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Maidich L, Pilo MI, Rourke JP, Clarkson GJ, Canu P, Stoccoro S, Zucca A. Classical vs. Non-Classical Cyclometalated Pt(II) Complexes. Molecules 2022; 27:7249. [PMID: 36364075 PMCID: PMC9654721 DOI: 10.3390/molecules27217249] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 09/10/2023] Open
Abstract
Rollover cyclometalated complexes constitute a family of derivatives which differ from classical cyclometalated species in certain aspects. Various potential application fields have been developed for both classes of compounds, which have both similarities and differences. In order to uncover the relationships and distinctions between these two families of compounds, four Pt(II) cyclometalated complexes derived from 2-phenylpyridine (ppy) and 2,2'-bipyridine (bpy), assumed as prototypical ligands, were compared. For this study, an electron rich isostructural and isoelectronic pair of compounds, [Pt(N^C)Me(PPh3)], and an electron-poorer compound, [Pt(N^C)Cl(PPh3)] were chosen (N^C = ppy or bpy). DFT calculations, cyclic voltammetry, and UV-Vis spectra also helped to shed light into these species. Due to the presence of the more electronegative nitrogen in place of a C-H group, the rollover bpy-H ligand becomes a slightly weaker donor than the classical ppy-H ligand, and hence, generates (slightly) more stable cyclometalated complexes, lower energy frontier molecular orbitals, and electron-poorer platinum centers. On the whole, it was revealed that classical and rollover complexes have overall structural similarity, which contrasts to their somewhat different chemical behavior.
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Affiliation(s)
- Luca Maidich
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Maria I. Pilo
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Jonathan P. Rourke
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Guy J. Clarkson
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Patrizia Canu
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Sergio Stoccoro
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Antonio Zucca
- Department of Chemical, Physical, Mathematical and Natural Sciences, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
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2
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Photophysical Properties and Kinetic Studies of 2-Vinylpyridine-Based Cycloplatinated(II) Complexes Containing Various Phosphine Ligands. Molecules 2021; 26:molecules26072034. [PMID: 33918450 PMCID: PMC8038257 DOI: 10.3390/molecules26072034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 03/21/2021] [Accepted: 03/30/2021] [Indexed: 11/25/2022] Open
Abstract
A series of cycloplatinated(II) complexes with general formula of [PtMe(Vpy)(PR3)], Vpy = 2-vinylpyridine and PR3 = PPh3 (1a); PPh2Me (1b); PPhMe2 (1c), were synthesized and characterized by means of spectroscopic methods. These cycloplatinated(II) complexes were luminescent at room temperature in the yellow–orange region’s structured bands. The PPhMe2 derivative was the strongest emissive among the complexes, and the complex with PPh3 was the weakest one. Similar to many luminescent cycloplatinated(II) complexes, the emission was mainly localized on the Vpy cyclometalated ligand as the main chromophoric moiety. The present cycloplatinated(II) complexes were oxidatively reacted with MeI to yield the corresponding cycloplatinated(IV) complexes. The kinetic studies of the reaction point out to an SN2 mechanism. The complex with PPhMe2 ligand exhibited the fastest oxidative addition reaction due to the most electron-rich Pt(II) center in its structure, whereas the PPh3 derivative showed the slowest one. Interestingly, for the PPhMe2 analog, the trans isomer was stable and could be isolated as both kinetic and thermodynamic product, while the other two underwent trans to cis isomerization.
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Horiuchi S, Tanaka S, Moon S, Sakuda E, Ito A, Arikawa Y, Umakoshi K. A Heteropolynuclear Pt-Ag System Having Cycloplatinated Rollover Bipyridyl Units. Inorg Chem 2021; 60:1513-1522. [PMID: 33444013 DOI: 10.1021/acs.inorgchem.0c02843] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The synthesis and photophysical properties of the heteropolynuclear Pt-Ag complex having cyclometalated rollover bipyridine ligands (bpy*) and bridging pyrazolato ligands are reported. The Pt2Ag2 complex was synthesized by two step reactions from a Pt(II) complex precursor having the rollover bpy* ligand, [Pt(bpy*)(dmso)Cl], with 3,5-dimethylpyrazole (Me2pzH) and a subsequent replacement of NH protons in the Me2pzH moieties with the Ag(I) ion. The Pt2Ag2 complex exists as a mixture of U- and Z-shaped isomers in solution, whose structures were clearly determined by single-crystal X-ray structural analyses. NMR studies using the single crystals revealed rapid isomerization of the Pt2Ag2 complexes in solution, although the Pt2Ag2 structures were supported effectively by the multiple metal-metal interactions. Furthermore, the Pt2Ag2 framework can capture a Ag(I) ion during the U-Z isomerization to afford a Pt2Ag3 core with the formation of Pt → Ag dative bonds. The Pt2Ag3 complex showed further aggregation to form a dimer structure in the presence of coordinating solvent via the crystallization process. The formation of Pt → Ag dative bonds significantly changes the emission energy from the Pt2Ag2 complex, while the emission spectra of U- and Z-isomers of Pt2Ag2 complex almost coincide with each other and their emissive properties are very similar. The density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations revealed the effects of additional Ag(I) ion on the photophysical properties of the heteropolynuclear Pt-Ag complexes bearing the rollover bpy* ligands.
