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Sinha Roy R, Ghosh A, Banerjee S, Ghosh S, Das AK. New kind of electride sandwich complexes based on the cyclooctatetraene ligand M 12(η 8-C 8H 8) 2M 22 (M 1 = Na, K and M 2 = Ca, Mg): a theoretical study. Phys Chem Chem Phys 2023; 25:4710-4723. [PMID: 36661858 DOI: 10.1039/d2cp04127h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In the present study, the electronic structures of a series of binuclear sandwich complexes based on the cyclooctatetraene ligand M12(η8-C8H8)2M22 (M1 = Na, K and M2 = Ca, Mg) are studied theoretically. Each cyclooctatetraene ligand binds with the metal in the η8 binding mode. The M2-M2 bond length agrees well with the reported bimetallic covalent Ca2 and Mg2 bond lengths. The Wiberg bond index (WBI) also indicates the presence of covalent M2-M2 bonds, which gives additional stability to the complex. A non-nuclear attractor (NNA) is found in-between the M2-M2 bond and the negative Laplacian of the electron density is found at the NNA. Noncovalent interaction (NCI) plot shows that electron density is localized at the M2-M2 bond. Based on the performed analysis, we have concluded that the designed sandwich complexes are electrides. We herein report, for the first time, the electride sandwich complexes of the cyclooctatetraene ligand. Due to the presence of a diffuse electron system, the electride complexes exhibit higher values of the static second hyperpolarizability within the range of 2.6 × 105 to 1.4 × 106 a.u. Among the studied complexes, M12(η8-C8H8)2Ca2 exhibit a higher value of static second hyperpolarizability.
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Affiliation(s)
- Ria Sinha Roy
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Avik Ghosh
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Soumadip Banerjee
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Suniti Ghosh
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Abhijit K Das
- School of Mathematical & Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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Wang W, Wang Q, Ding X, Liu X, Sun P, Wang X. Synthesis and Chemical Redox Studies of Half-Sandwich Chromium Carbonyl Azobenzenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenqing Wang
- College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Qianqian Wang
- College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Xuguang Ding
- College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Xiangjun Liu
- College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Peiyang Sun
- College of Chemistry and Materials Science, Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, Anhui Normal University, Wuhu, Anhui 241002, China
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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Huang XC, Xu R, Chen YZ, Zhang YQ, Shao D. Two Four-Coordinate and Seven-Coordinate Co II Complexes Based on the Bidentate Ligand 1, 8-Naphthyridine Showing Slow Magnetic Relaxation Behavior. Chem Asian J 2019; 15:279-286. [PMID: 31793204 DOI: 10.1002/asia.201901395] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/30/2019] [Indexed: 12/11/2022]
Abstract
For a long time, the cobalt(II) complex ([Co(napy)4 ](ClO4 )2 ) (napy=1, 8-naphthyridine) has been considered as an eight-coordinate complex without any structural proof. After careful considerations, two complexes [Co(napy)2 Cl2 ] (1) and [Co(napy)4 ](ClO4 )2 (2) based on the bidentate ligand napy were synthesized and structurally characterized. X-ray single-crystal structural determination showed that the cobalt(II) center in [Co(napy)2 Cl2 ] (1) is four-coordinate with a tetrahedral geometry (Td ), while [Co(napy)4 ](ClO4 )2 (2) is seven-coordinate rather than eight-coordinate with a capped trigonal prism geometry (C2v ). Direct-current (dc) magnetic data revealed that complexes 1 and 2 possess positive zero-field splitting (ZFS) parameters of 11.08 and 25.30 cm-1 , respectively, with easy-plane magnetic anisotropy. Alternating current(ac) susceptibility measurements revealed that both complexes showed slow magnetic relaxation behaviour. Theoretical calculations demonstrated that the presence of easy-plane magnetic anisotropy (D>0) for complexes 1 and 2 is in agreement with the experimental data. Furthermore, these results pave the way to obtain four-coordinate and seven-coordinate cobalt(II) single-ion magnets (SIMs) by using a bidentate ligand.
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Affiliation(s)
- Xing-Cai Huang
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224007, China
| | - Rui Xu
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224007, China
| | - Yong-Zhi Chen
- School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, 224007, China
| | - Yi-Quan Zhang
- Jiangsu Key Lab for NSLSCS, School of Physical Science and Technology, Nanjing Normal University, Nanjing, 210023, China
| | - Dong Shao
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
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Hu M, Luo J, Li S, Liu J, Li J, Tan Z, Niu G, Wang Z, Tang J. Broadband emission of double perovskite Cs 2Na 0.4Ag 0.6In 0.995Bi 0.005Cl 6:Mn 2+ for single-phosphor white-light-emitting diodes. OPTICS LETTERS 2019; 44:4757-4760. [PMID: 31568435 DOI: 10.1364/ol.44.004757] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
In this Letter, we report the broadband photoluminescence of lead-free double perovskite Cs2Na0.4Ag0.6In0.95Bi0.05Cl6:Mn2+. Under ultraviolet excitation, the white phosphor shows two emission peaks at 550 nm and 610 nm from self-trapped exciton and doped Mn2+ ions, respectively, leading to a broad emission spectrum over the whole visible spectrum suitable for lighting application. The white-light-emitting diodes exhibit high light quality with CIE coordinates (0.38, 0.42) and color rendering index of 82.6. The mechanism of luminescence of this double perovskite is also discussed in this Letter.
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Pang H, Zou X, Tao D, Li J, Zhang J, Zhang H. Crystal structure of catena-poly[dichlorido-(μ2-1,5-dimethyl-2-phenyl-4-((pyridin-4-ylmethylene)amino)-1,2-dihydro-3H-pyrazol-3-one-κ2N:O)cobalt(II)] – methanol (1/1), C18H20Cl2CoN4O2. Z KRIST-NEW CRYST ST 2018. [DOI: 10.1515/ncrs-2018-0222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractC18H20Cl2CoN4O2, monoclinic, P21/n (no. 14), a = 9.4744(18) Å, b = 18.084(3) Å, c = 12.290(2) Å, β = 94.196(3)°, V = 2100.1(7) Å3, Z = 4, Rgt(F) = 0.0559, wRref(F2) = 0.1705, T = 296(2) K.
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Affiliation(s)
- Haixia Pang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
| | - Xiaoqing Zou
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
| | - Defu Tao
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
| | - Jun Li
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
| | - Jiahui Zhang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
| | - Hong Zhang
- School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan 430068, P.R. China
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Huang XC, Qi ZY, Ji CL, Guo YM, Yan SC, Zhang YQ, Shao D, Wang XY. High-coordinate CoII and FeII compounds constructed from an asymmetric tetradentate ligand show slow magnetic relaxation behavior. Dalton Trans 2018; 47:8940-8948. [DOI: 10.1039/c8dt01829d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A seven-coordinate CoII compound and an eight-coordinate FeII compound based on an asymmetric tetradentate ligand have been reported, and both of them exhibited slow magnetic relaxation behaviour.
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Affiliation(s)
- Xing-Cai Huang
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Zi-Yi Qi
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Cheng-Long Ji
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Yi-Ming Guo
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Shi-Chang Yan
- School of Chemistry and Environmental Engineering
- Yancheng Teachers University
- Yancheng
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Centre of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Centre of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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