1
|
McKearney D, Choua S, Zhou W, Ganga-Sah Y, Ruppert R, Wytko JA, Weiss J, Leznoff DB. Ring-Oxidized Zinc(II) Phthalocyanine Cations: Structure, Spectroscopy, and Decomposition Behavior. Inorg Chem 2018; 57:9644-9655. [PMID: 30009596 DOI: 10.1021/acs.inorgchem.8b01579] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A bromonium oxidizing agent was used to produce a ring-oxidized zinc phthalocyanine (PcZn), [PcZn(solvent)]•2[BArF4]2 (1·solvent), in good yield. This material is dimeric in the solid state with one axially coordinated solvent [tetrahydrofuran (THF) or 1,2-dimethoxyethane (DME)] and close intradimer ring-ring distances of 3.18 and 3.136 Å (THF and DME respectively); this proximity facilitates strong antiferromagnetic coupling to yield diamagnetic dimers. 1·THF is present in solution as a monomer and a dimer. In CH2Cl2, the dimer is favored above 0.1 mM, and it is almost exclusively present in solvents with a high dielectric constant such as acetonitrile. The material 1·THF/DME decomposes in DME to a meso-nitrogen-protonated species, [HPcZn(DME)2][BArF4] (2), which was isolated and represents the first example of such a structurally characterized, protonated, unsubstituted PcM complex. A partially oxidized dimer or "pimer" [(PcZn(DME))2]•[BArF4] (3) was also structurally characterized and has a intradimer ring-ring distance of 3.192 Å, similar to 1·THF/DME. Dimer 3 also represents the first isolated PcM-based pimer. Electron paramagnetic resonance analysis of a 1.0 mM solution of 1·DME in DME showed the production of 3 over hours by the combination of 1·DME and 2 in solution.
Collapse
Affiliation(s)
- Declan McKearney
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada
| | - Sylvie Choua
- Institut de Chimie , UMR 7177 CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France
| | - Wen Zhou
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada
| | - Yumeela Ganga-Sah
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada
| | - Romain Ruppert
- Institut de Chimie , UMR 7177 CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France
| | - Jennifer A Wytko
- Institut de Chimie , UMR 7177 CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France
| | - Jean Weiss
- Institut de Chimie , UMR 7177 CNRS-Université de Strasbourg , 4 rue Blaise Pascal , 67000 Strasbourg , France
| | - Daniel B Leznoff
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada
| |
Collapse
|
2
|
Konarev DV, Faraonov MA, Kuzmin AV, Khasanov SS, Nakano Y, Norko SI, Batov MS, Otsuka A, Yamochi H, Saito G, Lyubovskaya RN. Crystalline salts of metal phthalocyanine radical anions [M(Pc˙3−)]˙− (M = CuII, PbII, VIVO, SnIVCl2) with cryptand(Na+) cations: structure, optical and magnetic properties. NEW J CHEM 2017. [DOI: 10.1039/c7nj00530j] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical anion salts of metal phthalocyanines (M = CuII, PbII, VIVO and SnIVCl2) with the {cryptand(Na+)} cations have been obtained and studied.
