^N^/*N)(CN)]. The complex cations bearing sterically unhindered -C^N^N ligands readily assemble in solution, reaching the tetrameric species [{Pt(C^N^N)}2(CN)]44+ as suggested by diffusion NMR spectroscopy. The size of the aggregates can be regulated by the concentration, temperature, and polarity of the solvent that allows to alter the emission from green to near-IR. In the solid state, the maximum of low-energy luminescence is shifted up to 912 nm. The results show that photophysical properties of discrete complexes and the intermolecular aggregation can be substantially enhanced by utilizing the rigid bimetallic units giving rise to novel dynamic light emitting Pt(ii) systems.
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Affiliation(s)
- Viktoria V Khistiaeva
- Department of Chemistry, University of Eastern Finland P.O. Box 111 FI-80100 Joensuu Finland
| | - Stefan Buss
- Institut für Anorganische und Analytische Chemie, Universität Münster, CiMIC, CeNTech Heisenbergstraße 11 48149 Münster Germany
| | - Toni Eskelinen
- Department of Chemistry, University of Eastern Finland P.O. Box 111 FI-80100 Joensuu Finland
- Department of Chemistry and Materials Science, Aalto University FI-00076 Aalto Finland
| | - Pipsa Hirva
- Department of Chemistry, University of Eastern Finland P.O. Box 111 FI-80100 Joensuu Finland
| | - Niko Kinnunen
- Department of Chemistry, University of Eastern Finland P.O. Box 111 FI-80100 Joensuu Finland
| | - Joshua Friedel
- Faculty of Mathematics and Natural Sciences, Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Lukas Kletsch
- Faculty of Mathematics and Natural Sciences, Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Axel Klein
- Faculty of Mathematics and Natural Sciences, Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Cristian A Strassert
- Institut für Anorganische und Analytische Chemie, Universität Münster, CiMIC, CeNTech Heisenbergstraße 11 48149 Münster Germany
| | - Igor O Koshevoy
- Department of Chemistry, University of Eastern Finland P.O. Box 111 FI-80100 Joensuu Finland
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Nath J, Baruah JB. E- or Z-Isomers Arising from the Geometries of Ligands in the Mercury Complex of 2-(Anthracen-9-ylmethylene)- N-phenylhydrazine Carbothioamide. ACS OMEGA 2023; 8:42827-42839. [PMID: 38024736 PMCID: PMC10653070 DOI: 10.1021/acsomega.3c05806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/30/2023] [Accepted: 10/11/2023] [Indexed: 12/01/2023]
Abstract
An anionic mercury(II) complex of 2-(anthracen-9-ylmethylene)-N-phenylhydrazine carbothioamide (HATU) and two isomers of a neutral mercury(II) complex of the anion of the same ligand (ATU) were reported. The anionic complex [Hg(HATU)2Cl2]·CH2Cl2 had a monodentate HATU ligand (a neutral form of the ligand) and chloride ligands. The two conformational isomers were of the neutral mercury(II) complex Hg(ATU)2·2DMF. The two isomers were from the E or Z geometry of the ligands across the conjugated C=N-N=C-N scaffold of the coordinated ligand. The two isomers of the complex were independently prepared and characterized. The spectroscopic properties of the isomers in solution were studied by 1H NMR as well as fluorescence spectroscopy. Facile conversion of the E-isomer to the Z-isomer in solution was observed. Density functional theory (DFT) calculations revealed that the Z-isomer of the complex was stable compared to the E-isomer by an energy of 14.35 kJ/mol; whereas, E isomer of the ligand was more stable than Z isomer by 8.37 KJ/mol. The activation barrier for the conversion of the E-isomer to the Z-isomer of the ligand was 167.37 kJ/mol. The role of the mercury ion in the conversion of the E-form to the Z-form was discussed. The mercury complex [Hg(HATU)2Cl2]·CH2Cl2 had the E-form of the ligand. Distinct photophysical features of these mercury complexes were presented.
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Affiliation(s)
- Jitendra Nath
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam India
| | - Jubaraj B. Baruah
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam India
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6
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Martínez-Junquera M, Lalinde E, Moreno MT. cis/ trans-[Pt(C ∧N)(C≡CR)(CNBu t)] Isomers: Synthesis, Photophysical, DFT Studies, and Chemosensory Behavior. Inorg Chem 2023; 62:11849-11868. [PMID: 37458185 PMCID: PMC10394665 DOI: 10.1021/acs.inorgchem.3c01196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/01/2023]
Abstract
cis/trans Isomerism can be a crucial factor for photophysical properties. Here, we report the synthesis and optical properties of a series of trans- and cis-alkynyl/isocyanide cycloplatinated compounds [Pt(C∧N)(C≡CR)(CNBut)] [R = C6H4-4-OMe 1, 3-C4H3S 2; C∧N = 2-(2,4-difluorophenyl)pyridine (dfppy) (a), 4-(2-pyridyl)benzaldehyde (ppy-CHO) (b)]. The trans-forms do not isomerize thermally in MeCN solution to the cis forms, but upon photochemical irradiation in this medium at 298 K, a variable isomerization to the cis forms was observed. This behavior is in good agreement with the theoretically calculated energy values. The trans/cis configuration, the identity of the cyclometalated, and the alkynyl ligand influence on the absorption and emission properties of the complexes in solution, polystyrene (PS) films, and solid state are reported. All complexes are efficient triplet emitters in all media (except for trans-1a and trans-2a in CH2Cl2 solution at 298 K), with emission wavelengths depending mainly on the cyclometalated ligand in the region 473-490 nm (dfppy), 510-550 (ppy-CHO), and quantum yields (ϕ) ranging from 18.5 to 40.7% in PS films. The combined photophysical data and time-dependent density functional theory calculations (TD-DFT) at the excited-state T1 geometry reveal triplet excited states of 3L'LCT (C≡CR → C∧N)/3IL (C∧N) character with minor 3MLCT contribution. The dfppy (a) complexes show a greater tendency to aggregate in rigid media than the ppy-CHO (b) and the cis with respect to the trans, showing red-shifted structureless bands of 3MMLCT and/or excimer-like nature. Interestingly, trans-1a,2a and cis-1a,2a undergo significant changes in the ultraviolet (UV) and emission spectra with Hg2+ ions enabling their use for sensing of Hg2+ ions in solution. This is clearly shown by the hypsochromic shift and substantial decrease of the low-energy absorption band and an increase of the intensity of the emission in the MeCN solution upon the addition of a solution of Hg(ClO4)2 (1:5 molar ratio). Job's plot analysis estimated a 1:1 stoichiometry in the complexation mode of Hg2+ by trans-2a. The binding constant (log K) calculated for this system from absorption titration data resulted to be 2.56, and the limit of the detection (LOD) was 6.54 × 10-7 M.
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Affiliation(s)
- Mónica Martínez-Junquera
- Departamento de Química-Centro de Síntesis Química de La Rioja, (CISQ), Universidad de La Rioja, 26006 Logroño, Spain
| | - Elena Lalinde
- Departamento de Química-Centro de Síntesis Química de La Rioja, (CISQ), Universidad de La Rioja, 26006 Logroño, Spain
| | - M Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja, (CISQ), Universidad de La Rioja, 26006 Logroño, Spain
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7
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Iwamura M, Urayama R, Fukui A, Nozaki K, Liu L, Kuramochi H, Takeuchi S, Tahara T. Spectroscopic mapping of the gold complex oligomers (dimer, trimer, tetramer, and pentamer) by excited-state coherent nuclear wavepacket motion in aqueous solutions. Phys Chem Chem Phys 2023; 25:966-974. [PMID: 36515079 DOI: 10.1039/d2cp04823j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
We investigate the excited-state dynamics of the [Au(CN)2-] oligomers following photo-initiated intermolecular Au-Au bond formation by carrying out femtosecond time-resolved absorption and emission measurements at various concentrations (0.080-0.6 mol dm-3) with different photoexcitation wavelengths (290-340 nm). The temporal profiles of the time-resolved absorption signals exhibit clear oscillations arising from the Au-Au stretch coherent wavepacket motion of the excited-state oligomers, which is initiated with the photo-induced Au-Au bond formation. The frequency of the observed oscillation is changed with the change of the concentration, excitation wavelength, and wavelength of the excited-state absorption monitored, reflecting the change in the size of the oligomers detected. Fourier transforms (FTs) of the oscillations provide 2D plots of the FT amplitude against the oscillation frequency versus the detected wavelengths. Because the FT amplitude exhibits a node at the peak wavelength of the absorption of the species that gives rise to the oscillation, the 2D plots enabled us to determine the peak wavelength of the excited-state absorption of the dimer, trimer, tetramer, and pentamer. We also performed femtosecond time-resolved absorption measurements for the 0.3 mol dm-3 solution with 260 nm photoexcitation, which is the condition employed in previous time-resolved X-ray studies (e.g., K. H. Kim et al. Nature, 2015, 518 (7539), 385-389). It was found that various excited-state oligomers, including the dimer, were simultaneously generated under this condition, although the analysis of the previous time-resolved X-ray studies was made by assuming that only the excited-state trimer was generated. The obtained results show that the excited-state dynamics of the trimer claimed based on the time-resolved X-ray data is questionable and that re-analysis and re-examining of its data are necessary.
