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Iijima T, Yamase T, Nishimura K. Molecular and electron-spin structures of a ring-shaped mixed-valence polyoxovanadate (IV, V) studied by (11)B and (23)Na solid-state NMR spectroscopy and DFT calculations. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2016; 76-77:15-23. [PMID: 27018827 DOI: 10.1016/j.ssnmr.2016.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 06/05/2023]
Abstract
(11)B and (23)Na solid-state nuclear magnetic resonance (NMR) spectra of ring-shaped paramagnetic crystals of H15[V7(IV)V5(V)B32O84Na4]·13H2O containing seven d(1) electrons from V(IV) were studied. Magic-angle-spinning (MAS) and multiple-quantum MAS NMR experiments were performed at moderate (9.4T) and ultrahigh magnetic fields (21.6T). The NMR parameters for quadrupole and isotropic chemical shift interactions were estimated by simulation of the NMR spectra and from relativistic density functional theory (DFT) calculations. Four Na ions incorporated into the framework were found to occupy four distinct sites with different populations. The DFT calculation showed that d(1) electrons with effectively one up-spin caused by strong antiferromagnetic interactions were delocalized over the 12V ions.
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Affiliation(s)
- Takahiro Iijima
- Institute of Arts and Sciences, Yamagata University, Yamagata 990-8560, Japan.
| | - Toshihiro Yamase
- Tokyo Institute of Technology, Nagatsuta, Yokohama 226-8503, Japan; MO Device Corporation, Kanazawa 920-0335, Japan
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Kimura N, Shimizu T, Ikeda R. High-Resolution Solid-State NMR Studies of Natural Abundant15N Observed in Halogen-Bridged One-Dimensional Complexes, [NiX(chxn)2]X2and [Pd(chxn)2][PdX2(chxn)2]Y4(chxn = (1R,2R)-Diaminocyclohexane; Y = X (Halogen), NO3, and ClO4). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2009. [DOI: 10.1246/bcsj.82.704] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Bennett MA, Bhargava SK, Bond AM, Bansal V, Forsyth CM, Guo SX, Privér SH. Electrochemical and Chemical Oxidation of [Pt2(μ-pyrophosphite)4]4− Revisited: Characterization of a Nitrosyl Derivative, [Pt2(μ-pyrophosphite)4(NO)]3−. Inorg Chem 2009; 48:2593-604. [DOI: 10.1021/ic802213v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin A. Bennett
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Suresh K. Bhargava
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Vipul Bansal
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Craig M. Forsyth
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Si-Xuan Guo
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Steven H. Privér
- Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia, School of Applied Sciences (Applied Chemistry), RMIT University, GPO Box 2476V, Melbourne, Victoria 3001, Australia., and School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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Takaishi S, Yamashita M. Solitons, polarons and their dynamics in mixed-valence halogen-bridged MX-chains. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2008; 366:93-100. [PMID: 17827123 DOI: 10.1098/rsta.2007.2142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
This article describes the photo-generation processes of elementary excitations such as solitons and polarons, and their dynamics in the one-dimensional (1D) halogen-bridged Pt compound [Pt(en)2Br](ClO4)2. Spin-solitons were photo-generated via relaxation processes of CT excitons and self-trapped excitons, made evident by photo-induced absorption and photo-induced electron spin resonance spectra. Polarons were not generated from CT excitons. Diffusion of spin-solitons on the 1D chain was studied quantitatively by analysing 1H NMR spin-lattice relaxation times (T1).
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Affiliation(s)
- Shinya Takaishi
- Department of Chemistry, Graduate School of Science, Tohoku University and CREST(JST), 6-3 Aramaki-Aza-aoba, Aoba-ku, Sendai 980-8578, Japan.
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