Collapse
Affiliation(s)
| | | | | | | | - Yoshiaki Nakano
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Semen I. Norko
- Institute of Problems of Chemical Physics RAS
- Chernogolovka
- Russia
- Moscow State University
- 119991 Moscow
| | - Mikhail S. Batov
- Institute of Problems of Chemical Physics RAS
- Chernogolovka
- Russia
- Moscow State University
- 119991 Moscow
| | - Akihiro Otsuka
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Hideki Yamochi
- Division of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Gunzi Saito
- Toyota Physical and Chemical Research Institute
- Nagakute
- Japan
| | | |
Collapse
|
3
|
Konarev DV, Kuzmin AV, Khasanov SS, Otsuka A, Yamochi H, Saito G, Lyubovskaya RN. Bis(N-methylimidazole)-Substituted Neutral Phthalocyanines {MIII(MeIm)2(Pc)·3-}0(M = Al, Ga) Containing Radical Trianionic Phthalocyanine Macrocycles. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600680] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Dmitri V. Konarev
- Institute of Problems of Chemical Physics RAS; 142432 Chernogolovka Moscow Region Russia
| | - Alexey V. Kuzmin
- Institute of Solid State Physics RAS; Chernogolovka Moscow Region 142432, Russia
| | - Salavat S. Khasanov
- Institute of Solid State Physics RAS; Chernogolovka Moscow Region 142432, Russia
| | - Akihiro Otsuka
- Division of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku 606-8502 Kyoto Japan
| | - Hideki Yamochi
- Division of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku 606-8502 Kyoto Japan
| | - Gunzi Saito
- Faculty of Agriculture; Meijo University; 1-501 Shiogamaguchi, Tempaku-ku 468-8502 Nagoya Japan
- Toyota Physical and Chemical Research Institute; 41-1, Yokomichi 480-1192 Nagakute Aichi Japan
| | - Rimma N. Lyubovskaya
- Institute of Problems of Chemical Physics RAS; 142432 Chernogolovka Moscow Region Russia
| |
Collapse
|
4
|
Konarev DV, Troyanov SI, Faraonov MA, Ishikawa M, Otsuka A, Yamochi H, Saito G, Lyubovskaya RN. Molecular structure, optical and magnetic properties of the {SnIVPc(3-)Cl2}•- radical anions containing negatively charged Pc ligands. J PORPHYR PHTHALOCYA 2015. [DOI: 10.1142/s1088424614501077] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Radical anion salt ( PPN +){ Sn IV Pc (3-) Cl 2}•- (1) was obtained by the reduction of tin(IV) phthalocyanine dichloride { Sn IV Pc (2-) Cl 2} with ( PPN +)( C 60•-) ( PPN + is bis(triphenylphosphoranylidene)-ammonium cation). It was shown that the reduction is centered mainly on the Pc ligand providing the appearance of a new band in the spectrum of 1 in the NIR range at 1006 nm and blue-shift of Soret and Q-bands of Sn IV Pc (2-) Cl 2. The alternation of short and long C – N imine bonds for two oppositely located isoindole units in 1 indicates possible disruption of aromaticity of the Pc ligand under reduction. Salt 1 has effective magnetic moment of 1.69 μB at 300 K corresponding to the contribution of one non-interacting S = 1/2 spin per formula unit and manifests antiferromagnetic coupling of spins with Weiss temperature of -7.3 K in the 400–30 K range. The salt shows a broad EPR signal with g = 1.9957 and linewidth of 19.3 mT at room temperature. The signal splits into two components below 120 K. Strong broadening of the EPR signal and shift of g-factors to smaller values in comparison with the EPR signal from radical anions of metal-free phthalocyanine { H 2 Pc (3-)}•- were attributed to the contribution of the { Sn III Pc (2-) Cl 2}- admixture with paramagnetic Sn III . There are π–π stacking one-dimensional chains composed of { Sn IV Pc (3-) Cl 2}•- in 1 along the a axis with weak overlapping between phenylene groups of phthalocyanine radical anions. The calculated HOMO–HOMO overlap integral is 0.0033 and the SOMO–SOMO overlap integral is only 0.0004. Metallic conductivity is not realized in 1 most probably due to weak SOMO–SOMO overlapping.
