An Introduction to Zeolite Synthesis Using Imidazolium-Based Cations as Organic Structure-Directing Agents
Abstract
:1. Introduction
2. Zeolites
2.1. Nomenclature and Classification
2.2. Construction
3. Zeotypes
- SM I: substitution of the aluminum bound to phosphorous tetrahedra by monovalent (SM Ia), divalent (SM Ib) or trivalent (SM Ic) elements, resulting in M-O-P bonds.
- SM II: substitution of the phosphorous bound to aluminum tetrahedra by tetravalent (SM IIa) or pentavalent (SM IIb) elements, resulting in M-O-Al bonds.
- SM III: substitution of adjacent aluminum and phosphorous tetrahedra for two silicon tetrahedra.
4. Some Concepts on the Synthesis of Zeolites and Zeotypes
5. Imidazolium Ions in Synthesis of Zeolites and Zeotypes
6. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Pore Size | Number of Tetrahedra (MR 1) | Pore Diameter (Å) | Example |
---|---|---|---|
Small | 8 | 4 | PST-1 (NAT) |
Medium | 10 | 5.5 | ZSM-5 (MFI) |
Large | 12 | 7.5 | ZSM-12 (MTW) |
Extra-large | >12 | >7.5 | CIT-5 (CFI) |
Observed Bonds | Impossible Bonds |
---|---|
Al-O-P | P-O-P |
Si-O-Si | P-O-Si |
Si-O-Al | Al-O-Al |
M-O-P | M-O-Al |
M-O-P-O-M | M-O-M |
Cation | Type | |
---|---|---|
Neutral compound | ||
Imidazole | [ImidH]AlP2O8H2·2H2O, [ImidH]Al3P4O16H [63] | |
Bi-substituted imidazolium | ||
1-Benzyl-3-methylimidazolium | AFI, LTA [64], MFI, MTW [65] | |
3-Methyl-1-[(2-methylphenyl) methyl]-1H-imidazol-3-ium | NUD-2 ¥ [66] | |
3-Methyl-1-[(3-methylphenyl) methyl]-1H-imidazol-3-ium | CIT-13 ¥, MFI [3], NUD-2 ¥ [66] | |
1-[(3,5-Dimethylphenyl)methyl]-3-methyl-1H-imidazol-3-ium | CIT-13 ¥ [3] | |
1,3-Bis(1-adamantyl) imidazolium | AFX, CFI, FAU, MOR, STF [67] | |
1,3-Bis(bicyclo[2.2.1]heptan-2-yl)imidazolium | BEA*, SSZ-70 ¥ [67] | |
1,3-Bis(cycloheptyl) imidazolium | BEA*, MOR, SSZ-70 ¥ [67] | |
1,3-Bis(cyclohexyl)imidazolium | BEA*, EUO, FAU, MOR, SSZ-70 ¥ [67] | |
1,3-Bis(cyclohexylmethyl) imidazolium | BEA*, FAU, MOR, MTW, SSZ-70 ¥ [67] | |
1,3-Bis(cyclopentyl) imidazolium | BEA*, SSZ-70 ¥ [67] | |
1,3-Bis(cyclooctyl)imidazolium | BEA*, FAU, MOR [67] | |
1,3-Bis(pentan-3-yl)imidazolium | FAU, MTW, MOR, SSZ-70 ¥ [67] | |
1,3-Bis(tert-butyl)imidazolium | FAU, MOR [67] | |
1,3-Bis(2,4,4-trimethylpentan-2-yl)imidazolium | FAU [67] | |
1-Butyl-3-methylimidazolium | AEL [68], AFI [64], ANA, BEA*, MFI [8,56,69], FAU [70], LTA [71], TON [8,72], UWY $ [73] | |
1,3-Dimethylimidazolium | ITW $ [74], FER [75], TON [67] | |
1,3-Diethylimidazolium | MFI, TON [67] | |
1,3-Diisopropylimidazolium | MTT, MTW, SSZ-70 ¥ [67] | |
1,3-Diisobutylimidazolium | BEA*, FAU, MOR, MTW, SSZ-70 ¥ [67] | |
1-Ethyl-3-methylimidazolium | AEI, SIV $, SOD [76], AEL, CHA, LTA [64], CLO [71], TON [77], UOS $ [78] | |
1-Hexyl-3-methylimidazolium | LTA [71] | |
1-Isopropyl-3-methyl imidazolium | MRE*, MTT [79] | |
1-Methyl-3-pentylimidazolium | LTA [71] | |
1-Methyl-3-propylimidazolium | LTA [71] | |
1-(Propan-2-yl)-3-(4-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl]butyl)-1H-imidazol-3-ium | MTW, TON [79] | |
1-(Propan-2-yl)-3-(5-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] pentyl)-1H-imidazol-3-ium | EUO, MFI, MRE* [79] | |
1-(Propan-2-yl)-3-(6-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] hexyl)-1H-imidazol-3-ium | EUO, MFI, MRE*, MTW, TON [79] | |
1-(Propan-2-yl)-3-(7-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] heptyl)-1H-imidazol-3-ium | MTT [79] | |
1-(Propan-2-yl)-3-(8-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] octyl)-1H-imidazol-3-ium | MRE*, MTT, MTW [79] | |
1-(Propan-2-yl)-3-(9-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] nonyl)-1H-imidazol-3-ium | MFI, MRE*, MTW [79] | |