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Affiliation(s)
- Munetaka Iwamura
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan.
| | - Rina Urayama
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan.
| | - Airi Fukui
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan.
| | - Koichi Nozaki
- Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan.
| | - Li Liu
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hikaru Kuramochi
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Satoshi Takeuchi
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Tahei Tahara
- Molecular Spectroscopy Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.,Ultrafast Spectroscopy Research Team, RIKEN Center for Advanced Photonics (RAP), RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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8
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Cáceres-Vásquez J, Jara DH, Costamagna J, Martínez-Gómez F, Silva CP, Lemus L, Freire E, Baggio R, Vera C, Guerrero J. Effect of non-covalent self-dimerization on the spectroscopic and electrochemical properties of mixed Cu(i) complexes. RSC Adv 2023; 13:825-838. [PMID: 36686905 PMCID: PMC9810106 DOI: 10.1039/d2ra05341a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 12/06/2022] [Indexed: 01/05/2023] Open
Abstract
A series of six new Cu(i) complexes with ([Cu(N-{4-R}pyridine-2-yl-methanimine)(PPh3)Br]) formulation, where R corresponds to a donor or acceptor p-substituent, have been synthesized and were used to study self-association effects on their structural and electrochemical properties. X-ray diffraction results showed that in all complexes the packing is organized from a dimer generated by supramolecular π stacking and hydrogen bonding. 1H-NMR experiments at several concentrations showed that all complexes undergo a fast-self-association monomer-dimer equilibrium in solution, while changes in resonance frequency towards the high or low field in specific protons of the imine ligand allow establishing that dimers have similar structures to those found in the crystal. The thermodynamic parameters for this self-association process were calculated from dimerization constants determined by VT-1H-NMR experiments for several concentrations at different temperatures. The values for K D (4.0 to 70.0 M-1 range), ΔH (-1.4 to -2.6 kcal mol-1 range), ΔS (-0.2 to 2.1 cal mol-1 K-1 range), and ΔG 298 (-0.8 to -2.0 kcal mol-1 range) are of the same order and indicate that the self-dimerization process is enthalpically driven for all complexes. The electrochemical profile of the complexes shows two redox Cu(ii)/Cu(i) processes whose relative intensities are sensitive to concentration changes, indicating that both species are in chemical equilibrium, with the monomer and the dimer having different electrochemical characteristics. We associate this behaviour with the structural lability of the Cu(i) centre that allows the monomeric molecules to reorder conformationally to achieve a more adequate assembly in the non-covalent dimer. As expected, structural properties in the solid and in solution, as well as their electrochemical properties, are not correlated with the electronic parameters usually used to evaluate R substituent effects. This confirms that the properties of the Cu(i) complexes are usually more influenced by steric effects than by the inductive effects of substituents of the ligands. In fact, the results obtained showed the importance of non-covalent intermolecular interactions in the structuring of the coordination geometry around the Cu centre and in the coordinative stability to avoid dissociative equilibria.
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Affiliation(s)
- Joaquín Cáceres-Vásquez
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Danilo H. Jara
- Facultad de Ingenieria y Ciencias, Universidad Adolfo IbáñezAv. Padre Hurtado 750Viña del MarChile
| | - Juan Costamagna
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile,Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Fabián Martínez-Gómez
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile,Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Carlos P. Silva
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Luis Lemus
- Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Eleonora Freire
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaAvenida Gral. Paz 1499, 1650, San MartínBuenos AiresArgentina,Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Argentina and Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaBuenos AiresArgentina,Member of CONICETArgentina
| | - Ricardo Baggio
- Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía AtómicaAvenida Gral. Paz 1499, 1650, San MartínBuenos AiresArgentina
| | - Cristian Vera
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
| | - Juan Guerrero
- Laboratorio de Compuestos de Coordinación y Química Supramolecular, Facultad de Química y Biología, Universidad de Santiago de ChileAv. Libertador Bernardo O'Higgins 3363, Estación Central, Casilla 40, Correo 33SantiagoChile
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9
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Li B, Wang Y, Chan MH, Pan M, Li Y, Yam VW. Supramolecular Assembly of Organoplatinum(II) Complexes for Subcellular Distribution and Cell Viability Monitoring with Differentiated Imaging. Angew Chem Int Ed Engl 2022; 61:e202210703. [DOI: 10.1002/anie.202210703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Baoning Li
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
| | - Yaping Wang
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Michael Ho‐Yeung Chan
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
| | - Mei Pan
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Yonguang Li
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Vivian Wing‐Wah Yam
- Lehn Institute of Functional Materials School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
- State Key Laboratory of Synthetic Chemistry Institute of Molecular Functional Materials and Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong 999077 P. R. China
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10
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Zhang RY, Cui MH, Wang WW, Li WL, Zhao JP, Liu FC. Dicarboxylate Modulating Molecular-Ionic Platinum Compounds with Variable Stacking and Photoluminescence. Inorg Chem 2022; 61:1997-2009. [PMID: 35029375 DOI: 10.1021/acs.inorgchem.1c03146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Under solvothermal conditions, 10 molecular-ionic platinum compounds [Pt(NIA)2]·(L)·nH2O (L = dicarboxylate) were synthesized. In the reaction, acetonitrile undergoes trimerization in situ to generate N-(1-iminoethyl)acetamidine (NIA), which coordinates to PtII ions in forming the N-(1-iminoethyl)acetamidine platinum cation, while the organic carboxylates act as anions. Structural analysis shows that carboxylate ligands regulate the mode of packing of [Pt(NIA)2] in those compounds. Photoluminescence studies show that the photoluminescence behaviors of those compounds also depended on the carboxylate ligands. 1-4, 6, and 7 show blue light emission with fluorescence emission wavelengths of 437-440 nm despite the different carboxylate ligands used. 5 and 8 show green emissions with maximum intensity peak positions of 522 nm. Compared with that of 5 and 8, the emission of 9 and 10 has the same red shifts with peak positions of 567 and 528 nm. The variable-temperature photoluminescence studies reveal that 8 and 10 show two different thermal quenching (TQ) zones in the range of 80-420 K, while the emission intensity of 9 shows negative thermal quenching at low temperatures of 80-220 K and TQ in the range of 220-420 K.
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Affiliation(s)
- Ruo-Yi Zhang
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Ming-Hui Cui
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Wei-Wei Wang
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Wen-Liang Li
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Jiong-Peng Zhao
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
| | - Fu-Chen Liu
- School of Chemistry and Chemical Engineering, TKL of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, P. R. China
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11
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The structure and spectroscopic properties of the metallophilic Pt/Pd complexes based on pyridine/pyrazol ligands: A computational investigation. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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12
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Chelushkin PS, Shakirova JR, Kritchenkov IS, Baigildin VA, Tunik SP. Phosphorescent NIR emitters for biomedicine: applications, advances and challenges. Dalton Trans 2021; 51:1257-1280. [PMID: 34878463 DOI: 10.1039/d1dt03077a] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Application of NIR (near-infrared) emitting transition metal complexes in biomedicine is a rapidly developing area of research. Emission of this class of compounds in the "optical transparency windows" of biological tissues and the intrinsic sensitivity of their phosphorescence to oxygen resulted in the preparation of several commercial oxygen sensors capable of deep (up to whole-body) and quantitative mapping of oxygen gradients suitable for in vivo experimental studies. In addition to this achievement, the last decade has also witnessed the increased growth of successful alternative applications of NIR phosphors that include (i) site-specific in vitro and in vivo visualization of sophisticated biological models ranging from 3D cell cultures to intact animals; (ii) sensing of various biologically relevant analytes, such as pH, reactive oxygen and nitrogen species, RedOx agents, etc.; (iii) and several therapeutic applications such as photodynamic (PDT), photothermal (PTT), and photoactivated cancer (PACT) therapies as well as their combinations with other therapeutic and imaging modalities to yield new variants of combined therapies and theranostics. Nevertheless, emerging applications of these compounds in experimental biomedicine and their implementation as therapeutic agents practically applicable in PDT, PTT, and PACT face challenges related to a critically important improvement of their photophysical and physico-chemical characteristics. This review outlines the current state of the art and achievements of the last decade and stresses the most promising trends, major development prospects, and challenges in the design of NIR phosphors suitable for biomedical applications.
