Anion and Cation Dynamics in Polyhydroborate Salts: NMR Studies
Abstract
:1. Introduction
2. NMR Approach to Dynamical Studies
3. Ultrafast Low-Temperature Reorientational Motion of BH4 Anions
4. Anion Reorientations and Cation Diffusion in B12H12- and B10H10-Based closo-Borates and Related Compounds
5. Effects of Nanoconfinement on Dynamical Properties of Hydroborates
6. Conclusions and Outlook
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Compound | Activation Energy (meV) | T Range (K) | Method | Reference |
---|---|---|---|---|
Li2B12H12 (LT phase) | 1400 (50) | 490–590 | NMR | [69] |
Na2B12H12 (LT phase) | 770 (20) | 400–520 | NMR | [17] |
Na2B12H12 (HT phase) | 270 (40) | 523–570 | NMR | [17] |
259 (22) | 480–620 | QENS | [72] | |
K2B12H12 | 1070 (54) | 270–370 | NMR a | [65] |
800 (8) | 366–564 | NMR | [17] | |
Rb2B12H12 | 910 (46) | 220–340 | NMR a | [65] |
549 (5) | 315–560 | NMR | [17] | |
(NH4)2B12H12 | 930 (40) | 250–350 | NMR a | [65] |
486 (8) | 297–474 | NMR | [67] | |
Cs2B12H12 | 600 (30) | 180–300 | NMR a | [65] |
333 (15) | 430–530 | QENS | [66] | |
427 (4) | 260–570 | NMR | [17] | |
Na2B10H10 (HT phase) | 180 (30) | 375–435 | NMR | [74] |
124 (2) | 365–500 | QENS | [74] | |
Rb2B10H10 | 522 (7) b | 219–573 | NMR | [75] |
288 (3) and 197 (2) c | 400–680 | QENS | [75] | |
LiCB11H12 (LT phase) | 409 (11) | 278–384 | NMR | [71] |
LiCB11H12 (HT phase) | 177 (7) | 390–435 | NMR | [71] |
NaCB11H12 (LT phase) | 409 (7) | 278–376 | NMR | [71] |
NaCB11H12 (HT phase) | 177 (8) | 380–435 | NMR | [71] |
KCB11H12 (LT phase) | 330 (20) | 258–332 | NMR | [76] |
KCB11H12 (HT phase) | 191 (4) | 341–435 | NMR | [76] |
149 (2) | 345–470 | QENS | [76] | |
LiCB9H10 (LT phase) | 302 (7) b | 258–332 | NMR | [74] |
LiCB9H10 (HT phase) | 299 (5) | 359–418 | NMR | [74] |
170 (2) | 330–410 | QENS | [74] | |
NaCB9H10 (LT phase) | 234 (6) b | 179–278 | NMR | [74] |
NaCB9H10 (HT phase) | 205 (5) | 287–376 | NMR | [74] |
130 (2) | 290–445 | QENS | [74] | |
Na-7-CB10H13 (LT phase) | 330 (20) | 209–315 | NMR | [77] |
Na-7-CB10H13 (HT phase) | 219 (5) | 332–384 | NMR | [77] |
Na2(B12H12)0.5(B10H10)0.5 | 240 (10) | 300–390 | QENS | [78] |
Na2(CB9H10)(CB11H12) | 430 (40) and 147 (9) c | 278–376 | NMR | [79] |
Compound | Activation Energy (meV) | T Range (K) | Method | Reference |
---|---|---|---|---|
Na2B12H12 (LT phase) | 450 (10) | 458–517 | NMR | [17] |
Na2B12H12 (HT phase) | 410 (25) | 523–580 | NMR | [17] |
Na2B10H10 (LT phase) | 750 (20) | 298–367 | NMR | [5] |
Na2B10H10 (HT phase) | 190 (10) | 375–435 | NMR | [5] |
LiCB11H12 (LT phase) | 422 (6) | 332–376 | NMR | [71] |
LiCB11H12 (HT phase) | 92 (7) | 392–426 | NMR | [71] |
NaCB11H12 (LT phase) | 327 (11) | 340–367 | NMR | [71] |
NaCB11H12 (HT phase) | 152 (8) | 376–418 | NMR | [43] |
LiCB9H10 (HT phase) | 55 (9) | 358–418 | NMR | [7] |
NaCB9H10 (HT phase) | 153 (7) | 293–401 | NMR | [7] |
Na-7-CB10H13 (LT phase) | 320 (9) | 198–315 | NMR | [77] |
Na-7-CB10H13 (HT phase) | 116 (7) | 333–385 | NMR | [77] |
134 (3) | 320–403 | PFG-NMR | [77] | |
Li(CB9H10)0.7(CB11H12)0.3 | ~295 | 298–333 | PFG-NMR | [9] |
Na2(B12H12)0.5(B10H10)0.5 | 240 (10) | 180–320 | NMR | [78] |
Na2(CB9H10)(CB11H12) | 353 (11) | 138–349 | NMR | [79] |
135 (8) | 350–435 | NMR | [79] | |
118 (1) | 298–403 | PFG-NMR | [77] |
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Skripov, A.V.; Soloninin, A.V.; Babanova, O.A.; Skoryunov, R.V. Anion and Cation Dynamics in Polyhydroborate Salts: NMR Studies. Molecules 2020, 25, 2940. https://doi.org/10.3390/molecules25122940
Skripov AV, Soloninin AV, Babanova OA, Skoryunov RV. Anion and Cation Dynamics in Polyhydroborate Salts: NMR Studies. Molecules. 2020; 25(12):2940. https://doi.org/10.3390/molecules25122940
Chicago/Turabian StyleSkripov, Alexander V., Alexei V. Soloninin, Olga A. Babanova, and Roman V. Skoryunov. 2020. "Anion and Cation Dynamics in Polyhydroborate Salts: NMR Studies" Molecules 25, no. 12: 2940. https://doi.org/10.3390/molecules25122940