1
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Mochizuki T, Yoshida M, Kobayashi A, Kato M. Controlled crystallisation of porous crystals of luminescent platinum(II) complexes by electronic tuning of ancillary ligands. Dalton Trans 2024. [PMID: 38616678 DOI: 10.1039/d4dt00713a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Porous molecular crystals (PMCs) have gained significant importance as next-generation functional porous materials. However, the selective crystallisation of the PMC phase remains a challenge. Herein, we have systematically controlled the stability of the luminescent PMC phase prepared using the luminescent Pt(II) complex [Pt(pbim)(N^O)] (pbim = 2-phenylbenzimidazolate, N^O = N-heteroaryl carboxylate) with Pt⋯Pt electronic interactions. The PMC phase formation varied significantly among the complexes depending on the heteroaryl group of the ancillary N^O ligand; the oxazolyl-bearing complex did not form a PMC phase, whereas the pyrazyl- and 5-fluoropyridyl-bearing complexes spontaneously formed a porous structure. This difference was rationalised by the π-stacking capability of the heteroaryl group of the ancillary ligand. Furthermore, owing to the presence of the one-dimensional Pt⋯Pt chains in this PMC phase, the photophysical properties of PMCs resulting from the Pt⋯Pt interactions were also significantly changed by the ancillary ligands.
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Affiliation(s)
- Takanari Mochizuki
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Yoshida
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
| | - Atsushi Kobayashi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masako Kato
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
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2
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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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3
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Makino Y, Yoshida M, Hayashi S, Sasaki T, Takamizawa S, Kobayashi A, Kato M. Elastic and bright assembly-induced luminescent crystals of platinum(II) complexes with near-unity emission quantum yield. Dalton Trans 2023. [PMID: 36847788 DOI: 10.1039/d3dt00192j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Molecular crystals of Pt(II) complexes with metallophilic interactions can provide bright assembly-induced luminescence with colour tunability. However, the brittleness of many of these crystals makes their application in flexible optical materials difficult. Herein, we have achieved the elastic deformation of crystals of polyhalogenated Pt(II) complexes exhibiting bright assembly-induced luminescence. A crystal of [Pt(bpic)(dFppy)] (Hbpic = 5-bromopicolinic acid, HdFppy = 2-(2,4-difluorophenyl)pyridine) and a co-crystal of [Pt(bpic)(dFppy)] and [Pt(bpic)(ppy)] (Hppy = 2-phenylpyridine) were found to exhibit significant elastic deformation due to their highly anisotropic interaction topologies. While the crystal of [Pt(bpic)(dFppy)] exhibited monomer-based ligand-centred 3ππ* emission with an emission quantum yield of 0.40, the co-crystal exhibited bright, triplet metal-metal-to-ligand charge transfer (3MMLCT) emission owing to Pt⋯Pt interactions, thereby achieving a significantly higher emission quantum yield of 0.94.
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Affiliation(s)
- Yusuke Makino
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Yoshida
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.,Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
| | - Shotaro Hayashi
- School of Environmental Science and Engineering and Research Centre for Molecular Design, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Toshiyuki Sasaki
- Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Satoshi Takamizawa
- Department of Materials System Science, Yokohama City University, 22-2 Seto, Kanazawa-ku, Yokohama, Kanagawa 236-0027, Japan
| | - Atsushi Kobayashi
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masako Kato
- Department of Chemistry, Faculty of Science, Hokkaido University, North-10 West-8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan.,Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, 1 Gakuen-Uegahara, Sanda, Hyogo 669-1330, Japan.
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4
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Gómez de Segura D, Lalinde E, Moreno MT. Polymorphism and Mechanochromism in 2-Phenylbenzothiazole Cyclometalated Pt II Complexes with Chelating N ∧O Ligands. Inorg Chem 2022; 61:20043-20056. [PMID: 36442499 DOI: 10.1021/acs.inorgchem.2c03423] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
New cyclometalated PtII complexes with 2-phenylbenzothiazole (pbt) and two different picolinate ligands [Pt(pbt)(R-pic-κN,O)] (R = H (1), OH (2)) were prepared. In contrast to 1, the OH substituent group on 2 allows modulation of the packing in the solid state through donor-acceptor H-bonding interactions with the CH2Cl2 solvent. Thus, three pseudopolymorphs of 2 with different aggregation degrees were isolated, including yellow 2-Y, orange-red 2-R (2·0.5CH2Cl2) and black 2-B (2·0.75CH2Cl2) with emissions at 540, 656, and 740 nm, respectively, in the solid state at 298 K. 2-R and 2-B can be transformed to the pristine solid 2. Studies of their crystal structures show that 1 and 2-Y stack in columns with only π···π stacking interactions, whereas 2-R displays strong aggregated 1D infinite chains based on Pt···Pt and π···π stacking interactions, consistent with the colors and the photophysical properties, measured in several media. Interestingly, 1 and 2 exhibit reversible mechanochromic behavior with high contrast in the color and color emission upon mechanical grinding due to a phase transition between a crystalline and an amorphous state, as confirmed by powder X-ray diffraction (PXRD) studies. Theoretical calculations indicate that Pt···Pt contacts are more relevant in the trimers and tetramers than in the dimers, particularly in their T1 states, associated with a change from a 3IL/3MLCT transition in the monomer to 3MM(L+L')CT in the oligomers. Noncovalent interaction (NCI) theoretical studies indicate that the π···π stacking among chelates also exerts a strong influence in the metal-metal-to-ligand charge transfer transition character.