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Affiliation(s)
- Pavel S Chelushkin
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr., 26, 198504, St. Petersburg, Russia.
| | - Julia R Shakirova
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr., 26, 198504, St. Petersburg, Russia.
| | - Ilya S Kritchenkov
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr., 26, 198504, St. Petersburg, Russia.
| | - Vadim A Baigildin
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr., 26, 198504, St. Petersburg, Russia.
| | - Sergey P Tunik
- Institute of Chemistry, St. Petersburg State University, Universitetskii pr., 26, 198504, St. Petersburg, Russia.
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13
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Gong Z, Dan T, Yao J, Zhong Y. Supramolecular Assembly and Circularly Polarized Phosphorescence of Tridentate Platinum‐Isocyanide Complexes Modified with a Chiral Leucine Derivative. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zhong‐Liang Gong
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Ti‐Xiong Dan
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemilcal Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Jiannian Yao
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemilcal Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Yu‐Wu Zhong
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Photochemistry CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- School of Chemilcal Sciences University of Chinese Academy of Sciences Beijing 100049 China
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14
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Baykov SV, Mikherdov AS, Novikov AS, Geyl KK, Tarasenko MV, Gureev MA, Boyarskiy VP. π-π Noncovalent Interaction Involving 1,2,4- and 1,3,4-Oxadiazole Systems: The Combined Experimental, Theoretical, and Database Study. Molecules 2021; 26:5672. [PMID: 34577142 PMCID: PMC8466036 DOI: 10.3390/molecules26185672] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 11/17/2022] Open
Abstract
A series of N-pyridyl ureas bearing 1,2,4- (1a, 2a, and 3a) and 1,3,4-oxadiazole moiety (1b, 2b, 3b) was prepared and characterized by HRMS, 1H and 13C NMR spectroscopy, as well as X-ray diffraction. The inspection of the crystal structures of (1-3)a,b and the Hirshfeld surface analysis made possible the recognition of the (oxadiazole)···(pyridine) and (oxadiazole)···(oxadiazole) interactions. The presence of these interactions was confirmed theoretically by DFT calculations, including NCI analysis for experimentally determined crystal structures as well as QTAIM analysis for optimized equilibrium structures. The preformed database survey allowed the verification of additional examples of relevant (oxadiazole)···π interactions both in Cambridge Structural Database and in Protein Data Bank, including the cocrystal of commercial anti-HIV drug Raltegravir.
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Affiliation(s)
- Sergey V. Baykov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia; (S.V.B.); (A.S.M.); (A.S.N.); (K.K.G.)
| | - Alexander S. Mikherdov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia; (S.V.B.); (A.S.M.); (A.S.N.); (K.K.G.)
| | - Alexander S. Novikov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia; (S.V.B.); (A.S.M.); (A.S.N.); (K.K.G.)
| | - Kirill K. Geyl
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia; (S.V.B.); (A.S.M.); (A.S.N.); (K.K.G.)
| | - Marina V. Tarasenko
- Pharmaceutical Technology Transfer Centre, Yaroslavl State Pedagogical University Named after K.D. Ushinsky, 108 Respublikanskaya St., 150000 Yaroslavl, Russia;
| | - Maxim A. Gureev
- Research Center “Digital Biodesign and Personalized Healthcare”, I.M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia;
| | - Vadim P. Boyarskiy
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia; (S.V.B.); (A.S.M.); (A.S.N.); (K.K.G.)
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15
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Pinter P, Hennersdorf F, Weigand JJ, Strassner T. Polymorphic Phosphorescence from Separable Aggregates with Unique Photophysical Properties. Chemistry 2021; 27:13135-13138. [PMID: 34405914 PMCID: PMC8518788 DOI: 10.1002/chem.202100483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Indexed: 11/26/2022]
Abstract
Platinum complexes aggregate into polymorphs with different intermolecular interactions leading to different photophysical properties. Strong intermolecular interactions stabilize the aggregate to such an extent that the polymorphs can be separated directly by column chromatography. Solid‐state structures as well as quantum‐chemical calculations confirmed the effect of the interactions on the photophysical properties.
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Affiliation(s)
- Piermaria Pinter
- Physikalische Organische Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Felix Hennersdorf
- Anorganische Molekülchemie, Technische Universität Dresden, Mommsenstraße 4, 01069, Dresden, Germany
| | - Jan J Weigand
- Anorganische Molekülchemie, Technische Universität Dresden, Mommsenstraße 4, 01069, Dresden, Germany
| | - Thomas Strassner
- Physikalische Organische Chemie, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
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16
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Su BK, Wei YC, Chuang WT, Weng SC, Wang SF, Chen DG, Huang ZX, Chi Y, Chou PT. The Observation of Interchain Motion in Self-Assembled Crystalline Platinum(II) Complexes: An Exquisite Case but By No Means the Only One in Molecular Solids. J Phys Chem Lett 2021; 12:7482-7489. [PMID: 34342467 DOI: 10.1021/acs.jpclett.1c01677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In organic and organometallic solids, upon electronic excitation, most intermolecular structural relaxations follow a pathway along the π-π stacking direction or metal-metal bond with significant coupling strength. Differently, we discovered that the self-assembled platinum(II) complexes, Pt(fppz)2, exhibit an unusual interchain contraction. The ground-state and excited-state multiple local minima were distinguished by temperature-dependent excitation/emission spectra, indicating the existence of multiple local minima. The time-resolved emission decay revealed the excited-state structural relaxation lifetime with τobs = 41 ns at 298 K. Temperature-dependent X-ray diffraction analysis showed that the packing geometries contract 0.6 Å along the interchain direction (a-axis) at 50 K compared to the geometries at 298 K. Such structural displacements render the slow internal conversion rate in the excited states. We thus demonstrate the correlation between the packing geometries and the excited-state dynamics of the self-assembled Pt(II) complexes, shedding light on the unique direction of interchain structural deformation of the molecular aggregates.
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Affiliation(s)
- Bo-Kang Su
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yu-Chen Wei
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Wei-Tsung Chuang
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Shih-Chang Weng
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Sheng-Fu Wang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Deng-Gao Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Zhi-Xuan Huang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Yun Chi
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Materials Science and Engineering, Department of Chemistry, and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Kowloon 999077, Hong Kong SAR
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
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17
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18
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Sheet SK, Rabha M, Sen B, Patra SK, Aguan K, Khatua S. Ruthenium(II) Complex-Based G-quadruplex DNA Selective Luminescent 'Light-up' Probe for RNase H Activity Detection. Chembiochem 2021; 22:2880-2887. [PMID: 34314094 DOI: 10.1002/cbic.202100229] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 07/03/2021] [Indexed: 12/14/2022]
Abstract
A bis-heteroleptic ruthenium(II) complex, 1[PF6 ]2 of benzothiazole amide substituted 2,2'-bipyridine ligand (bmbbipy) has been synthesized for the selective detection of G-quadruplex (GQ) DNA and luminescence-assay-based RNase H activity monitoring. Compound 1[PF6 ]2 exhibited aggregation-caused quenching (ACQ) in water. Aggregate formation was supported by DLS, UV-vis, and 1 H NMR spectroscopy results, and the morphology of aggregated particles was witnessed by SEM and TEM. 1[PF6 ]2 acted as an efficient GQ DNA-selective luminescent light-up probe over single-stranded and double-stranded DNA. The competency of 1[PF6 ]2 for selective GQ structure detection was established by PL and CD spectroscopy. For 1[PF6 ]2 , the PL light-up is exclusively due to the rigidification of the benzothiazole amide side arm in the presence of GQ-DNA. The interaction between the probe and GQ-DNA was analyzed by molecular docking analysis. The GQ structure detection capability of 1[PF6 ]2 was further applied in the luminescent 'off-on' RNase H activity detection. The assay utilized an RNA:DNA hybrid, obtained from 22AG2-RNA and 22AG2-DNA sequences. RNase H solely hydrolyzed the RNA of the RNA:DNA duplex and released G-rich 22AG2-DNA, which was detected via the PL enhancement of 1[PF6 ]2 . The selectivity of RNase H activity detection over various other restriction enzymes was also demonstrated.
