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Ikeshita M, Hara N, Imai Y, Naota T. Chiroptical Response Control of Planar and Axially Chiral Polymethylene-Vaulted Platinum(II) Complexes Bearing 1,1'-Binaphthyl Frameworks. Inorg Chem 2023; 62:13964-13976. [PMID: 37581577 DOI: 10.1021/acs.inorgchem.3c01935] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
In this study, the synthesis, structure, and chiroptical response control of planar chiral polymethylene-vaulted trans-bis[(β-iminomethyl)aryloxy]platinum(II) complexes bearing axially chiral 1,1'-binaphthyl ligands are described. A series of enantiopure polymethylene (n = 4-10)-vaulted complexes were prepared in 6 steps using commercially available (R)- or (S)-BINOL as the starting material without an optical resolution process. The trans-coordination and three-dimensional vaulted structures of the platinum complexes were elucidated from X-ray diffraction (XRD) studies. The complexes were found to show structural dependence of chiroptical responses in the dilute solution state such that the absolute values of [α]D, dissymmetry factors gabs in circular dichroism (CD), and glum in circularly polarized luminescence (CPL) increased upon shortening the length of the polymethylene bridges. The enhanced chiroptical responses were theoretically investigated using density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations, and the results are discussed in terms of the molecular structures and transition dipole moments of the ground states. The structural dependence of the chiroptical responses was ascribed to the distortion of the coordination platforms caused by restriction of the vaulting methylene linkers.
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Affiliation(s)
- Masahiro Ikeshita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
- Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, Narashino, Chiba 275-8575, Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-4-1 Kowakae, Higashi-Osaka, Osaka 577-8502, Japan
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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Inoue R, Naito M, Ehara M, Naota T. Heat‐Resistant Properties in the Phosphorescence oftrans‐Bis[β‐(iminomethyl)aryloxy]platinum(II) Complexes: Effect of Aromaticity on d–π Conjugation Platforms. Chemistry 2019; 25:3650-3661. [DOI: 10.1002/chem.201805785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Indexed: 01/26/2023]
Affiliation(s)
- Ryo Inoue
- Department of ChemistryGraduate School of Engineering ScienceOsaka University Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Masaya Naito
- Department of ChemistryGraduate School of Engineering ScienceOsaka University Machikaneyama Toyonaka, Osaka 560-8531 Japan
| | - Masahiro Ehara
- Institute for Molecular Science (IMS) 38 Nishigo-naka, Myodaiji Okazaki 444-8585 Japan
| | - Takeshi Naota
- Department of ChemistryGraduate School of Engineering ScienceOsaka University Machikaneyama Toyonaka, Osaka 560-8531 Japan
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3
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Anzai K, Kawamorita S, Komiya N, Naota T. Convenient Spectroscopic Method for Quantitative Analysis of Trace Hydrochloric Acid in Chlorinated Organic Solvents Using 2-(1-Adamantylimino)methyl-1 H-pyrrole as a Robust Indicator. CHEM LETT 2017. [DOI: 10.1246/cl.170065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kento Anzai
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531
| | - Soichiro Kawamorita
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531
| | - Naruyoshi Komiya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531
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Leopold H, Strassner T. Phosphorescent Thiazol-2-ylidene Platinum(II) Complexes with β-Ketoiminates: Single Isomer Formation by Ligand Architecture. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00710] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hendrik Leopold
- Physikalische Organische
Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Thomas Strassner
- Physikalische Organische
Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
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Omae I. Application of the five-membered ring blue light-emitting iridium products of cyclometalation reactions as OLEDs. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.08.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Jean S, Cormier K, Patterson AE, Vogels CM, Decken A, Robichaud GA, Turcotte S, Westcott SA. Synthesis, characterization, and anticancer properties of organometallic Schiff base platinum complexes. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0157] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A small family of organometallic platinum complexes containing a chloride, cis-cyclooctene, and a Schiff base ligand have been prepared and characterized fully. Three aliphatic amines and four aromatic amines were chosen as representative examples. All complexes were stable in air except for 7, derived from the pinacol-protected 4-aminophenylboronate ester 4-H2NC6H4Bpin (pin = 1,2-O2C2Me4), which decomposed via B–C bond cleavage. Both complexes 4 (derived from aniline) and 7 were further characterized by single-crystal X-ray diffraction studies and confirmed the square planar nature of the platinum centre whereby the chloride ligand lies trans to the deprotonated hydroxyl group of the Schiff base ligand. The imine functionality is trans to the organic cyclooctene group. Complex 3, which contained the longest aliphatic chain studied (an octyl group), was the most promising for inducing apoptosis in the malignant MB231 breast cancer cell line. Conversely, complexes 4–6, which contained aromatic groups, were the most active against renal cell carcinoma (RCC) cell lines.