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Affiliation(s)
- Shinnosuke Horiuchi
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Seiya Tanaka
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Sangjoon Moon
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Eri Sakuda
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Akitaka Ito
- Graduate School of Engineering, Kochi University of Technology, 185, Miyanokuchi, Tosayamada, Kami, Kochi 782-1502, Japan
| | - Yasuhiro Arikawa
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
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Zucca A, Pilo MI. Rollover Cyclometalation as a Valuable Tool for Regioselective C-H Bond Activation and Functionalization. Molecules 2021; 26:E328. [PMID: 33435257 PMCID: PMC7827749 DOI: 10.3390/molecules26020328] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 01/31/2023] Open
Abstract
Rollover cyclometalation constitutes a particular case of cyclometallation reaction. This reaction occurs when a chelated heterocyclic ligand loses its bidentate coordination mode and undergoes an internal rotation, after which a remote C-H bond is regioselectively activated, affording an uncommon cyclometalated complex, called "rollover cyclometalated complex". The key of the process is the internal rotation of the ligand, which occurs before the C-H bond activation and releases from coordination a donor atom. The new "rollover" ligand has peculiar properties, being a ligand with multiple personalities, no more a spectator in the reactivity of the complex. The main reason of this peculiarity is the presence of an uncoordinated donor atom (the one initially involved in the chelation), able to promote a series of reactions not available for classic cyclometalated complexes. The rollover reaction is highly regioselective, because the activated C-H bond is usually in a symmetric position with respect to the donor atom which detaches from the metal stating the rollover process. Due to this novel behavior, a series of potential applications have appeared in the literature, in fields such as catalysis, organic synthesis, and advanced materials.
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Affiliation(s)
- Antonio Zucca
- Department of Chemistry and Pharmacy, University of Sassari, via Vienna 2, 07100 Sassari, Italy;
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Bavi M, Nabavizadeh SM, Hosseini FN, Niknam F, Hamidizadeh P, Hoseini SJ, Raoof F, Abu-Omar MM. Ligand-Mediated C-Br Oxidative Addition to Cycloplatinated(II) Complexes and Benzyl-Me C-C Bond Reductive Elimination from a Cycloplatinated(IV) Complex. ACS OMEGA 2020; 5:28621-28631. [PMID: 33195914 PMCID: PMC7658948 DOI: 10.1021/acsomega.0c03573] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023]
Abstract
Reaction of the Pt(II) complexes [PtMe2(pbt)], 1a, (pbt = 2-(2-pyridyl)benzothiazole) and [PtMe(C^N)(PPh2Me)] [C^N = deprotonated 2-phenylpyridine (ppy), 1b, or deprotonated benzo[h]quinoline (bhq), 1c] with benzyl bromide, PhCH2Br, is studied. The reaction of 1a with PhCH2Br gave the Pt(IV) product complex [PtBr(CH2Ph)Me2(pbt)]. The major trans isomer is formed in a trans oxidative addition (2a), while the minor cis products (2a' and 2a″) resulted from an isomerization process. A solution of Pt(II) complex 1a in the presence of benzyl bromide in toluene at 70 °C after 7 days gradually gave the dibromo Pt(IV) complex [Pt(Br)2Me2(pbt)], 4a, as determined by NMR spectroscopy and single-crystal XRD. The reaction of complexes 1b and 1c with PhCH2Br gave the Pt(IV) complexes [PtMeBr(CH2Ph)(C^N)(PPh2Me)] (C^N = ppy; 2b; C^N = bhq, 2c), in which the phosphine and benzyl ligands are trans. Multinuclear NMR spectroscopy ruled out other isomers. Attempts to grow crystals of the cycloplatinated(IV) complex 2b yielded a previously reported Pt(II) complex [PtBr(ppy)(PPh2Me)], 3b, presumably from reductive elimination of ethylbenzene. UV-vis spectroscopy was used to study the kinetics of reaction of Pt(II) complexes 1a-1c with benzyl bromide. The data are consistent with a second-order SN2 mechanism and the first order in both the Pt complex and PhCH2Br. The rate of reaction decreases along the series 1a ≫ 1c > 1b. Density functional theory calculations were carried out to support experimental findings and understand the formation of isomers.