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Affiliation(s)
- Sanjoy Kumar Sheet
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
| | - Monosh Rabha
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
| | - Bhaskar Sen
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
| | - Sumit Kumar Patra
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
| | - Kripamoy Aguan
- Department of Biotechnology and Bioinformatics, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
| | - Snehadrinarayan Khatua
- Centre for Advanced Studies, Department of Chemistry, North-Eastern Hill University, 793022, Shillong, Meghalaya, India
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19
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Lantushenko AO, Meger YV, Tverdokhleb NM, Yakovleva YA, Eltsov OS, Evstigneev MP. Study of aggregation of O^N^N^O Pt(II) complexes in solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Lee S, Lee Y, Kim K, Heo S, Jeong DY, Kim S, Cho J, Kim C, You Y. Twist to Boost: Circumventing Quantum Yield and Dissymmetry Factor Trade-Off in Circularly Polarized Luminescence. Inorg Chem 2021; 60:7738-7752. [PMID: 33760606 DOI: 10.1021/acs.inorgchem.1c00070] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Circularly polarized luminescence (CPL) enables promising applications in asymmetric photonics. However, the performances of CPL molecules do not yet meet the requirements of these applications. The shortcoming originates from the trade-off in CPL between the photoluminescence quantum yield (PLQY) and the photoluminescence dissymmetry factor (gPL). In this study, we developed a molecular strategy to circumvent this trade-off. Our approach takes advantage of the strong propensity of [Pt(N^C^N)Cl], where the N^C^N ligand is 1-(2-oxazoline)-3-(2-pyridyl)phenylate, to form face-to-face stacks. We introduced chiral substituents, including (S)-methyl, (R)- and (S)-isopropyl, and (S)-indanyl groups, into the ligand framework. This asymmetric control induces torsional displacements that give homohelical stacks of the Pt(II) complexes. X-ray single-crystal structure analyses for the (S)-isopropyl Pt(II) complex reveal the formation of a homohelical dimer with a Pt···Pt distance of 3.48 Å, which is less than the sum of the van der Waals radii of Pt. This helical stack elicits the metal-metal-to-ligand charge-transfer (MMLCT) transition that exhibits strong chiroptical activity due to the electric transition moment making an acute angle to the magnetic transition moment. The PLQY and gPL values of the MMLCT phosphorescence emission of the (S)-isopropyl Pt(II) complex are 0.49 and 8.4 × 10-4, which are improved by factors of ca. 6 and 4, respectively, relative to the values of the unimolecular emission (PLQY, 0.078; gPL, 2.4 × 10-4). Our photophysical measurements for the systematically controlled Pt(II) complexes reveal that the CPL amplifications depend on the chiral substituent. Our investigations also indicate that excimers are not responsible for the enhanced chiroptical activity. To demonstrate the effectiveness of our approach, organic electroluminescence devices were fabricated. The MMLCT emission devices were found to exhibit simultaneous enhancements in the external quantum efficiency (EQE, 9.7%) and the electroluminescence dissymmetry factor (gEL, 1.2 × 10-4) over the unimolecular emission devices (EQE, 5.8%; gEL, 0.3 × 10-4). These results demonstrate the usefulness of using the chiroptically active MMLCT emission for achieving an amplified CPL.
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Affiliation(s)
- Sumin Lee
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Yongmoon Lee
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungmin Kim
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
| | - Seunga Heo
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dong Yeun Jeong
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sangsub Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaeheung Cho
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea.,Department of Chemistry, UNIST, Ulsan 44919, Republic of Korea
| | - Changsoon Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Youngmin You
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
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21
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Suleymanova AF, Yakovleva YA, Eltsov OS, Lantushenko AO, Evstigneev MP, Donnio B, Heinrich B, Kozhevnikov VN. Comparative analysis of self-aggregation of liquid crystalline Pt(II) complexes in solution and in neat films. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Su MM, Kang JJ, Liu SQ, Meng CG, Li YQ, Zhang JJ, Ni J. Strategy for Achieving Long-Wavelength Near-Infrared Luminescence of Diimineplatinum(II) Complexes. Inorg Chem 2021; 60:3773-3780. [PMID: 33615779 DOI: 10.1021/acs.inorgchem.0c03529] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Although many strategies have been used to help design effective near-infrared (NIR) luminescent materials, it is still a huge challenge to realize long-wavelength NIR luminescence of diimineplatinum(II) complexes in the solid state. Herein, we have successfully achieved long-wavelength NIR luminescence of a family of diimineplatinum(II) complexes based on a new strategy that combines a one-dimensional (1D) "Pt wire" structure with the electronic effect of the substituent. The structures of six solvated diimineplatinum(II) complexes based on 4,4-dichloro-2,2'-bipyridine or 4,4-dibromo-2,2'-bipyridine and 4-substituted phenylacetylene ligands have been determined, namely, 1·1/2toluene, 2·1/2THF, 3·1/8toluene, 4·1/2THF, 5·1/8CH2Cl2, and 6·1/4toluene. All of them crystallize in the monoclinic space group C2/c or C2/m and stack in the 1D "Pt wire" structure. In the solid state, six complexes exhibited unusual long-wavelength metal-metal-to-ligand charge-transfer luminescence that peaked at 984, 1044, 972, 990, 1022, and 935 nm, respectively. Interestingly, 2·1/2THF has the shortest Pt···Pt distance and the longest emission wavelength among the six complexes. As far as we know, the luminescence of 2·1/2THF at 1044 nm is the longest emission wavelength among known diimineplatinum(II) complexes. Systematic studies revealed that good molecular planarity, suitable substituent position, weak hydrogen-bond-forming ability of the substituents, appropriate molecular bending, and weakening of the interaction between solvated molecules and platinum molecules are conducive to the construction of a 1D "Pt wire" structure of the diimineplatinum(II) complex. Furthermore, the emission energy of the complex is mainly determined by the strength of the Pt-Pt interaction and electronic effect of the substituent.
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Affiliation(s)
- Meng-Meng Su
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jia-Jia Kang
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Shu-Qin Liu
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Chang-Gong Meng
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Yan-Qin Li
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jian-Jun Zhang
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
| | - Jun Ni
- College of Chemistry, Dalian University of Technology, Linggong Road, No. 2, Dalian 116024, P. R. China
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23
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Katkova SA, Eliseev II, Mikherdov AS, Sokolova EV, Starova GL, Kinzhalov MA. Cyclometalated Platinum(II) Complexes with Nitrile and Isocyanide Ligands: Synthesis, Structure, and Photophysical Properties. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221030099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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24
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Iwamura M, Fukui A, Nozaki K, Kuramochi H, Takeuchi S, Tahara T. Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011813] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Munetaka Iwamura
- Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama 930-8555 Japan
| | - Airi Fukui
- Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama 930-8555 Japan
| | - Koichi Nozaki
- Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama 930-8555 Japan
| | - Hikaru Kuramochi
- Molecular Spectroscopy Laboratory RIKEN 2-1 Hirosawa Wako 351-0198 Japan
- Ultrafast Spectroscopy Research Team RIKEN Center for Advanced Photonics (RAP) 2-1 Hirosawa Wako 351-0198 Japan
- JST PRESTO 4-1-8 Honcho Kawaguchi 332-0012 Japan
- Current address: Research Center of Integrative Molecular Systems (CIMoS) Institute for Molecular Science 38 Nishigo-Naka, Myodaiji Okazaki 444-8585 Japan
| | - Satoshi Takeuchi
- Molecular Spectroscopy Laboratory RIKEN 2-1 Hirosawa Wako 351-0198 Japan
- Ultrafast Spectroscopy Research Team RIKEN Center for Advanced Photonics (RAP) 2-1 Hirosawa Wako 351-0198 Japan
- Current address: Graduate School of Material Science University of Hyogo 3-2-1 Kohto Kamigori Hyogo 678-1297 Japan
| | - Tahei Tahara
- Molecular Spectroscopy Laboratory RIKEN 2-1 Hirosawa Wako 351-0198 Japan
- Ultrafast Spectroscopy Research Team RIKEN Center for Advanced Photonics (RAP) 2-1 Hirosawa Wako 351-0198 Japan
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25
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Coherent Vibration and Femtosecond Dynamics of the Platinum Complex Oligomers upon Intermolecular Bond Formation in the Excited State. Angew Chem Int Ed Engl 2020; 59:23154-23161. [DOI: 10.1002/anie.202011813] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Indexed: 11/07/2022]
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26