Collapse
Affiliation(s)
- Dmitri V. Konarev
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Sergey I. Troyanov
- Chemistry Department, Moscow State University, Leninskie Gory, 119991 Moscow, Russia
| | - Maxim A. Faraonov
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| | - Manabu Ishikawa
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
- Faculty of Agriculture, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan
| | - Akihiro Otsuka
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hideki Yamochi
- Research Center for Low Temperature and Materials Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Gunzi Saito
- Faculty of Agriculture, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan
| | - Rimma N. Lyubovskaya
- Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow region, 142432, Russia
| |
Collapse
|
5
|
Konarev DV, Kuzmin AV, Faraonov MA, Ishikawa M, Khasanov SS, Nakano Y, Otsuka A, Yamochi H, Saito G, Lyubovskaya RN. Synthesis, Structures, and Properties of Crystalline Salts with Radical Anions of Metal-Containing and Metal-Free Phthalocyanines. Chemistry 2014; 21:1014-28. [DOI: 10.1002/chem.201404925] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 11/12/2022]
|
6
|
Tverdova NV, Pimenov OA, Girichev GV, Shlykov SA, Giricheva NI, Mayzlish VE, Koifman OI. Accurate molecular structure of nickel phthalocyanine (NiN8C32H16): Gas-phase electron diffraction and quantum-chemical calculations. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
7
|
YAKUSHI KYUYA, SIMONYAN MKHITAL, DING YUQIN. Spectroscopic studies of solid phthalocyanines and their charge transfer salts. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1002/1099-1409(200101)5:1<13::aid-jpp299>3.0.co;2-o] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We present the polarized reflection spectra of several MPcs ( M ≡ Co , Ni , Cu , Zn , Pb ) in the Q-band region and interpret them based on conventional exciton theory. We compare the polarized reflection spectra of the phthalocyanine radical salts NiPc ( AsF 6)0.5, H 2 Pc ( AsF 6)0.67 and LiPc and interpret the new absorption band near the Q-band using the relationship between the degree of oxidation and the intensity of this new band. Based on the pressure dependence of this new band and the diagnostic phonon modes, we prove a pressure-induced charge transfer in NiPc ( AsF 6)0.5. A metal–insulator phase transition is predicted from the analysis of the plasmon absorption and is confirmed by the high-pressure electrical resistivity. We propose the origin of the pressure-induced charge transfer and the mechanism of the metal–insulator transition. We find the optical transition associated with the 3 d z2 band in the reflection spectrum of CoPc ( AsF 6)0.5, which is proved by comparison with the mixed crystals Co x Ni 1 − x Pc ( AsF 6)0.5. A new weak intermolecular optical transition is found through the resonance enhancement of a local phonon in the mixed crystals Co x Ni 1 − x Pc ( AsF 6)0.5.
Collapse
Affiliation(s)
- KYUYA YAKUSHI
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - MKHITAL SIMONYAN
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - YUQIN DING
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| |
Collapse
|
8
|
Naito T, Matsumura N, Inabe T, Matsuda M, Tajima H. Physical properties of electrically conducting and stable molecular neutral radical solid [Co(2,3-Nc)(CN)2]CH3CN (2,3-Nc = 2,3-naphthalocyanine). J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424604000611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Solid state properties of dicyano(2,3-naphthalocyaninato)cobalt(III) neutral radical crystal, [ Co (2,3- Nc )( CN )2] CH 3 CN , were characterized by measurements of the resistivity under high pressure and under uniaxial strain, thermoelectric power, magnetic susceptibility, ESR and polarized reflectance spectra. The title compound exhibited thermally activated-type electrical conductivity along the c-axis. The room temperature (RT) resistivity ρRT along the c-axis and activation energy Ea rapidly decreased with increasing pressure. The temperature-dependent thermoelectric power S was that of a typical one-dimensional (1D) semiconductor. However the high absolute value of S suggested that this electronic system should be strongly correlated. Although the electrical resistivity exhibited monotonous temperature-dependence, the magnetic susceptibility clearly indicated a Peierls-type transition and marked fluctuation from RT. Both Peierls-type transitions and fluctuations are characteristic phenomena to 1D conductors. Furthermore ESR spectra manifested that the Peierls-type transition occurred at 100 K. The inconsistency between the electrical behavior (without a phase-transition) and magnetic behavior (with a phase-transition) indicates separation of the degrees of freedom in spin and charge (spin-charge separation) of this material. Spin-charge separation is a theoretically predicted phenomenon peculiar to the 1D conductors with strong correlation. The reflectance spectra were quantitatively explained by a 1D Hubbard model, and manifested the existence of a structural fluctuation of this material from RT. Based on these observed physical properties it is concluded that [ Co (2,3- Nc )( CN )2] CH 3 CN is a strongly correlated 1D semiconductor with a Mott(Hubbard) type energy gap and characterised with a fluctuation and spin-charge separation.