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Affiliation(s)
- Marzieh Bavi
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - S. Masoud Nabavizadeh
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | | | - Fatemeh Niknam
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Peyman Hamidizadeh
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - S. Jafar Hoseini
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Fatemeh Raoof
- Professor Rashidi
Laboratory of Organometallic Chemistry, Department of Chemistry, College
of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Mahdi M. Abu-Omar
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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Jamshidi M, Barzegar-Kiadehi SR, Golbon Haghighi M, Notash B. Dual-Emissive Bis(diphenylphosphino)amine Platinum Complexes: Structural, Reactivity, Photophysical, and Theoretical Investigations. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00301] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mahboubeh Jamshidi
- Department of Chemistry, Shahid Beheshti University, Evin, Tehran 19839-69411, Iran
- Institut für Physikalische und Theoretische Chemie, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany
| | | | | | - Behrouz Notash
- Department of Chemistry, Shahid Beheshti University, Evin, Tehran 19839-69411, Iran
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7
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The history of organoplatinum chemistry in Iran: 40-year research. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01892-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Synthesis, structural characterization, and luminescence properties of mono- and di-nuclear platinum(II) complexes containing 2-(2-pyridyl)-benzimidazole. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Nabavizadeh SM, Niroomand Hosseini F, Niknam F, Hamidizadeh P, Hoseini SJ, Ford PC, Abu-Omar MM. Chelating and Bridging Roles of 2-(2-Pyridyl)benzimidazole and Bis(diphenylphosphino)acetylene in Stabilizing a Cyclic Tetranuclear Platinum(II) Complex. Inorg Chem 2019; 58:14608-14616. [PMID: 31613604 DOI: 10.1021/acs.inorgchem.9b02274] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The reaction of complex [Pt(Me)(DMSO)(pbz)], 1, (pbz = 2-(2-pyridyl)benzimidazolate) with [PtMe(Cl)(DMSO)2], B, followed by addition of bis(diphenylphosphino)acetylene (dppac), gave the novel tetranuclear platinum complex [Pt4Me4(μ-dppac)2(pbz)2Cl2], 2, bearing both the pbz and dppac ligands. In this structure, the pbz ligands are both chelating and bridging to stabilize the tetraplatinum framework. The tetranuclear Pt(II) complex was fully characterized by NMR spectroscopy, X-ray crystallography, and mass spectrometry, and its electronic structure was investigated and supported by DFT calculations.