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Shakirova JR, Hendi Z, Zhukovsky DD, Sokolov VV, Jamali S, Pavlovskiy VV, Porsev VV, Evarestov RA, Tunik SP. NIR emitting platinum pincer complexes based on the N^N^C ligand containing {benz[4,5]imidazo[1,2-a]pyrazin} aromatic system; synthesis, characterization and photophysical study. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Kritchenkov IS, Zhukovsky DD, Mohamed A, Korzhikov-Vlakh VA, Tennikova TB, Lavrentieva A, Scheper T, Pavlovskiy VV, Porsev VV, Evarestov RA, Tunik SP. Functionalized Pt(II) and Ir(III) NIR Emitters and Their Covalent Conjugates with Polymer-Based Nanocarriers. Bioconjug Chem 2020; 31:1327-1343. [PMID: 32223218 DOI: 10.1021/acs.bioconjchem.0c00020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Two NIR-emitting platinum [Pt(N^N^C)(phosphine)] and iridium [Ir(N^C)2(N^N)]+ complexes containing reactive succinimide groups were synthesized and characterized with spectroscopic methods (N^N^C, 1-phenyl-3-(pyridin-2-yl)benzo[4,5]imidazo[1,2-a]pyrazine, N^C, 6-(2-benzothienyl)phenanthridine, phosphine-3-(diphenylphosphaneyl)propanoic acid N-hydroxysuccinimide ether, and N^N, 4-oxo-4-((1-(pyridin-2-yl)-1H-1,2,3-triazol-4-yl)methoxy)butanoic acid N-hydroxysuccinimide ether). Their photophysics were carefully studied and analyzed using time-dependent density functional theory calculations. These complexes were used to prepare luminescent micro- and nanoparticles with the "core-shell" morphology, where the core consisted of biodegradable polymers of different hydrophobicity, namely, poly(d,l-lactic acid), poly(ε-caprolactone), and poly(ω-pentadecalactone), whereas the shell was formed by covalent conjugation with poly(l-lysine) covalently labeled with the platinum and iridium emitters. The surface of the species was further modified with heparin to reverse their charge from positive to negative values. The microparticles' size determined with dynamic laser scanning varies considerably from 720 to 1480 nm, but the nanoparticles' diameter falls in a rather narrow range, 210-230 nm. The species with a poly(l-lysine) shell display a high positive (>30 mV) zeta-potential that makes them essentially stable in aqueous media. Inversion of the surface charge to a negative value with the heparin cover did not deteriorate the species' stability. The iridium- and platinum-containing particles displayed emissions the spectral patterns of which were essentially similar to those of unconjugated complexes, which indicate retention of the chromophore nature upon binding to the polymer and further immobilization onto polyester micro- and nanoparticles for drug delivery. The obtained particles were tested to determine their ability to penetrate into different cells types: cancer cells, stem cells, and fibroblasts. It was found that all types of particles could effectively penetrate into all cells types under investigation. Nanoparticles were shown to penetrate into the cells more effectively than microparticles. However, positively charged nanoparticles covered with poly(l-lysine) seem to interact with negatively charged proteins in the medium and enter the inner part of the cells less effectively than nanoparticles covered with poly(l-lysine)/heparin. In the case of microparticles, the species with positive zeta-potentials were more readily up-taken by the cells than those with negative values.
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Affiliation(s)
- Ilya S Kritchenkov
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | - Daniil D Zhukovsky
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | - Abdelrahman Mohamed
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia.,Faculty of Science, Chemistry Department, Beni-Suef University, 62511 Beni-Suef, Egypt
| | | | - Tatiana B Tennikova
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | | | - Thomas Scheper
- Institute of Technical Chemistry, Leibniz University, 30167 Hannover, Germany
| | - Vladimir V Pavlovskiy
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | - Vitaly V Porsev
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | - Robert A Evarestov
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
| | - Sergey P Tunik
- Institute of Chemistry, Saint-Petersburg State University, Saint-Petersburg 198504, Russia
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28
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Racioppi S, Andrzejewski M, Colombo V, Sironi A, Macchi P. Different Metallophilic Attitudes Revealed by Compression. Inorg Chem 2020; 59:2223-2227. [DOI: 10.1021/acs.inorgchem.9b02852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefano Racioppi
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012, Switzerland
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy
| | - Michał Andrzejewski
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, Bern CH-3012, Switzerland
| | - Valentina Colombo
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy
| | - Angelo Sironi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi, 19, 20133 Milano, Italy
| | - Piero Macchi
- Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, Via Mancinelli, 7, 20131 Milano, Italy
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29
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Yamamoto K, Higuchi K, Ogawa M, Sogawa H, Kuwata S, Hayashi Y, Kawauchi S, Takata T. Macrocyclic Metal Complexes Bearing Rigid Polyaromatic Ligands: Synthesis and Catalytic Activity. Chem Asian J 2020; 15:356-359. [PMID: 31823483 DOI: 10.1002/asia.201901561] [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: 11/07/2019] [Revised: 12/09/2019] [Indexed: 11/10/2022]
Abstract
We synthesised palladium and platinum complexes possessing cyclic and acyclic pincer-type polyaromatic ligands and investigated their structural effect on the catalysis. The pincer-type bis(6-arylpyridin-2-yl)benzene skeleton was constructed via Kröhnke pyridine synthesis under transition metal-free conditions on gram-scale quantity. Ligand structure significantly influenced catalytic activity toward the platinum-catalysed hydrosilylation of diphenyl acetylenes, despite the ligand-independence of the conformations and electronic properties of these complexes.
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Affiliation(s)
- Koji Yamamoto
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,Present address: Division of Molecular Science, Faculty of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Kazuki Higuchi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Masahiro Ogawa
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Hiromitsu Sogawa
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,Present address: Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Shigeki Kuwata
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Yoshihiro Hayashi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Susumu Kawauchi
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo, 152-8552, Japan
| | - Toshikazu Takata
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
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30
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Yang XP, Li HX, Yuan K, Zuo GF, Li ZF. The mutual noncovalent interactions based on metallophilic cluster and anions: A theoretical investigation of the molecular structure and spectroscopic properties of Host–Guest complexes. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2019. [DOI: 10.1142/s0219633619500287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The d[Formula: see text] metallophilic host clusters [Au(NHC)2][Formula: see text] [M(CN)2][Formula: see text] [Au(NHC)2][Formula: see text](NHC [Formula: see text] N-heterocyclic carbene, [Formula: see text], Ag) with high phosphorescence are synthesized recently and their phosphorescent modulation by solvents is investigated in theory. In this paper, the guest anions (F−, Cl−, Br−, NO[Formula: see text], and BF[Formula: see text] are used to elucidate their effects on metallophilic interactions and phosphorescence of hosts, and also they served as the probes to study the recognition characters of metallophilic hosts. The calculation shows that the guest anions can mutually interact with the host clusters and further, which can modulate the metallophilic Au[Formula: see text]M distances and the phosphorescence spectra of the hosts.
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Affiliation(s)
- Xiao-Ping Yang
- School of Civil Engineering, Tianshui Normal University, Tianshui 741001, P. R. China
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, P. R. China
| | - Hui-Xue Li
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, P. R. China
| | - Kun Yuan
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, P. R. China
| | - Guo-Fang Zuo
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, P. R. China
| | - Zhi-Feng Li
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, P. R. China
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31
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Evstigneev MP, Lantushenko AO, Yakovleva YA, Suleymanova AF, Eltsov OS, Kozhevnikov VN. Tuning the Aggregation of N
^
N
^
C Pt(II) Complexes by Varying the Aliphatic Side Chain and Auxiliary Halide Ligand:
1
H and
195
Pt NMR Investigation. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900821] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Maxim P. Evstigneev
- Department of Physics Sevastopol State University 299053 Sevastopol Russian Federation
- Belgorod State University 85 Pobedy str. 308015 Belgorod Russian Federation
| | | | - Yulia A. Yakovleva
- Department of Technology for Organic Synthesis Chemical Technology Institute Ural Federal University 620002 Yekaterinburg Russian Federation
| | - Alfiya F. Suleymanova
- Department of Technology for Organic Synthesis Chemical Technology Institute Ural Federal University 620002 Yekaterinburg Russian Federation
| | - Oleg S. Eltsov
- Department of Technology for Organic Synthesis Chemical Technology Institute Ural Federal University 620002 Yekaterinburg Russian Federation
| | - Valery N. Kozhevnikov
- Department of Applied Sciences Northumbria University NE1 8ST Newcastle‐Upon‐Tyne UK
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32
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Cuerva C, Campo JA, Cano M, Lodeiro C. Multi-Stimuli-Responsive Properties of Aggregation-Enhanced Emission-Active Unsymmetrical Pt II Metallomesogens through Self-Assembly. Chemistry 2019; 25:12046-12051. [PMID: 31237959 DOI: 10.1002/chem.201901763] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/20/2019] [Indexed: 11/09/2022]
Abstract
Herein, we report a series of unsymmetrical bispyrazolate-type PtII compounds that exhibit mesomorphism at low temperatures and photophysical multi-stimuli-responsive properties. These PtII compounds show a great ability to be self-assembled by intermolecular Pt⋅⋅⋅Pt interactions in the solid state, so generating a columnar stacking of molecules that is responsible for the formation of the mesophases. By controlling the nature of the molecular assembly through external stimuli such as the temperature, the pressure, or the presence of vapours or solvents, it is possible to modulate the luminescence behaviour of these materials. The PtII monomers emit a greenish light, whereas aggregation of molecules produces a redshifted emission. These metallomesogens also show a high stability and successive grinding/fuming cycles can be performed without degradation of the sample. The application of these materials is very attractive as rewritable luminescent platforms, and their use is already demonstrated.
