3
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Zhang Z, Lieu T, Wang X, Daugulis O, Miljanic O. Synthesis and Optical Properties of Fluorinated Tetraphenylethylenes. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zhenglin Zhang
- University of Houston Department of Chemistry UNITED STATES
| | - Thien Lieu
- University of Houston Department of Chemistry UNITED STATES
| | - Xiqu Wang
- University of Houston Department of Chemistry UNITED STATES
| | - Olafs Daugulis
- University of Houston Department of Chemistry UNITED STATES
| | - Ognjen Miljanic
- University of Houston Department of Chemistry 112 Fleming Building 77204-5003 Houston UNITED STATES
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4
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Matos CRMO, Sarmiento CV, C Silva H, Ferreira GB, Guedes GP, Nunes WC, Ronconi CM. Field-induced single-ion magnets exhibiting tri-axial anisotropy in a 1D Co(II) coordination polymer with a rigid ligand 4,4'-(buta-1,3-diyne-1,4-diyl)dibenzoate. Dalton Trans 2021; 50:15003-15014. [PMID: 34726676 DOI: 10.1039/d1dt01961a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein a 1D Co(II) coordination polymer of formula [Co(η1-L1)(η2-L1)(py)2(H2O)]n (CoCP) has been synthesised using the rigid H2L1 proligand, containing a long spacer bearing two triple bonds. Single-crystal X-ray diffraction showed that Co(II) adopts a distorted octahedral geometry. The state-averaged complete active self-consistent field (SA-CASSCF) calculation showed that the ground state of CoCP is a high spin quartet with a highly multiconfigurational character of its electronic structure. Due to the large intra- and intermolecular distances between the spin carriers, the magnetic interactions are negligible and the zero-field splitting (ZFS) effects of cobalt(II) ions are predominant. This behavior was confirmed by direct current (DC) magnetic measurements and theoretical calculations using the broken-symmetry approach. Quantum chemical calculations indicate that CoCP has a negative axial component possessing mixed tri-axial anisotropy. The DC magnetic susceptibility data were fitted with a Griffith-Figgis Hamiltonian and the obtained parameters are in good agreement with those simulated by the ab initio calculation. Alternating current (AC) magnetic measurements showed a field induced slow magnetic relaxation in CoCP, which is attributed to the hyperfine interaction effects.
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Affiliation(s)
- Catiúcia R M O Matos
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Charlie V Sarmiento
- Instituto de Física, Universidade Federal Fluminense (UFF), Niterói, RJ, 24210-346, Brazil
| | - Henrique C Silva
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Glaucio B Ferreira
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Guilherme P Guedes
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
| | - Wallace C Nunes
- Instituto de Física, Universidade Federal Fluminense (UFF), Niterói, RJ, 24210-346, Brazil
| | - Célia M Ronconi
- Departamento de Química Inorgânica, Universidade Federal Fluminense (UFF), Outeiro de São João Batista, s/n, Campus do Valonguinho, Centro, 24020-141, Niterói, RJ, Brazil.
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5
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Kubo T, Suga Y, Hashizume D, Suzuki H, Miyamoto T, Okamoto H, Kishi R, Nakano M. Long Carbon-Carbon Bonding beyond 2 Å in Tris(9-fluorenylidene)methane. J Am Chem Soc 2021; 143:14360-14366. [PMID: 34459597 DOI: 10.1021/jacs.1c07431] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report on our investigation of C-C bonding longer than 2.0 Å, which can be realized by perpendicularly facing two fluorenyl rings in the title compound. A small orbital overlap between the distantly positioned carbon atoms is observed as a small concentration of electrons on the X-ray electron density map. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of the compound originate from the in-phase and out-of-phase interactions of the overlapping orbitals, respectively, with a gap of 2.39 eV. Solid-state 13C NMR spectroscopy shows a sharp peak at 82.9 ppm for the long-bonded carbons, and a CASSCF(6,6) calculation indicates small diradical character. The experimental and theoretical analyses reveal sufficient covalent-bonding interaction in the long-bonded carbon pair.