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Affiliation(s)
- S Masoud Nabavizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences , Shiraz University , Shiraz 71467-13565 , Iran.,Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
| | | | - Fatemeh Niknam
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences , Shiraz University , Shiraz 71467-13565 , Iran
| | - Peyman Hamidizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences , Shiraz University , Shiraz 71467-13565 , Iran
| | - S Jafar Hoseini
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences , Shiraz University , Shiraz 71467-13565 , Iran
| | - Peter C Ford
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
| | - Mahdi M Abu-Omar
- Department of Chemistry and Biochemistry , University of California , Santa Barbara , California 93106 , United States
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10
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Nikahd S, Babadi Aghakhanpour R, Nabavizadeh SM, Niroomand Hosseini F, Hoseini SJ, Pfitzner A, Samandar Sangari M. Luminescent mononuclear and dinuclear cycloplatinated (II) complexes comprising azide and phosphine ancillary ligands. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sahebeh Nikahd
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of SciencesShiraz University Shiraz 71467‐13565 Iran
| | | | - S. Masoud Nabavizadeh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of SciencesShiraz University Shiraz 71467‐13565 Iran
| | | | - S. Jafar Hoseini
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of SciencesShiraz University Shiraz 71467‐13565 Iran
| | - Arno Pfitzner
- Institut für Anorganische ChemieUniversität Regensburg 93040 Regensburg Germany
| | - Mozhgan Samandar Sangari
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of SciencesShiraz University Shiraz 71467‐13565 Iran
- Institut für Anorganische ChemieUniversität Regensburg 93040 Regensburg Germany
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11
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Nazari M, Shahsavari HR. Strong red emissions induced by Pt–Pt interactions in binuclear cycloplatinated(II) complexes containing bridging diphosphines. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Morteza Nazari
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137‐66731 Iran
| | - Hamid R. Shahsavari
- Department of ChemistryInstitute for Advanced Studies in Basic Sciences (IASBS) Zanjan 45137‐66731 Iran
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12
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Shahsavari HR, Giménez N, Lalinde E, Moreno MT, Fereidoonnezhad M, Babadi Aghakhanpour R, Khatami M, Kalantari F, Jamshidi Z, Mohammadpour M. Heterobimetallic PtII
-AuI
Complexes Comprising Unsymmetrical 1,1-Bis(diphenylphosphanyl)methane Bridges: Synthesis, Photophysical, and Cytotoxic Studies. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801297] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - 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
| | - M. Teresa Moreno
- Departamento de Química-Centro de Síntesis Química de La Rioja (CISQ); Universidad de La Rioja; 26006 Logroño Spain
| | - Masood Fereidoonnezhad
- Toxicology Research Center; Ahvaz Jundishapur University of Medical Sciences; Ahvaz Iran
- Department of Medicinal Chemistry; Student Research Committee; Ahvaz Jundishapur University of Medical Sciences; Ahvaz Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Mehri Khatami
- Department of Chemistry; Institute for Advanced Studies in Basic Sciences (IASBS); 45137-66731 Zanjan Iran
| | - Foroogh Kalantari
- Department of Medicinal Chemistry; Student Research Committee; Ahvaz Jundishapur University of Medical Sciences; Ahvaz Iran
| | - Zahra Jamshidi
- Student Research Committee; Chemistry & Chemical Engineering Research Center of Iran; 14968-13151 Tehran Iran
| | - Mozhdeh Mohammadpour
- Student Research Committee; Chemistry & Chemical Engineering Research Center of Iran; 14968-13151 Tehran Iran
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13
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Paziresh S, Babadi Aghakhanpour R, Fuertes S, Sicilia V, Niroomand Hosseini F, Nabavizadeh SM. A double rollover cycloplatinated(ii) skeleton: a versatile platform for tuning emission by chelating and non-chelating ancillary ligand systems. Dalton Trans 2019; 48:5713-5724. [PMID: 30968899 DOI: 10.1039/c9dt00807a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Described here is the synthesis and characterization of heteroleptic binuclear platinum(ii) complexes of the type [Pt2(μ-bpy-2H)(S^S)2] and [Pt2(μ-bpy-2H)(L)2(X)2], containing a 2,2'-bipyridine-based double rollover cycloplatinated core (Pt(μ-bpy-2H)Pt), in combination with the anionic S^S- chelate ligands di(ethyl)dithiocarbamate (dedtc) and O,O'-di(cyclohexyl)dithiophosphate (dcdtp) or non-chelating L/X ancillary ligands (PPh3/Me, t-BuNC/Me, PPh3/SCN and PPh3/N3). The new complexes were characterized using multinuclear (1H, 31P and 195Pt) NMR spectroscopy and some of them additionally using single crystal X-ray diffraction. The absorption and photoluminescence of the complexes show a strong dependence on the ancillary ligands. Upon excitation at 365 nm, in a CH2Cl2 rigid matrix (77 K), the complexes exhibit structured emission bands with λmax between 488 nm and 525 nm and vibrational spacing around 1350 cm-1, indicating the excited states centered on the cyclometalated ligand (3ILCT) with some mixing 3MLCT characteristics. In the case of the PPh3/N3 complex, a dual emission band (orange color) is observed in the solid state at 298 K for which the low energy band arises from an aggregation-induced emission (AIE). Upon lowering the temperature (77 K), thermochromism is observed (orange to yellow) which is accompanied by the intensification of the high energy band (ligand-centered structured band). Finally, in order to rationalize the obtained photophysical data, complete DFT (density functional theory) and TD-DFT (time-dependent DFT) calculations were performed on the selected complexes.