Collapse
Affiliation(s)
- Toshio Naito
- Division of Chemistry, Graduate School of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Naoko Matsumura
- Division of Chemistry, Graduate School of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Tamotsu Inabe
- Division of Chemistry, Graduate School of Science, Hokkaido University, Kita 10, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Masaki Matsuda
- The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kahiswa-shi, Chiba 277-8581, Japan
| | - Hiroyuki Tajima
- The Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kahiswa-shi, Chiba 277-8581, Japan
| |
Collapse
|
9
|
Margadonna S, Prassides K, Iwasa Y, Taguchi Y, Craciun MF, Rogge S, Morpurgo AF. Potassium Phthalocyanine, KPc: one-dimensional molecular stacks bridged by K+ ions. Inorg Chem 2007; 45:10472-8. [PMID: 17173402 DOI: 10.1021/ic060727+] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis of potassium phthalocyanine (KPc) and its structural characterization by synchrotron X-ray powder diffraction. We find that while KPc adopts the beta-polymorphic structural type (monoclinic space group P21/a) common for many MPc solids, its structure is characterized by unique features. The K+ ions, which are statistically disordered over two symmetry-equivalent positions, reside in the intrastack spacing of the rodlike molecular assemblies and strongly bond equidistantly to selected N atoms of the two neighboring Pc rings along the chain direction with an unusual 5-fold coordination. The K+-stuffed slipped stacks of Pc units display much greater intrastack and slippage distances than those of other beta-MPc polymorphs. They may be thought as comprising disordered dimeric (Pc)22- units; this leads to electron pairing and is consistent with the observed nonmagnetic response of the system.
Collapse
Affiliation(s)
- Serena Margadonna
- School of Chemistry, University of Edinburgh, Edinburgh EH9 3JJ, U.K.
| | | | | | | | | | | | | |
Collapse
|
10
|
Taguchi Y, Miyake T, Margadonna S, Kato K, Prassides K, Iwasa Y. Synthesis, Structure, and Magnetic Properties of Li-Doped Manganese-Phthalocyanine, Lix[MnPc] (0 ⩽ x ⩽ 4). J Am Chem Soc 2006; 128:3313-23. [PMID: 16522113 DOI: 10.1021/ja0582657] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report on the first synthesis of Li-intercalated manganese-phthalocyanine (MnPc) in the bulk form and on the evolution of the structural and magnetic properties as a function of Li concentration, x. We find that solid beta-MnPc, which comprises rodlike assemblies of individual planar molecules, is best described as a glassy one-dimensional ferromagnet without three-dimensional ordering and that it can be quasi-continuously intercalated with Li up to x = 4, forming an isosymmetrical series of Li(x)[MnPc] phases. Inserted Li+ ions strongly bond to pyrrole-bridging nitrogen atoms of the Pc rings, thereby disrupting the ferromagnetic Mn-N(a)...Mn superexchange pathways. This gradually induces a crossover of the intrachain exchange interactions from ferromagnetic to antiferromagnetic as the doping level, x, increases coupled with a spin-state transition of the Mn2+ ions from intermediate spin, S = 3/2, to high spin, S = 5/2.