1-(Propan-2-yl)-3-(10-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] decyl)-1H-imidazol-3-ium | MFI, MRE*, MTW, NES, TON [79] | |
1-(Propan-2-yl)-3-(11-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] undecyl)-1H-imidazol-3-ium | MTT [79] | |
1-(Propan-2-yl)-3-(12-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] dodecyl)-1H-imidazol-3-ium | MRE*, MTT [79] | |
1-(Propan-2-yl)-3-(14-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] tetradecyl)-1H-imidazol-3-ium | FER, MTW [79] | |
1-(Propan-2-yl)-3-(16-[1-(propan-2-yl)-1H-imidazol-3-ium-3-yl] hexadecyl)-1H-imidazol-3-ium | FER [79] | |
1-(Triethoxysilyl propyl)-3-dodecylimidazolium | MFI [80] | |
1-(Triethoxysilyl propyl)-3-methylimidazolium | MFI [80] | |
Tri-substituted imidazolium | ||
1-Benzyl-2,3-dimethyl imidazolium | ITW $, MTW [65] | |
2,3-Dimethyl-1-[(2-methyl phenyl)methyl]-1H-imidazol-3-ium | CIT-13 ¥, IWS $, LTA [81] | |
2,3-Dimethyl-1-[(3-methyl phenyl)methyl]-1H-imidazol-3-ium | CIT-13 ¥ [3] | |
2,3-Dimethyl-1-[(4-methyl phenyl)methyl]-1H-imidazol-3-ium | BEC, LTA [81] | |
1-[(3,5-Dimethylphenyl) methyl]-2,3-dimethyl-1H-imidazol-3-ium | CIT-13 ¥ [3] | |
1-((2-[(1,2-Dimethyl-1H-imidazol-3-ium-3-yl)methyl]phenyl)-methyl)-2,3-dimethyl-1H-imidazol-3-ium | BEA* [81] | |
1-((3-[(1,2-Dimethyl-1H-imidazol-3-ium-3-yl)methyl]phenyl)-methyl)-2,3-dimethyl-1H-imidazol-3-ium | BEA*, IWS $ [81] | |
1-((4-[(1,2-Dimethyl-1H-imidazol-3-ium-3-yl)methyl]phenyl)methyl)-2,3-dimethyl-1H-imidazol-3-ium | BEA*, BEC [81] | |
1-(2,3-Dihydroxipropyl)-2,3-dimethylimidazolium | AFI [82] | |
2-Ethyl-1,3-dimethyl imidazolium | CSV $, ITW $, MTW, RTH, STF, STW$ [75] | |
1-Ethyl-2,3-dimethylimidazolium | AFI [83], ITW $, MTW [32] | |
2-Isopropyl-1,3-dimethylimidazolium | MOR, STF [75] | |
1,1′,1′′-(2,4,6-Trimethyl benzene-1,3,5-triyl)tris (methylene)tris-(3-methyl-1H-imidazol-3-ium) | -ITV $ [4] | |
1,2,3-Trimethylimidazolium | AFI, CHA, HPM-3 ¥ [25], ITW $ [78], RTH [75], MFI, STF [84] | |
1,3,4-Trimethylimidazolium | ITW $, TON [74], MOR, RTH [75] | |
1,3,5-Tris(1,2-dimethyl imidazolium)benzene | IWR $, LTA [85] | |
Tetra-substituted imidazolium | ||
2-Ethyl-1,3,4-trimethyl imidazolium | ITW $, MTF, STW $ [5,55], MOR, MTW, RTH [75] | |
1,2,3,4-Tetramethyl imidazolium | MOR, RTH, STW $ [75] | |
1,2,3-Triethyl-4-methylimidazolium | STF [84] | |
Penta-substituted imidazolium | ||
1,2,4,5-Tetramethyl-3-[3-(tetramethyl-1H-imidazol-3-ium-3-yl)propyl]-1H-imidazol-3-ium | CSV $, IWV $, STW $ [86] | |
1,2,3,4,5-Pentamethyl imidazolium | RTH, STW $ [75] |
© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
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Vinaches, P.; Bernardo-Gusmão, K.; Pergher, S.B.C. An Introduction to Zeolite Synthesis Using Imidazolium-Based Cations as Organic Structure-Directing Agents. Molecules 2017, 22, 1307. https://doi.org/10.3390/molecules22081307
Vinaches P, Bernardo-Gusmão K, Pergher SBC. An Introduction to Zeolite Synthesis Using Imidazolium-Based Cations as Organic Structure-Directing Agents. Molecules. 2017; 22(8):1307. https://doi.org/10.3390/molecules22081307
Chicago/Turabian StyleVinaches, Paloma, Katia Bernardo-Gusmão, and Sibele B. C. Pergher. 2017. "An Introduction to Zeolite Synthesis Using Imidazolium-Based Cations as Organic Structure-Directing Agents" Molecules 22, no. 8: 1307. https://doi.org/10.3390/molecules22081307
APA StyleVinaches, P., Bernardo-Gusmão, K., & Pergher, S. B. C. (2017). An Introduction to Zeolite Synthesis Using Imidazolium-Based Cations as Organic Structure-Directing Agents. Molecules, 22(8), 1307. https://doi.org/10.3390/molecules22081307