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Affiliation(s)
- Stéphanie Jean
- Département de chimie et biochimie, Université de Moncton, Campus de Moncton, Moncton, NB E1A 3E9, Canada
- Atlantic Cancer Research Institute, Moncton, NB E1C 8X3, Canada
| | - Kevin Cormier
- Département de chimie et biochimie, Université de Moncton, Campus de Moncton, Moncton, NB E1A 3E9, Canada
- Atlantic Cancer Research Institute, Moncton, NB E1C 8X3, Canada
| | - Alyssa E. Patterson
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Christopher M. Vogels
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
| | - Andreas Decken
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Gilles A. Robichaud
- Département de chimie et biochimie, Université de Moncton, Campus de Moncton, Moncton, NB E1A 3E9, Canada
- Atlantic Cancer Research Institute, Moncton, NB E1C 8X3, Canada
| | - Sandra Turcotte
- Département de chimie et biochimie, Université de Moncton, Campus de Moncton, Moncton, NB E1A 3E9, Canada
- Atlantic Cancer Research Institute, Moncton, NB E1C 8X3, Canada
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, NB E4L 1G8, Canada
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7
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Huo S, Carroll J, Vezzu DAK. Design, Synthesis, and Applications of Highly Phosphorescent Cyclometalated Platinum Complexes. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500246] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shouquan Huo
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858 USA
| | - Jeffrey Carroll
- Department of Chemistry; East Carolina University; Greenville North Carolina 27858 USA
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Naito M, Souda H, Koori H, Komiya N, Naota T. Binucleartrans-Bis(β-iminoaryloxy)palladium(II) Complexes Doubly Linked with Pentamethylene Spacers: Structure-Dependent Flapping Motion and Heterochiral Association Behavior of the Clothespin-Shaped Molecules. Chemistry 2014; 20:6991-7000. [DOI: 10.1002/chem.201305054] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 03/06/2014] [Indexed: 11/08/2022]
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Gandioso A, Valle-Sistac J, Rodrı́guez L, Crespo M, Font-Bardı́a M. Platinum(II) Compounds Containing Cyclometalated Tridentate Ligands: Synthesis, Luminescence Studies, and a Selective Fluoro for Methoxy Substitution. Organometallics 2014. [DOI: 10.1021/om401111t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Albert Gandioso
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Jennifer Valle-Sistac
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Laura Rodrı́guez
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Margarita Crespo
- Departament de Quı́mica
Inorgànica, Facultat de Quı́mica, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Mercè Font-Bardı́a
- Unitat de Difracció de Raigs-X, Centres Científics
i Tecnològics de la Universitat de Barcelona (CCiTUB), Universitat de Barcelona, Solé i Sabarís, 1-3, 08028 Barcelona, Spain
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Komiya N, Hori T, Naito M, Naota T. Synthesis and Crystal Packing of
trans
‐Bis(2‐aminotroponato)palladium(II) Complexes Bearing Linear Alkyl Chains – Hard Lamellar Structures Self‐Locked by Cross‐Shaped Molecular Units. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naruyoshi Komiya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560‐8531, Japan, http://www.soc.chem.es.osaka‐u.ac.jp/english/index.html
| | - Takao Hori
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560‐8531, Japan, http://www.soc.chem.es.osaka‐u.ac.jp/english/index.html
| | - Masaya Naito
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560‐8531, Japan, http://www.soc.chem.es.osaka‐u.ac.jp/english/index.html
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560‐8531, Japan, http://www.soc.chem.es.osaka‐u.ac.jp/english/index.html
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Komiya N, Itami N, Naota T. Solid-state phosphorescence of trans-bis(salicylaldiminato)platinum(II) complexes bearing long alkyl chains: morphology control towards intense emission. Chemistry 2013; 19:9497-505. [PMID: 23780879 DOI: 10.1002/chem.201301087] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Indexed: 11/08/2022]
Abstract
Morphology control for intense solid-state phosphorescence of non-emissive, but potentially emissive crystals of platinum complexes and the mechanistic rationale are described. A series of trans-bis(salicylaldiminato)platinum(II) complexes bearing linear alkyl chains (1a: n=5; 1b: n=8; 1c: n=12; 1d: n=14; 1e: n=16; 1f: n=18) was synthesized and the solid-state emission properties were examined by using crystals/aggregates prepared under various precipitation conditions. Crystals of 1e, prepared using "kinetic" conditions including rapid cooling, high concentrations, and poor solvents, emit intensive yellow phosphorescence (λ(max)=545 nm) under UV irradiation at 298 K with an absolute quantum efficiency of 0.36, whereas all the crystals of 1a-1f prepared using "thermodynamic" conditions including slow cooling, low concentrations, and good solvents were either non- or less emissive with Φ(298K) values of 0.12 (1a), 0.11 (1b), 0.10 (1c), 0.07 (1d), 0.02 (1e), and 0.02 (1f) under the same measurement conditions. The amorphous solid 1e, prepared by rapid cooling and freeze-drying, was also non-emissive (Φ(298K)=0.02, 0.02). Temperature-dependent emission spectra showed that the kinetic crystals of 1e exhibit high heat-resistance towards emission decay with increasing temperature, whereas the amorphous solid 1e is entirely heat-quenchable. This is a rare example of the change from a non-emissive crystal into a highly emissive crystal by morphology control through crystal engineering. Emission spectra and powder X-ray diffraction (XRD) patterns of the emissive, kinetic crystals of 1e are clearly distinct from those of the less emissive, thermodynamic crystals of 1a-1f. Single-crystal XRD unequivocally establishes that the thermodynamic crystals of 1d have a multilayered lamellar structure supported by highly regulated, consecutive π-stacking interactions between imine moieties, whereas the kinetic crystals of 1e have a face-to-edge lamellar structure with less stacking. These results lead to the conclusion that 1) morphology control of long-chained complexes exclusively generates a metastable herringbone-based lamellar packing motif that exhibits intense emission and high heat-resistance, while 2) a thermodynamically stable, highly regulated, consecutive stacking motif is unfavorable for solid-state emission.
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Affiliation(s)
- Naruyoshi Komiya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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