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Affiliation(s)
- Cristián Cuerva
- BIOSCOPE Research Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, 2829-516, Caparica, Portugal.,Department of Inorganic Chemistry, Complutense University of Madrid, Ciudad Universitaria, 28040, Madrid, Spain
| | - José A Campo
- Department of Inorganic Chemistry, Complutense University of Madrid, Ciudad Universitaria, 28040, Madrid, Spain
| | - Mercedes Cano
- Department of Inorganic Chemistry, Complutense University of Madrid, Ciudad Universitaria, 28040, Madrid, Spain
| | - Carlos Lodeiro
- BIOSCOPE Research Group, LAQV@REQUIMTE, Chemistry Department, Faculty of Science and Technology, University NOVA of Lisbon, 2829-516, Caparica, Portugal.,PROTEOMASS Scientific Society, Rua dos Inventores, Madam Parque, Caparica Campus, 2829-516, Caparica, Portugal
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33
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Le NHT, Inoue R, Kawamorita S, Komiya N, Naota T. Phosphorescent Molecules That Resist Concentration Quenching in the Solution State: Concentration-Driven Emission Enhancement of Vaulted trans-Bis[2-(iminomethyl)imidazolato]platinum(II) Complexes. Inorg Chem 2019; 58:9076-9084. [DOI: 10.1021/acs.inorgchem.9b00608] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ngoc Ha-Thu Le
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Ryo Inoue
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Soichiro Kawamorita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Naruyoshi Komiya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
- Chemistry Laboratory, The Jikei University School of Medicine, Kokuryo, Chofu, Tokyo 182-8570, Japan
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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34
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Gil-Moles M, Gimeno MC, López-de-Luzuriaga JM, Monge M, Olmos ME. Temperature-assisted formation of reversible metallophilic Au-Ag interaction arrays. Dalton Trans 2019; 48:5149-5155. [PMID: 30924819 DOI: 10.1039/c9dt00751b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A temperature-controlled self-assembly process in a solution of [Ag(terpy)]nn+ and [Au(C6F5)2]- units has been performed. For this, the crystallisation of the complex [{Au(C6F5)2}Ag(terpy)]n under the same experimental conditions, changing only the temperature, allows the synthesis of polymorphs [{Au(C6F5)2}2Ag2(terpy)2]n (2a) at 298 K and [{Au(C6F5)2}Ag(terpy)]n (2b) at 280 K. The X-ray diffraction studies previously reported for 2a revealed a polymeric structure with an unusual + + - - + + - - charge sequence, whereas for polymorph 2b, a more classical + - + - disposition has been obtained. The conversion of one polymorph into the other can be achieved by simple dissolution of one of them and by recrystallisation at the corresponding temperature. The mechanism of the formation of each polymorph is proposed in view of their 1H NMR, 1H-PGSE NMR and molar conductivity measurements.
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Affiliation(s)
- María Gil-Moles
- Departamento de Química, Universidad de La Rioja, Centro de Investigación en Síntesis Química (CISQ), Complejo Científico-Tecnológico, 26004-Logroño, Spain.
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35
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Giménez N, Lalinde E, Lara R, Moreno MT. Design of Luminescent, Heteroleptic, Cyclometalated Pt
II
and Pt
IV
Complexes: Photophysics and Effects of the Cyclometalated Ligands. Chemistry 2019; 25:5514-5526. [DOI: 10.1002/chem.201806240] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Indexed: 01/31/2023]
Affiliation(s)
- Nora Giménez
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - Elena Lalinde
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - Rebeca Lara
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
| | - M. Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ)Universidad de La Rioja 26006 Logroño Spain
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36
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Iwamura M, Kimoto K, Nozaki K, Kuramochi H, Takeuchi S, Tahara T. Metal-Metal Bond Formations in [Au(CN) 2-] n ( n = 3-5) Oligomers in Water Identified by Coherent Nuclear Wavepacket Motions. J Phys Chem Lett 2018; 9:7085-7089. [PMID: 30422661 DOI: 10.1021/acs.jpclett.8b03139] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Large oligomers of [Au(CN)2-] n including the pentamer were favorably formed in an aqueous solution containing tetra-ethylammonium chloride (1.0 mol/dm3), and intense transient absorption in the visible region was recorded by selective photoexcitation of the oligomers. Distinct oscillations at ∼40-100 cm-1 were clearly observed in the temporal profile of the excited-state absorption signal, and the frequency-wavelength two-dimensional analysis of the oscillation clearly distinguishes the coherent nuclear motion of different oligomers. The observed nuclear motions were assigned to Au-Au stretch vibrations in the trimer, tetramer, and pentamer induced by the bond formation in the excited states. The transient absorption exhibits significant changes with a time constant of 3-20 ps, reflecting intersystem crossing and structural change.
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Affiliation(s)
- Munetaka Iwamura
- Graduate School of Science and Engineering , University of Toyama , 3190 Gofuku , Toyama 930-8555 , Japan
| | - Kenshi Kimoto
- Graduate School of Science and Engineering , University of Toyama , 3190 Gofuku , Toyama 930-8555 , Japan
| | - Koichi Nozaki
- Graduate School of Science and Engineering , University of Toyama , 3190 Gofuku , Toyama 930-8555 , Japan
| | - Hikaru Kuramochi
- Molecular Spectroscopy Laboratory , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
- Ultrafast Spectroscopy Research Team , RIKEN Center for Advanced Photonics (RAP), RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
- PRESTO, Japan Science and Technology Agency , 4-1-8 Honcho , Kawaguchi , Saitama 332-0012 , Japan
| | - Satoshi Takeuchi
- Molecular Spectroscopy Laboratory , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
- Ultrafast Spectroscopy Research Team , RIKEN Center for Advanced Photonics (RAP), RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
| | - Tahei Tahara
- Molecular Spectroscopy Laboratory , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
- Ultrafast Spectroscopy Research Team , RIKEN Center for Advanced Photonics (RAP), RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan
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37
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Zhukovskaya MA, Zhukovsky DD, Pavlovskiy VV, Porsev VV, Evarestov RA, Tunik SP. Binuclear platinum(II) complexes based on a new bis-bidentate 3,6-di(thien-2-yl)pyridazine skeleton, a novel type of deep-red phosphorescent emitters: Synthesis and nonempirical calculations. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Ohno K, Kusano Y, Kaizaki S, Nagasawa A, Fujihara T. Chromism of Tartrate-Bridged Clamshell-like Platinum(II) Complex: Intramolecular Pt–Pt Interaction-Induced Luminescence Vapochromism and Intermolecular Interactions-Triggered Thermochromism. Inorg Chem 2018; 57:14159-14169. [DOI: 10.1021/acs.inorgchem.8b02074] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keiji Ohno
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan
| | - Yukiko Kusano
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan
| | - Sumio Kaizaki
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Akira Nagasawa
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan
| | - Takashi Fujihara
- Comprehensive Analysis Center for Science, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan
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39
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Li ZF, Yang XP, Li HX, Zuo GF. Phosphorescent Modulation of Metallophilic Clusters and Recognition of Solvents through a Flexible Host-Guest Assembly: A Theoretical Investigation. NANOMATERIALS 2018; 8:nano8090685. [PMID: 30200542 PMCID: PMC6163230 DOI: 10.3390/nano8090685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 08/27/2018] [Accepted: 08/28/2018] [Indexed: 12/29/2022]
Abstract
MP2 (Second order approximation of Møller–Plesset perturbation theory) and DFT/TD-DFT (Density functional theory/Time-dependent_density_functional_theory) investigations have been performed on metallophilic nanomaterials of host clusters [Au(NHC)2]+⋅⋅⋅[M(CN)2]−⋅⋅⋅[Au(NHC)2]+ (NHC = N-heterocyclic carbene, M = Au, Ag) with high phosphorescence. The phosphorescence quantum yield order of clusters in the experiments was evidenced by their order of μS1/ΔES1−T1 values (μS1: S0 → S1 transition dipole, ∆ES1−T1: splitting energy between the lowest-lying singlet S1 and the triplet excited state T1 states). The systematic variation of the guest solvents (S1: CH3OH, S2: CH3CH2OH, S3: H2O) are employed not only to illuminate their effect on the metallophilic interaction and phosphorescence but also as the probes to investigate the recognized capacity of the hosts. The simulations revealed that the metallophilic interactions are mainly electrostatic and the guests can subtly modulate the geometries, especially metallophilic Au⋅⋅⋅M distances of the hosts through mutual hydrogen bond interactions. The phosphorescence spectra of hosts are predicted to be blue-shifted under polar solvent and the excitation from HOMO (highest occupied molecular orbital) to LUMO (lowest unoccupied molecular orbital) was found to be responsible for the 3MLCT (triplet metal-to-ligand charge transfer) characters in the hosts and host-guest complexes. The results of investigation can be introduced as the clues for the design of promising blue-emitting phosphorescent and functional materials.