Collapse
Affiliation(s)
- Yasujiro Taguchi
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
| | | | | | | | | | | |
Collapse
|
11
|
Devic T, Yuan M, Adams J, Fredrickson DC, Lee S, Venkataraman D. The Maximin Principle of π-Radical Packings. J Am Chem Soc 2005; 127:14616-27. [PMID: 16231914 DOI: 10.1021/ja050346f] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A two-term model is proposed for hydrocarbon and N-containing pi-radicals which are in close contact with one another. The first term is attractive (due to partially occupied frontier pi-orbitals), and the second, repulsive (due to hard-core repulsion between close-lying atoms). This model is applied to dimers where intermolecular contacts are closer than <0.95 x the sum of the atomic van der Waals radii. The maximin principle is proposed. The maximin principle states that the lowest energy conformation maximizes overlap of the frontier orbitals while simultaneously minimizing intermolecular contacts. A Hückel Hamiltonian, the mu(2)-Hamiltonian, which contains the above attractive and repulsive terms, is applied. The interaction surfaces of two pi-hydrocarbon radical cations were calculated for the three systems known crystallographically to contain cations in close contact: naphthalene, fluoranthene, and pyrene. The global minima of these surfaces correspond to the experimentally determined structures. The mu(2)-Hamiltonian energy surfaces of the naphthalene cation dimer are qualitatively similar to those calculated at the RHF/6-311G(d,p) and MP2/6-311G(d,p) levels. The maximin principle is applied to N-containing pi-radicals. Except in the case of tetracyanoethene, the maximin principle correctly predicts the most common dimer crystal packing. (MgPc)(NO(3)).0.5THF and (MgPc)(ReO(4)).1.5THF (Pc = phthalocyanine) were prepared: both new crystal structures follow the maximin principle. The maximin principle is used to suggest the dimer cation ground state of oligoacenes, cations important as organic hole-based semiconductors.
Collapse
Affiliation(s)
- Thomas Devic
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA
| | | | | | | | | | | |
Collapse
|
12
|
Inabe T, Tajima H. Phthalocyanines-versatile components of molecular conductors. Chem Rev 2005; 104:5503-34. [PMID: 15535658 DOI: 10.1021/cr030649x] [Citation(s) in RCA: 236] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tamotsu Inabe
- Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
| | | |
Collapse
|
13
|
Contakes SM, Beatty ST, Dailey KK, Rauchfuss TB, Fenske D. π-Complexes of Phthalocyanines and Metallophthalocyanines. Organometallics 2000. [DOI: 10.1021/om000467i] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephen M. Contakes
- School of Chemical Sciences, University of Illinois, 601 S. Goodwin Avenue, Urbana, Illinois 61801, and the Lehrstuhl für Anorganische Chemie, Technische Universität Karlsruhe, Karlsruhe, Germany
| | - Susan T. Beatty
- School of Chemical Sciences, University of Illinois, 601 S. Goodwin Avenue, Urbana, Illinois 61801, and the Lehrstuhl für Anorganische Chemie, Technische Universität Karlsruhe, Karlsruhe, Germany
| | - Karen K. Dailey
- School of Chemical Sciences, University of Illinois, 601 S. Goodwin Avenue, Urbana, Illinois 61801, and the Lehrstuhl für Anorganische Chemie, Technische Universität Karlsruhe, Karlsruhe, Germany
| | - Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois, 601 S. Goodwin Avenue, Urbana, Illinois 61801, and the Lehrstuhl für Anorganische Chemie, Technische Universität Karlsruhe, Karlsruhe, Germany
| | - Dieter Fenske
- School of Chemical Sciences, University of Illinois, 601 S. Goodwin Avenue, Urbana, Illinois 61801, and the Lehrstuhl für Anorganische Chemie, Technische Universität Karlsruhe, Karlsruhe, Germany
| |
Collapse
|
14
|