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Affiliation(s)
- David Gómez de Segura
- 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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5
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Sokolova E, Kinzhalov MA, Smirnov AS, Cheranyova AM, Ivanov DM, Kukushkin VY, Bokach NA. Polymorph-Dependent Phosphorescence of Cyclometalated Platinum(II) Complexes and Its Relation to Non-covalent Interactions. ACS OMEGA 2022; 7:34454-34462. [PMID: 36188282 PMCID: PMC9520548 DOI: 10.1021/acsomega.2c04110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
Cyclometalated platinum(II) complexes [Pt(ppy)Cl(CNAr)] (ppy = 2-phenylpyridinato-C2,N; Ar = C6H4-2-I 1, C6H4-4-I 2, C6H3-2-F-4-I 3, and C6H3-2,4-I2 4) bearing ancillary isocyanide ligands were obtained by the bridge-splitting reaction between the dimer [Pt(ppy)(μ-Cl)]2 and 2 equiv any one of the corresponding CNAr. Complex 2 was crystallized in two polymorphic forms, namely, 2 I and 2 II, exhibiting green (emission quantum yield of 0.5%) and orange (emission quantum yield of 12%) phosphorescence, respectively. Structure-directing non-covalent contacts in these polymorphs were verified by a combination of experimental (X-ray diffraction) and theoretical methods (NCIplot analysis, combined electron localization function (ELF), and Bader quantum theory of atoms in molecules (QTAIM analysis)). A noticeable difference in the spectrum of non-covalent interactions of 2 I and 2 II is seen in the Pt···Pt interactions in 2 II and absence of these metallophilic contacts in 2 I. The other solid luminophores, namely, 1, 3 I-II, 4, and 4·CHCl3, exhibit green luminescence; their structures include intermolecular C-I···Cl-Pt halogen bonds as the structure-directing interactions. Crystals of 1, 2 I, 3 I, 3 II, 4, and 4·CHCl3 demonstrated a reversible mechanochromic color change achieved by mechanical grinding (green to orange) and solvent adsorption (orange to green).
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Affiliation(s)
- Elina
V. Sokolova
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Mikhail A. Kinzhalov
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- Research
School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian
Federation
| | - Andrey S. Smirnov
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Anna M. Cheranyova
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Daniil M. Ivanov
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- Research
School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian
Federation
| | - Vadim Yu. Kukushkin
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- Institute
of Chemistry and Pharmaceutical Technologies, Altai State University, Barnaul 656049, Russian Federation
| | - Nadezhda A. Bokach
- Saint
Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
- Research
School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Tomsk 634050, Russian
Federation
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6
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Ohno K, Shiraishi K, Sugaya T, Nagasawa A, Fujihara T. Cyclometalated Platinum(II) Complexes in a Cis- N, N Configuration: Photophysical Properties and Isomerization to Trans Isomers. Inorg Chem 2022; 61:3420-3433. [PMID: 35156820 DOI: 10.1021/acs.inorgchem.1c03295] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Synthesis, isomerization, and photophysical properties of novel cis-N,N-cyclometalated complexes [Pt(C∧N)(l-Phe)] (C∧N = benzoquinolinate (1), phenylpyridinate (2), 2-(p-tolyl)pyridinate (3), and 1-phenylpyrazolate (4); l-Phe- = l-phenylalaninate) are reported herein. In solution, the cis forms of the complexes isomerize to their trans forms via an associative mechanism. This cis/trans isomerism barely influences the absorption and luminescence properties of the complexes in solution, except for a characteristic absorption at approximately 340 nm in the absorption spectra of the cis complexes that is not observed for the trans complexes. Interestingly, the cis complexes are spontaneously assembled in a crystalline phase and show bathochromic absorption and emission colors compared with those of the corresponding trans isomers, which are aggregated in an amorphous phase. cis-1 and cis-2 demonstrate hypsochromic luminescence mechanochromism. The influence of the geometrical isomerism on the photophysical properties and the isomerization mechanism are supported by density functional theory calculations.