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Affiliation(s)
- Zhi-Feng Li
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, China.
| | - Xiao-Ping Yang
- School of Electronic Information and Electrical Engineering, Tianshui Normal University, Tianshui 741001, China.
| | - Hui-Xue Li
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, China.
| | - Guo-Fang Zuo
- College of Chemical Engineering and Technology, Key Laboratory for New Molecule Design and Function of Gansu Universities, Tianshui Normal University, Tianshui 741001, China.
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40
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Red-emitting cyclometalated platinum(II) complexes with imidazolyl phenanthrolines: Synthesis and photophysical properties. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.04.045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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41
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Shakirova JR, Tomashenko OA, Galenko EE, Khlebnikov AF, Hirva P, Starova GL, Su SH, Chou PT, Tunik SP. Metalated Ir(III) Complexes Based on the Luminescent Diimine Ligands: Synthesis and Photophysical Study. Inorg Chem 2018; 57:6853-6864. [DOI: 10.1021/acs.inorgchem.8b00390] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Julia R. Shakirova
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
| | - Olesya A. Tomashenko
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
| | - Ekaterina E. Galenko
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
| | - Alexander F. Khlebnikov
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
| | - Pipsa Hirva
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
| | - Galina L. Starova
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
| | - Shih-Hao Su
- Department of Chemistry, National Taiwan University, Taipei, 10617 Taiwan, R.O.C
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei, 10617 Taiwan, R.O.C
| | - Sergey P. Tunik
- St. Petersburg State University, Institute of Chemistry, 7/9 Universitetskaya emb., 199034 St. Petersburg, Russia
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42
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Kinzhalov MA, Katkova SA, Doronina EP, Novikov AS, Eliseev II, Ilichev VA, Kukinov AA, Starova GL, Bokach NA. Red photo- and electroluminescent half-lantern cyclometalated dinuclear platinum(II) complex. Z KRIST-CRYST MATER 2018. [DOI: 10.1515/zkri-2018-2075] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
New cyclometalated dinuclear platinum(II) complex bearing bridged 4,6-dimethylpyrimidine-2(1H)-thiolate (μ-C6H7N2S-κN,S) ligands, [{Pt(ppy)(μ-C6H7N2S-κN,S)}2] (3) (ppy=(2-phenylpyridinato-C2,N)) was prepared via the reaction of chloro-bridged dimer [{Pt(ppy)Cl}2] with 4,6-dimethylpyrimidine-2(1H)-thione (C6H8N2S) in the presence of t-BuOK. The complex holds dinuclear frameworks with short Pt(II)···Pt(II) distance (2.8877(3) Å), and exhibit red intense luminescence from the triplet metal-metal-to-ligand charge-transfer at 697 nm in CH2Cl2 solution and at 649 nm in solid state at RT. Single crystal XRD analysis reveals the metallophilic interactions Pt···Pt with significant covalent contribution in the structure of 3 which were studied by quasi-relativistic and relativistic DFT calculations (viz., M06/MWB60(Pt) and 6-311+G* (other atoms); M06/DZP-DKH levels of theory) and topological analysis of the electron density distribution within the framework of Bader’s theory (QTAIM method). Estimated strength of the Pt···Pt contact is 8.1–12.2 kcal/mol and it is mostly determined by crystal packing effects and weak attractive interactions between the adjacent metal centers due to overlapping of their dz2 and pz orbitals. An organic light-emitting diode based on this complex showed red electroluminescence with maximal luminance of 115 cd/m2 and current efficiency of 2.45 cd/A at this luminance.
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Affiliation(s)
- Mikhail A. Kinzhalov
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Svetlana A. Katkova
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Elizaveta P. Doronina
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Alexander S. Novikov
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Ivan I. Eliseev
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Vasiliy A. Ilichev
- G.A. Razuvaev Institute of Organometallic Chemistry of RAS , Tropinina 49 , Nizhny Novgorod 603950 , Russia
| | - Andrey A. Kukinov
- G.A. Razuvaev Institute of Organometallic Chemistry of RAS , Tropinina 49 , Nizhny Novgorod 603950 , Russia
| | - Galina L. Starova
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
| | - Nadezhda A. Bokach
- Saint Petersburg State University , Universitetskaya Nab. 7/9 , St. Petersburg, 199034 , Russian Federation
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43
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Yamaguchi K, Yamawaki K, Kimura T, Kuwabara J, Yasuda T, Nishimura Y, Kanbara T. Multi-molecular emission of a cationic Pt(ii) complex through hydrogen bonding interactions. Dalton Trans 2018; 47:4087-4092. [PMID: 29451289 DOI: 10.1039/c8dt00314a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cationic Pt complexes with amide groups have been found to show dimer emission through hydrogen bonding interactions with counter anions even at low concentration. In order to investigate further details of dimer emission, we prepared three Pt complexes, Pt·B(C6F5)4, Pt·Cl, and Pt·PF6, whose counter anions possess different strengths of a hydrogen bonding acceptor. Hydrogen bonding interactions in the ground state and excited-state dynamics of the Pt complexes were evaluated by NMR analysis, temperature dependence, and kinetics of dimer emission. These studies revealed that the hydrogen bonding interaction in the ground state is essential for dimer emission, but too strong hydrogen bonding prevents dimer emission due to the inhibition of a stacked dimer formation in the excited state. Owing to this trade-off, the Pt complex with a moderate hydrogen bonding acceptor, PF6-, most effectively shows dimer emission. In general, a strong supramolecular interaction efficiently provides a desired assembled structure showing multi-molecular emission. We revealed a unique phenomenon that a moderate interaction is beneficial to effective multi-molecular emission.
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Affiliation(s)
- Kaho Yamaguchi
- Tsukuba Research Center for Energy Materials Science (TREMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
| | - Kazuma Yamawaki
- Tsukuba Research Center for Energy Materials Science (TREMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
| | - Takuya Kimura
- Tsukuba Research Center for Energy Materials Science (TREMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
| | - Junpei Kuwabara
- Tsukuba Research Center for Energy Materials Science (TREMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
| | - Takeshi Yasuda
- Research Center for Functional Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Yoshinobu Nishimura
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Takaki Kanbara
- Tsukuba Research Center for Energy Materials Science (TREMS), Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan.
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44
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Mikherdov AS, Novikov AS, Kinzhalov MA, Boyarskiy VP, Starova GL, Ivanov AY, Kukushkin VY. Halides Held by Bifurcated Chalcogen–Hydrogen Bonds. Effect of μ(S,N–H)Cl Contacts on Dimerization of Cl(carbene)PdII Species. Inorg Chem 2018; 57:3420-3433. [DOI: 10.1021/acs.inorgchem.8b00190] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander S. Mikherdov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Alexander S. Novikov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Mikhail A. Kinzhalov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Vadim P. Boyarskiy
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Galina L. Starova
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Alexander Yu. Ivanov
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
| | - Vadim Yu. Kukushkin
- Saint Petersburg State University, 7/9 Universitetskaya Nab., Saint Petersburg 199034, Russian Federation
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45
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Lalinde E, Lara R, López IP, Moreno MT, Alfaro-Arnedo E, Pichel JG, Piñeiro-Hermida S. Benzothiazole-Based Cycloplatinated Chromophores: Synthetic, Optical, and Biological Studies. Chemistry 2018; 24:2440-2456. [PMID: 29219223 DOI: 10.1002/chem.201705267] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Indexed: 02/05/2023]
Abstract
Cycloplatinated complexes based on 2-(4-substituted)benzothiazole ligands of type [Pt(R-PBT-κC,N)Cl(L)] (PBT=2-phenylbenzothiazole; R=Br (1), Me2 N (2); L=dimethyl sulfoxide (DMSO; a), 1,3,5- triaza-7-phosphaadamantane (PTA; b), triphenylphosphine 3,3',3''-trisulfonate (TPPTS; c)) and [Pt(Br-PBT-κC)Cl(PTA)2 ] (3) are presented. On the basis of the photophysical data and time-dependent (TD)-DFT calculations (1 a and 2 a), the low-lying transitions (absorption and emission) were associated with ligand-center (LC) charge transfer, with minor metal-to-ligand charge transfer (MLCT), and intraligand charge transfer (ILCT) [Me2 N-PBT→PBT] excited states, respectively. Simultaneous fluorescence/phosphorescence bands were found in fluid solutions (and also in the solid state for 2 a), which become dominated by triplet emission bands in rigid media at 77 K. The effect of the concentration on emissive behavior of 2 a, b indicated the occurrence of aggregation-induced luminescence properties related to the occurrence of metal-metal and π⋅⋅⋅π interactions, which are more enhanced in 2 a because of the less bulky DMSO ligand. The behavior of 2 a toward para-toluenesulfonic acid (PTSA) in aerated acetonitrile and to hydrogen chloride gas in the solid state has been evaluated, thus showing a clear reversible change between the 1 ILCT and 3 LC/3 MLCT states due to protonation of the NMe2 group (theoretical calculations on 2 a-H+ ). Solid 2 a undergoes a surprising oxidation of the PtII center to PtIV with concomitant deoxygenation of DMSO, under prolonged reaction with hydrogen chloride gas to afford the PtIV /dimethyl sulfide complex (mer-[Pt(Me2 N-PBT-κC,N)Cl3 (SMe2 )]; mer-4), which evolves in solution to fac-4, as confirmed by X-ray studies. Cytotoxic activity studies on A549 and HeLa cell lines indicated cytotoxic activity of 1 b and 2 a, b. In addition, fluorescent cell microscopy revealed cytoplasmic staining, more visible in perinuclear areas. Inhibition of tubulin polymerization by 1 b in both cells is presented as a preliminary mechanism of its cytotoxic action.