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Affiliation(s)
- Sareh Paziresh
- Professor Rashidi Laboratory of Organometallic Chemistry, Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 71454, Iran.
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14
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Shahsavari HR, Babadi Aghakhanpour R, Nikravesh M, Ozdemir J, Golbon Haghighi M, Notash B, Beyzavi H. Highly Emissive Cycloplatinated(II) Complexes Obtained by the Chloride Abstraction from the Complex [Pt(ppy)(PPh3)(Cl)]: Employing Various Silver Salts. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00461] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - Mahshid Nikravesh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran
| | - John Ozdemir
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
| | | | - Behrouz Notash
- Department of Chemistry, Shahid Beheshti University, Evin, Tehran 19839-69411, Iran
| | - Hudson Beyzavi
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, Arkansas 72701, United States
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15
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Tovar-Ramírez ME, Ramírez-Zúńiga R, Nicasio-Collazo J, Wrobel K, Alvarado-Rodríguez JG, Wrobel K, Serrano O. Rollover Cyclopalladation via Remote C-H Bond Activation of Br-Pyridinbenzothiazole: An Experimental Study. ChemistrySelect 2018. [DOI: 10.1002/slct.201703079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin E. Tovar-Ramírez
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
| | - Rosario Ramírez-Zúńiga
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
| | - Juan Nicasio-Collazo
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
| | - Katarzyna Wrobel
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
| | - José G. Alvarado-Rodríguez
- Centro de Investigaciones Químicas; Universidad Autónoma del Estado de Hidalgo; Unidad Universitaria; km 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma Hidalgo. C.P. 42184
| | - Kazimierz Wrobel
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
| | - Oracio Serrano
- Departamento de Química; Sede Pueblito de Rocha; Universidad de Guanajuato; Cerro de la Venada s/n, Pueblito de Rocha; Guanajuato Gto. 36040
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16
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Paziresh S, Babadi Aghakhanpour R, Rashidi M, Nabavizadeh SM. Simple tuning of the luminescence properties of the double rollover cycloplatinated(ii) structure by halide ligands. NEW J CHEM 2018. [DOI: 10.1039/c7nj03817h] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The luminescence properties of double rollover cycloplatinated(ii) complexes and the effects of halogen ligands on the luminescence properties are investigated.
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Affiliation(s)
- Sareh Paziresh
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Yousef Sobouti Blvd
- Zanjan 45137-66731
- Iran
| | - Mehdi Rashidi
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
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17
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Shahsavari HR, Babadi Aghakhanpour R, Hossein-Abadi M, Kia R, Halvagar MR, Raithby PR. Reactivity of a new aryl cycloplatinated(ii) complex containing rollover 2,2′-bipyridine N-oxide toward a series of diphosphine ligands. NEW J CHEM 2018. [DOI: 10.1039/c8nj00713f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new rollover cycloplatinated(ii) complex was prepared. The reactivity of this complex was investigated towards a wide range of diphosphine ligands.
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Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Mojdeh Hossein-Abadi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Reza Kia
- Chemistry Department
- Sharif University of Technology
- Tehran
- Iran
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18
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Fereidoonnezhad M, Niazi M, Shahmohammadi Beni M, Mohammadi S, Faghih Z, Faghih Z, Shahsavari HR. Synthesis, Biological Evaluation, and Molecular Docking Studies on the DNA Binding Interactions of Platinum(II) Rollover Complexes Containing Phosphorus Donor Ligands. ChemMedChem 2017; 12:456-465. [PMID: 28195406 DOI: 10.1002/cmdc.201700007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Revised: 02/12/2017] [Indexed: 12/21/2022]
Abstract
Cyclometalated rollover complexes of the type [PtMe(κ2 N,C-bipyO-H)(L)] [bipyO-H=cyclometalated 2,2'-bipyridine N-oxide; L=tricyclohexylphosphine (PCy3 , 2 a), 2-(diphenylphosphino)pyridine (PPh2 py, 2 b), P(OPh)3 (2 c)] were synthesized by treating [PtMe(κ2 N,C-bipyO-H)(SMe2 )] (1) with various monodentate phosphine and phosphite ligands. These complexes were characterized by NMR spectroscopy, and the structure of 2 a was confirmed by single-crystal X-ray diffraction. Complex 1 was treated with bis(diphenylphosphino)methane (dppm) at a 1:1 ratio to give the corresponding [PtMe(κ2 N,C-bipyO-H)(κ1 P-dppm)] (3 b) complex, in which the dppm ligand acts as a monodentate pendant ligand. The biological activities of these complexes were evaluated against a panel of four standard cancer cell lines: lung carcinoma (A549), ovarian carcinoma (OV-90 and SKOV3), and breast carcinoma (MCF-7). Complexes 2 c and especially 3 b indicated effective potent cytotoxic activity regarding the cell lines. Electrophoresis mobility shift assays and molecular-modeling investigations were performed to determine the specific binding mode and the binding orientation of these alkylating agents to DNA. Detection of cellular reactive oxygen species was also determined.