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Affiliation(s)
- Keiji Ohno
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University, 2-8-1 Mejirodai, Bunkyo-ku, Tokyo 112-8681, Japan
| | - Kazuki Shiraishi
- Department of Chemistry, Graduate School of Science and Engineering, Saitama University, 255 Shimo-Okubo, Sakuraku, Saitama 338-8570, Japan
| | - Tomoaki Sugaya
- Education Center, Faculty of Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan.,Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Okubo, Shinjuku-ku, Tokyo 169-8555, 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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7
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Zhang Q, Wang S, Zhu Y, Zhang C, Cao H, Ma W, Tian X, Wu J, Zhou H, Tian Y. Functional Platinum(II) Complexes with Four-Photon Absorption Activity, Lysosome Specificity, and Precise Cancer Therapy. Inorg Chem 2021; 60:2362-2371. [PMID: 33494602 DOI: 10.1021/acs.inorgchem.0c03245] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Multiphoton materials are in special demand in the field of photodynamic therapy and multiphoton fluorescence imaging. However, rational design methodology for these brands of materials is still nascent. This is despite transition-metal complexes favoring optimized nonlinear-optical (NLO) activity and heavy-atom-effected phosphorescent emission. Here, three four-photon absorption (4PA) platinum(II) complexes (Pt1-Pt3) are achieved by the incorporation of varied functionalized C^N^C ligands with high yields. Pt1-Pt3 exhibit triplet metal-to-ligand charge-transfer transitions at ∼460 nm, which are verified multiple times by transient absorption spectra, time-dependent density functional theory calculations, and low-temperature emission spectra. Further, Pt1-Pt3 undergo 4PA. Notably, one of the complexes, Pt2, has maximum 4PA cross-sectional values of up to 15.2 × 10-82 cm8 s3 photon-3 under excitation of a 1600 nm femtosecond laser (near-IR II window). The 4PA cross sections vary when Pt2 is binding to lecithin and when it displays its lysosome-specific targeting behavior. On the basis of the excellent 4PA property of Pt2, we believe that those 4PA platinum(II) complexes have great potential applications in cancer theranostics.
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Affiliation(s)
- Qiong Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Shujing Wang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Yingzhong Zhu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Chengkai Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Hongzhi Cao
- School of Life Science, Anhui University, Hefei 230601, P. R. China
| | - Wen Ma
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Xiaohe Tian
- School of Life Science, Anhui University, Hefei 230601, P. R. China
| | - Jieying Wu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Hongping Zhou
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
| | - Yupeng Tian
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230601, P. R. China
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8
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Handedness-inverted polymorphic helical assembly and circularly polarized luminescence of chiral platinum complexes. Sci China Chem 2021. [DOI: 10.1007/s11426-020-9911-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Zhang X, Wang D, Shen H, Wang S, Zhou Y, Lei Y, Gao W, Liu M, Huang X, Wu H. 3,6-Diamino-7,8-dihydroisoquinoline-4-carbonitrile derivatives: unexpected facile synthesis, full-color-tunable solid-state emissions and mechanofluorochromic activities. Org Chem Front 2021. [DOI: 10.1039/d0qo01527j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A facile synthesis of novel 3,6-diamino-7,8-dihydroisoquinoline-4-carbonitrile derivatives and their solid-state emissions are presented.
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Affiliation(s)
- Xinyu Zhang
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Dan Wang
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Hao Shen
- Bureau Veritas Consummer Products Services Shenou (Wenzhou) Co. Ltd
- Wenzhou
- 325035
- P. R. China
| | - Shuxian Wang
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Yunbing Zhou
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Yunxiang Lei
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Wenxia Gao
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Miaochang Liu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Xiaobo Huang
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
| | - Huayue Wu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- P. R. China
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10
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Zhang X, Zhou Y, Wang M, Chen Y, Zhou Y, Gao W, Liu M, Huang X, Wu H. Metal‐Free Facile Synthesis of Multisubstituted 1‐Aminoisoquinoline Derivatives with Dual‐State Emissions. Chem Asian J 2020; 15:1692-1700. [DOI: 10.1002/asia.202000322] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/05/2020] [Indexed: 01/02/2023]
Affiliation(s)
- Xinyu Zhang
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Yibin Zhou
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Mengzhu Wang
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Yating Chen
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Yunbing Zhou
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Wenxia Gao
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Miaochang Liu
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Xiaobo Huang
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
| | - Huayue Wu
- College of Chemistry and Materials EngineeringWenzhou University Wenzhou 325035 P. R. China
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11
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Ohno K, Komuro M, Sugaya T, Nagasawa A, Fujihara T. Luminescence of mononuclear Pt(ii) complexes with glycolate: external stimuli-induced excimer emission changes to oligomer emissions. Dalton Trans 2020; 49:1873-1882. [PMID: 31967145 DOI: 10.1039/c9dt03996a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Trihydrate crystals of novel PtII complexes [PtII(bpy)(gl)] (bpy: 2,2′-bipyridine; Hgl−: glycolate) show excimer emission changes to two kinds of oligomer emissions depending on the type of external stimuli.