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Affiliation(s)
- Elena Lalinde
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ), Universidad de La Rioja, 26006, Logroño, Spain
| | - Rebeca Lara
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ), Universidad de La Rioja, 26006, Logroño, Spain
| | - Icíar P López
- Lung Cancer and Respiratory Diseases Unit, Centro de Investigación Biomédica de La Rioja (CIBIR), Fundación Rioja Salud, 26006, Logroño, Spain
| | - M Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ), Universidad de La Rioja, 26006, Logroño, Spain
| | - Elvira Alfaro-Arnedo
- Lung Cancer and Respiratory Diseases Unit, Centro de Investigación Biomédica de La Rioja (CIBIR), Fundación Rioja Salud, 26006, Logroño, Spain
| | - José G Pichel
- Lung Cancer and Respiratory Diseases Unit, Centro de Investigación Biomédica de La Rioja (CIBIR), Fundación Rioja Salud, 26006, Logroño, Spain
| | - Sergio Piñeiro-Hermida
- Lung Cancer and Respiratory Diseases Unit, Centro de Investigación Biomédica de La Rioja (CIBIR), Fundación Rioja Salud, 26006, Logroño, Spain
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46
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Bischoff L, Baudequin C, Hoarau C, Urriolabeitia EP. Organometallic Fluorophores of d 8 Metals (Pd, Pt, Au). ADVANCES IN ORGANOMETALLIC CHEMISTRY 2018. [DOI: 10.1016/bs.adomc.2018.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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47
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Sesolis H, Chan CKM, Gontard G, Fu HLK, Yam VWW, Amouri H. Dinuclear (N∧C∧N) Pincer Pt(II) Complexes with Bridged Organometallic Linkers: Synthesis, Structures, Self-Aggregation, and Photophysical Properties. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00680] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hugo Sesolis
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
| | - Carmen Ka-Man Chan
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Geoffrey Gontard
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
| | - Heidi Li-Ki Fu
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Vivian Wing-Wah Yam
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Hani Amouri
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
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48
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Kisel KS, Melnikov AS, Grachova EV, Hirva P, Tunik SP, Koshevoy IO. Linking Re I and Pt II Chromophores with Aminopyridines: A Simple Route to Achieve a Complicated Photophysical Behavior. Chemistry 2017. [PMID: 28636113 DOI: 10.1002/chem.201701539] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The bifunctional aminopyridine ligands H2 N-(CH2 )n -4-C5 H4 N (n=0, L1; 1, L2; 2, L3) have been utilized for the preparation of the rhenium complexes [Re(phen)(CO)3 (L1-L3)]+ (1-3; phen=phenanthroline). Complexes 2 and 3 with NH2 -coordinated L2 and L3, respectively, were coupled with cycloplatinated motifs {Pt(ppy)Cl} and {Pt(dpyb)}+ (ppy=2-phenylpyridine, dpyb=dipyridylbenzene) to give the bimetallic species [Re(phen)(CO)3 (μ-L2/L3)Pt(ppy)Cl]+ (4, 6) and [Re(phen)(CO)3 (μ-L2/L3)Pt(dpyb)]2+ (5, 7). In solution, complexes 4 and 6 show 3 MLCT {Re}-based emission at 298 K, which changes to the 3 IL(ppy) state at 77 K. The photophysical properties of compounds 5 and 7 display a pronounced concentration dependence, presumably due to the formation of bimolecular aggregates. Analysis of the spectroscopic data, combined with TD-DFT simulations, suggest that unconventional heteroleptic {Re(phen)}⋅⋅⋅{Pt(dpyb)} π-π stacking operates as the driving force for ground-state association. The latter, together with intra- and intermolecular energy-transfer processes, determines the appearance of multiple emission bands and results in nonlinear relaxation kinetics of the excited states.
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Affiliation(s)
- Kristina S Kisel
- Department of Chemistry, University of Eastern Finland, Yliopistokatu 7, Joensuu, Finland.,Institute of Chemistry, St.-Petersburg State University, 26 Universitetskiy pr., Petergof, St. Petersburg, Russia
| | - Alexei S Melnikov
- Peter the Great St.-Petersburg Polytechnic University, Polytechnicheskaya, 29, St. Petersburg, Russia
| | - Elena V Grachova
- Institute of Chemistry, St.-Petersburg State University, 26 Universitetskiy pr., Petergof, St. Petersburg, Russia
| | - Pipsa Hirva
- Department of Chemistry, University of Eastern Finland, Yliopistokatu 7, Joensuu, Finland
| | - Sergey P Tunik
- Institute of Chemistry, St.-Petersburg State University, 26 Universitetskiy pr., Petergof, St. Petersburg, Russia
| | - Igor O Koshevoy
- Department of Chemistry, University of Eastern Finland, Yliopistokatu 7, Joensuu, Finland
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49
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Kuwabara J, Yamaguchi K, Yamawaki K, Yasuda T, Nishimura Y, Kanbara T. Modulation of the Emission Mode of a Pt(II) Complex via Intermolecular Interactions. Inorg Chem 2017; 56:8726-8729. [DOI: 10.1021/acs.inorgchem.7b00880] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Junpei Kuwabara
- Tsukuba Research
Center for Interdisciplinary Materials Science (TIMS), Graduate School
of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Kaho Yamaguchi
- Tsukuba Research
Center for Interdisciplinary Materials Science (TIMS), Graduate School
of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Kazuma Yamawaki
- Tsukuba Research
Center for Interdisciplinary Materials Science (TIMS), Graduate School
of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Takeshi Yasuda
- Research Center
for Functional Materials, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Yoshinobu Nishimura
- Graduate
School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Takaki Kanbara
- Tsukuba Research
Center for Interdisciplinary Materials Science (TIMS), Graduate School
of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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50
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Suleymanova AF, Eltsov OS, Kozhevnikov DN, Lantushenko AO, Evstigneev MP, Kozhevnikov VN. Measuring Self-Association of Pt Complexes by 195Pt NMR. ChemistrySelect 2017. [DOI: 10.1002/slct.201700506] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Alfiya F. Suleymanova
- Department of Technology for Organic Synthesis; Chemical Technology Institute of Ural Federal University; 620002 Mira str., 19 Yekaterinburg Russian Federation
- I. Postovsky Institute of Organic Synthesis; 620990 S. Kovalevskoy str., 22 Yekaterinburg Russian Federation
| | - Oleg S. Eltsov
- Department of Technology for Organic Synthesis; Chemical Technology Institute of Ural Federal University; 620002 Mira str., 19 Yekaterinburg Russian Federation
| | - Dmitry N. Kozhevnikov
- Department of Technology for Organic Synthesis; Chemical Technology Institute of Ural Federal University; 620002 Mira str., 19 Yekaterinburg Russian Federation
| | | | - Maxim P. Evstigneev
- Department of Physics; Sevastopol State University; Sevastopol Russian Federation
| | - Valery N. Kozhevnikov
- Department of Applied Sciences; Northumbria University, Ellison Building; Newcastle upon Tyne NE1 8ST UK
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