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Affiliation(s)
- Masood Fereidoonnezhad
- Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cancer, Environmental and Petroleum Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Niazi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan, 45137-6731, Iran
| | - Mahnaz Shahmohammadi Beni
- Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Shima Mohammadi
- Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Zeinab Faghih
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Zahra Faghih
- Shiraz Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hamid R Shahsavari
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Yousef Sobouti Blvd., Zanjan, 45137-6731, Iran
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19
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Shahsavari HR, Babadi Aghakhanpour R, Babaghasabha M, Golbon Haghighi M, Nabavizadeh SM, Notash B. Photophysical properties of a series of cycloplatinated(ii) complexes featuring allyldiphenylphosphane. NEW J CHEM 2017. [DOI: 10.1039/c7nj00055c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cycloplatinated(ii) complexes 1–4 were synthesized and characterized. All complexes exhibit strong luminescence except 3.
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Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
- Department of Chemistry
| | - Mojgan Babaghasabha
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
| | | | | | - Behrouz Notash
- Department of Chemistry
- Shahid Beheshti University
- Tehran 19839-69411
- Iran
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20
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Sangari MS, Haghighi MG, Nabavizadeh SM, Kubicki M, Rashidi M. Photophysical study on unsymmetrical binuclear cycloplatinated(ii) complexes. NEW J CHEM 2017. [DOI: 10.1039/c7nj03034g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A general synthetic method has been designed to prepare a new series of unsymmetrical binuclear cyclometalated organoplatinum(ii) complexes and the effect of each part on their luminescence properties were investigated.
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Affiliation(s)
| | | | | | - Maciej Kubicki
- Faculty of Chemistry
- Adam Mickiewicz University
- 61-614 Poznan
- Poland
| | - Mehdi Rashidi
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz 71467-13565
- Iran
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21
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Shahsavari HR, Babadi Aghakhanpour R, Hossein-Abadi M, Golbon Haghighi M, Notash B, Fereidoonnezhad M. A new approach to the effects of isocyanide (CN-R) ligands on the luminescence properties of cycloplatinated(ii) complexes. NEW J CHEM 2017. [DOI: 10.1039/c7nj03110f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cycloplatinated complexes bearing isocyanides were prepared and characterized. The complexes exhibited strong luminescence while the nature of R substituents in isocyanides affected the luminescence characteristics.
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Affiliation(s)
- Hamid R. Shahsavari
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Reza Babadi Aghakhanpour
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Mojdeh Hossein-Abadi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | | | - Behrouz Notash
- Department of Chemistry
- Shahid Beheshti University
- Tehran 19839-69411
- Iran
| | - Masood Fereidoonnezhad
- Department of Medicinal Chemistry
- School of Pharmacy; Cancer
- Environmental and Petroleum Pollutants Research Center
- Ahvaz Jundishapur University of Medical Sciences
- Ahvaz
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22
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Molaee H, Nabavizadeh SM, Jamshidi M, Vilsmeier M, Pfitzner A, Samandar Sangari M. Phosphorescent heterobimetallic complexes involving platinum(iv) and rhenium(vii) centers connected by an unsupported μ-oxido bridge. Dalton Trans 2017; 46:16077-16088. [DOI: 10.1039/c7dt03126b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Heterobimetallic compounds containing an unsupported Pt(iv)–O–Re(vii) bridge are synthesized. The complexes exhibit rare phosphorescence emission in solid and frozen states.
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Affiliation(s)
- Hajar Molaee
- Department of Chemistry
- College of Sciences
- Shiraz University
- Shiraz
- Iran
| | | | | | - Max Vilsmeier
- Institut für Anorganische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
| | - Arno Pfitzner
- Institut für Anorganische Chemie
- Universität Regensburg
- 93040 Regensburg
- Germany
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