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Affiliation(s)
- Keiji Ohno
- Department of Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama 338-8570
- Japan
| | - Masaya Komuro
- Department of Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama 338-8570
- Japan
| | - Tomoaki Sugaya
- Education Center
- Faculty of Engineering
- Chiba Institute of Technology
- Narashino
- Japan
| | - Akira Nagasawa
- Department of Chemistry
- Graduate School of Science and Engineering
- Saitama University
- Saitama 338-8570
- Japan
| | - Takashi Fujihara
- Comprehensive Analysis Center for Science
- Saitama University
- Saitama 338-8570
- Japan
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12
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Fang B, Zhu Y, Hu L, Shen Y, Jiang G, Zhang Q, Tian X, Li S, Zhou H, Wu J, Tian Y. Series of C^N^C Cyclometalated Pt(II) Complexes: Synthesis, Crystal Structures, and Nonlinear Optical Properties in the Near-Infrared Region. Inorg Chem 2018; 57:14134-14143. [DOI: 10.1021/acs.inorgchem.8b01967] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Bin Fang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yingzhong Zhu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Lei Hu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yu Shen
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Guoqing Jiang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Qiong Zhang
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Xiaohe Tian
- School of Life Science, Anhui University, Hefei 230039, China
| | - Shengli Li
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Hongping Zhou
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Jieying Wu
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
| | - Yupeng Tian
- Department of Chemistry, Key Laboratory of Functional Inorganic Material Chemistry of Anhui Province, Anhui University, Hefei 230039, China
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13
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Marcos I, Ojea V, Vázquez-García D, Fernández JJ, Fernández A, López-Torres M, Lado J, Vila JM. Preparation and characterization of terdentate [C,N,N] acetophenone and acetylpyridine hydrazone platinacycles: a DFT insight into the reaction mechanism. Dalton Trans 2017; 46:16845-16860. [PMID: 29171854 DOI: 10.1039/c7dt03418k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of N-ortho-chlorophenyl-substituted acetylpyridine hydrazones (a and d) with K2[PtCl4] (n-butanol/water, 100 °C) gave mononuclear complexes 1a and 1d with the ligands as [N,N] bidentate. In contrast, the reaction of N-phenyl or N-meta-chlorophenyl hydrazones (b and c, respectively) under analogous reaction conditions gave the cycloplatinated species 2b and 2c with the ligand as [C,N,N] terdentate. The treatment of the mononuclear complexes 1a and 1d with NaOAc (n-butanol, 100 °C) gave the corresponding cycloplatinated complexes 2a and 2d. Acetophenone hydrazone platinacycle 2e was prepared in a similar fashion and its reaction with tertiary mono- and triphosphines gave mono- or trinuclear species depending on the reaction conditions. The X-ray crystal structures of some of these complexes showed interesting π-π slipped stacking interactions between metallacyclic rings which, according to NCI analyses, showed an aromatic character. With an aim to rationalize the different reactivities shown by acetylpyridine hydrazones and the precise role of the acetate anion, the energy profiles for the three main steps of cycloplatination (iminoplatinum complex formation, chelation and cyclometallation) have been determined by using the DFT (M06) methods. Calculations indicate that the cycloplatination of 1b proceeds via electrophilic substitution, involving the direct replacement of the chloride anion at the Pt(ii) centre with the N-phenyl moiety as the rate-determining step, to give an agostic intermediate 5b+ that, subsequently, leads to the elimination of a proton as hydrogen chloride. When present as an "external" base, acetate enters the coordination sphere around the Pt(ii) centre and facilitates hydrazone N-H deprotonation and electrophilic C-H activation through a dissociative route, leading to a Wheland-type σ-complex intermediate 9ac.
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Affiliation(s)
- Ismael Marcos
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Vicente Ojea
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Digna Vázquez-García
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Jesús J Fernández
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Alberto Fernández
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Margarita López-Torres
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - Jorge Lado
- Departamento de Química & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, E-15008 La Coruña, Spain.
| | - José M Vila
- Departamento de Química Inorgánica, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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