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Affiliation(s)
- Takashi Kubo
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.,Innovative Catalysis Science Division (ICS), Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Suita, Osaka 565-0871, Japan
| | - Yuki Suga
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Daisuke Hashizume
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Hiroki Suzuki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Tatsuya Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.,National Institute of Advanced Industrial Science and Technology (AIST)-University of Tokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), AIST, Kashiwa, Chiba 277-8561, Japan
| | - Hiroshi Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan.,National Institute of Advanced Industrial Science and Technology (AIST)-University of Tokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), AIST, Kashiwa, Chiba 277-8561, Japan
| | - Ryohei Kishi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.,Center for Quantum Information and Quantum Biology (QIQB), Osaka University, Toyonaka, Osaka 560-8531 Japan.,Research Center for Solar Energy Chemistry (RCSEC), Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Masayoshi Nakano
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.,Innovative Catalysis Science Division (ICS), Institute for Open and Transdisciplinary Research Initiatives (OTRI), Osaka University, Suita, Osaka 565-0871, Japan.,Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.,Center for Quantum Information and Quantum Biology (QIQB), Osaka University, Toyonaka, Osaka 560-8531 Japan.,Research Center for Solar Energy Chemistry (RCSEC), Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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6
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Wombacher T, Foro S, Schneider JJ. Synthesis and Molecular Structures of the Cationic Silver Complexes of the Polycondensed Aromatics Fluorene, Pseudorubrene, and Truxene. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600901] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Tobias Wombacher
- Eduard‐Zintl‐Institut für Anorganische und Physikalische Chemie Technische Universität Darmstadt Alarich‐Weiss‐Strasse 12 64287 Darmstadt Germany
| | - Sabine Foro
- Institut für Materialwissenschaften Technische Universität Darmstadt Alarich‐Weiss‐Strasse 2 64287 Darmstadt Germany
| | - Jörg J. Schneider
- Eduard‐Zintl‐Institut für Anorganische und Physikalische Chemie Technische Universität Darmstadt Alarich‐Weiss‐Strasse 12 64287 Darmstadt Germany
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8
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Zavras A, White JM, O'Hair RAJ. An unusual co-crystal [(μ2-dcpm)Ag2(μ2-O2CH)(η2-NO3)]2·[(μ2-dcpm)2Ag4(μ2-NO3)4] and its connection to the selective decarboxylation of formic acid in the gas phase. Dalton Trans 2016; 45:19408-19415. [DOI: 10.1039/c6dt03700c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Binuclear silver cluster with μ2-formate and μ2-dcpm catalyses the decomposition of HCO2H. This structural motif is present in the crystal.
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Affiliation(s)
- Athanasios Zavras
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology
- The University of Melbourne
- Melbourne
- Australia
| | - Jonathan M. White
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology
- The University of Melbourne
- Melbourne
- Australia
| | - Richard A. J. O'Hair
- School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology
- The University of Melbourne
- Melbourne
- Australia
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9
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Hau SCK, Tam DYS, Mak TCW. Organosilver(I) framework assembly with trifluoroacetate and enediyne-functionalized alicycles. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2014; 70:37-46. [PMID: 24441126 DOI: 10.1107/s2052520614000171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 01/04/2014] [Indexed: 06/03/2023]
Abstract
Eight new silver(I) trifluoroacetate complexes based on a series of designed ligands, each featuring an alicyclic ring with enediyne functionality, have been synthesized and characterized by single-crystal X-ray diffraction. Each ethynide terminal is inserted into an Agn (n = 4-5) basket, leading to the generation of coordination chain or layer structures, but the well shielded ethenyl group does not take part in silver-olefin bonding. Variation in ring size of the alicycles is shown to influence the construction of the organosilver(I) coordination networks, which are consolidated by weak intermolecular interactions in the crystal structures. The effect of adding ancillary N-donor ligands to the reaction system on the coordination and supramolecular network assembly is also investigated.
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Affiliation(s)
- Sam C K Hau
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People's Republic of China
| | - Dennis Y S Tam
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People's Republic of China
| | - Thomas C W Mak
- Department of Chemistry and Center of Novel Functional Molecules, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People's Republic of China
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