Murata K, Liou K, Thompson JA, McGhee EM, Rende DE, Ellis DE, Musselman RL, Hoffman BM, Ibers JA. Structural, Electrical, Magnetic, and Spectroscopic Properties of Ring-Oxidized Molecular Metals Produced by Iodination of Metal-Free and Nickel Tetrabenzporphyrins. Inorg Chem 1997; 36:3363-3369. [PMID: 11670003 DOI: 10.1021/ic961490s] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Detailed studies of the structure, conductivitity, magnetoresistance, optical spectra, and magnetic properties (susceptibility, EPR) for the new molecular metal tetrabenzporphyrin iodide (H(2)(tbp)I) and the electrical, spectral, and magnetic properties of Ni(tbp)I are reported. Paramagnetic transition-ion impurities were carefully excluded during the synthesis of H(2)(tbp)I and Ni(tbp)I, and both materials show much higher, metal-like conductivites than previously seen for less-pure Ni(tbp)I. Comparison of the specular reflectance data for Ni(tbp)I and H(2)(tbp)I allows a distinction between purely ring pi-transitions and metal-involved charge-transfer transitions, and the spectra fix the energy levels of the pi orbitals involved in conduction. Transport, magnetic, and optical properties show that both H(2)(tbp)I and Ni(tbp)I are ring-based conductors that have metal-like conductivities, varying as approximately 1/T, down to ca. 30-40 K. However, the remaining level of defects is higher in the tbp conductors than in H(2)(pc)I, and whereas the latter is metallic down to the mK temperature range, the defects in the (tbp) compounds localize the conduction electrons at approximately 10 K (Ni(tbp)I) and approximately 30 K (H(2)(tbp)I), leading to transport through one-dimensional variable-range hopping. EPR g-values for H(2)(tbp)I and Ni(tbp)I are close to that for the free electron and are nearly temperature-independent. The line widths for both samples are extremely narrow and also are nearly temperature-independent. These results show that Ni(tbp)I does not display doubly-mixed valence, as thought earlier: Paramagnetic impurities significantly altered the EPR signals of the prior samples. H(2)(tbp)I crystallizes in the space group P4/mcc with cell constants of a = 14.173(10) Å and c = 6.463(4) Å. Full-matrix least-squares refinement of 63 variables gave an R index of 0.061 on F(o)(2).
Collapse
Affiliation(s)
- Kazuhiko Murata
- Departments of Chemistry and Physics and Materials Research Center, Northwestern University, Evanston, Illinois 60208-3113, and Department of Chemistry, Franklin & Marshall College, Lancaster, Pennsylvania 17604-3003
| | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Hiejima T, Yakushi K. Pressure‐induced d–π charge transfer in one‐dimensional phthalocyanine conductors, NiPc(AsF6)0.5 and CoPc(AsF6)0.5. J Chem Phys 1995. [DOI: 10.1063/1.469582] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
16
|
Use of aluminium as an electron pool. Reductive coupling of iodobenzenes promoted by electron transfer in an Ni/Pb/A1 multi redox system. Inorganica Chim Acta 1994. [DOI: 10.1016/0020-1693(94)03924-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
17
|
Kasuga K, Nakao T, Mihara T, Sogabe K. Partial Oxidation of [Octakis(dodecyloxy)phthalocyaninato]zinc(II) with 2,3-Dichloro-5,6-dicyano-p-benzoquinone. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1991. [DOI: 10.1246/bcsj.64.3766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
18
|
Kasuga K, Mihara T, Nakao T, Takahashi K. Electrical conductivity of octakis(decyloxy) phthalocyaninato-copper(II). Inorganica Chim Acta 1991. [DOI: 10.1016/s0020-1693(00)80382-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
19
|
Mu P, Nakao T, Handa M, Kasuga K, Sogabe K. Chemical Oxidation of Tetra-t-butylphthalocyanine and Its Complexes with Cobalt(II), Nickel(II), Copper(II), and Zinc(II). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1991. [DOI: 10.1246/bcsj.64.3202] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
|
21
|
Yamakado H, Yakushi K, Kosugi N, Kuroda H, Kawamoto A, Tanaka J, Sugano T, Kinoshita M, Hino S. Preparation, Crystal Structure, and Solid State Properties of Highly Conductive (Phthalocyaninato)platinum Radical Salts: PtPc(ClO4)0.5and PtPc(AsF6)x. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1989. [DOI: 10.1246/bcsj.62.2267] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|