IM-16: A new microporous germanosilicate with a novel framework topology containing d4r and mtw composite building units

Lorgouilloux, Yannick; Dodin, Mathias; Paillaud, Jean‐Louis; Caullet, Philippe; Michelin, Laure; Josien, Ludovic; Ersen, Ovidiu; Bats, Nicolas

doi:10.1016/j.jssc.2008.12.002

Cited by 58 publications

(44 citation statements)

References 29 publications

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“…[40] Scanning electron microscopy (SEM) images were taken on af ield emission XL30E scanning electron microscopy (FEI Company). 19 Fs olid-state NMR spectra were recorded on aB ruker AVANCEIII 500WB spectrometer with a2 .5 mm probe at 376.5 MHz with a spinning rate of 30 kHz. 29 Si solid-state MAS NMR spectra were acquired on a Varian Model VNMRS-400WB spectrometer with a7 .5 mm probe at 79.43 MHz and as pinning rate of 3kHz.…”

Section: Experimental Section Zeolite Synthesismentioning

confidence: 99%

“…[18][19][20] The layered features make the structures of SCM-14 and IM-16 ideal candidatesf or predictingz eolites with new topologies by inverse sigma transformation. SCM-14 is al arge pore zeolite that contains a3 -dimensional 12 8 8-ring framework, built on the same layers as that of GUS-1 or the same columns as that of IM-16.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the 13 Cl iquid MAS NMR spectrum of OSDA molecules, pronatedb ya cid in solution,a nd the initial molar ratio of OSDA/HF in the starting gel indicate that the OSDA molecules in SCM-14 were singly protonated by HF (SCM-14 crystallized in alkaline condition (pH 8.0 % 9.0), Figure S1a-d). [22] The 29 Si solid-state MAS NMR spectra and 19 Fsolid-stateNMR spectra, which are useful to obtain information aboutt he local atomic environments, were also collected on as-made SCM-14. The argon adsorption analysiss hows am ajor pore size of 0.56 nm (t-plot method, Figure S2), which is typical for zeolite structures with 12-ringp ores.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Structure Determination of Large‐Pore Zeolite SCM‐14

Luo

Smeets

Peng

et al. 2017

Chemistry A European J

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SCM-14 (Sinopec Composite Material No. 14), a new stable germanosilicate zeolite with a 12×8×8-ring channel system, was synthesized using commercially available 4-pyrrolidinopyridine as organic structure-directing agents (OSDAs) in fluoride medium. The framework structure of SCM-14 was determined using rotation electron diffraction (RED), and refined against synchrotron X-ray powder diffraction (SXPD) data for both as-made and calcined materials. The framework structure of SCM-14 is closely related to that of three known zeolites: mordenite (MOR), GUS-1 (GON), and IM-16 (UOS). SCM-14 has the same projection as that of mordenite and GUS-1 when viewed along the 12-ring channels, and possesses two more straight 8-ring channels running perpendicular to the 12-ring channels. The structure of SCM-14 can be constructed by either the same layers as that of GUS-1 or the same columns as that of IM-16. Based on their structural relationship, three topologically reasonable hypothetical zeolites were predicted.

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Section: Experimental Section Zeolite Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Structure Determination of Large‐Pore Zeolite SCM‐14

Luo

Smeets

Peng

et al. 2017

Chemistry A European J

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“…Alkylation of substituted imidazoles has also been investigated and has been found to give mainly one-dimensional zeolites such as MTW, TON, and MTT [104]. Later, substituted imidazoles were found to make three new zeolites, ITQ-12 (ITW) in the presence of HF [41], SSZ-70 (structure unknown) in the presence of boron [105], and IM-16 (UOS) in the presence of germanium [65]. The CoAPO, SIZ-7 [106] (SIV), was also prepared with an imidazolium template.…”

Section: Structure-directing Agentsmentioning

confidence: 99%

Synthesis Approaches

Strohmaier

2010

Zeolites and Catalysis

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Zeolites were first identified as natural minerals having unique physical absorption properties. Early researchers tried to reproduce the geological conditions in an attempt to make them synthetically. From the years 1845 to 1937 many researchers investigated the hydrothermal conversion and synthesis of silicates. Although there were a number of claims that zeolites had been made synthetically, they were unsubstantiated as identification was based upon chemical analysis and optical observations. Later attempts at reproducing these early experiments did not give identifiable zeolites. It was not until the 1940s that Professor Richard M. Barrer found the necessary conditions for making zeolites synthetically and he identified them by powder X-ray diffraction. By reacting the powder minerals leucite and analcime with aqueous solutions of barium chloride at temperatures of 180-270 • C for two to six days, a synthetic chabazite was obtained. In 1948, Professor Barrer was able to synthesize zeolites entirely from synthetic solutions of sodium aluminate, silicic acid, and sodium carbonate [1]. A dry powdered gel was first obtained by drying the mixture at 110 • C, and then crystallizing it to a synthetic mordenite by reacting the gel with water at higher temperatures. In the 1950s, Donald Breck and researchers at the Union Carbide Company began to synthesize zeolites from reactive aluminosilicate gels prepared from sodium aluminate and sodium silicate solutions. This led directly to the discovery of the first two new synthetic zeolites, Linde A [2] and Linde X (Si/Al = 1.0-1.5) [3], both having new framework structures, LTA and FAU, respectively. Linde A was found to have excellent ion exchange and gas separation properties. Later, a new, higher silica containing composition of FAU, designated Linde Y [4] (Si/Al = 1.5-3.0), was synthesized and was found to be an excellent cracking catalyst for the conversion of distilled crude oil to gasoline products. The discovery of these two industrially important zeolites caught the attention of many scientists and kick started the field of zeolite synthesis research.

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“…More than 20 new zeolite structures have been solved from PXRD data. These are the ITQ-series (ITQ-32, ITQ-33 (ITT), ITQ-34 (ITR), ITQ-44 (IRR), ITQ-49) [13][14][15][16][17], SSZ-series (SSZ-52 (SFW), SSZ-56 (SFS), SSZ-65 (SSF), SSZ-77 (SVV), and SSZ-82 (SEW)) [18][19][20][21][22], IM-series (IM-16 (UOS) and IM-20 (UWY)) [23,24], LZ-135 (LTF) [25], STA-15 (SAF) [26], MCM-70 (MVY) [27,28], Linde type J (LTJ) [29], COK-14 (OKO) [30], ZnAlPO-57 (AFV) [31], ZnAlPO-59 (AVL) [31], ERS-18/SSZ-45 (EEI) [32], and the oxonitridophosphate-2 (NPT). Recently we demonstrated that zeolites and open-framework structures could be solved from PXRD data using a direct-space structure solution algorithm based on the building units identified by, for example, infrared spectroscopy [33].…”

Section: Introductionmentioning

confidence: 99%

Structure Determination of Zeolites by Electron Crystallography

Willhammar¹,

Zou²

2016

Green Chemistry and Sustainable Technology

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Electron crystallography has shown to be an important method for structural characterization of zeolites. Electron crystallography is a method which comprises several important advantages over other characterization methods. With the electron as a probe, single-crystal diffraction data can be obtained from crystals million times smaller than what is possible with X-ray methods today. This is an important advantage especially for zeolites since they are often obtained as very small crystals. Electrons also enable the formation of images of a specimen with the atomic resolution. This is of essential importance when studying materials that are very complex or contain disorder. Over the years electron crystallography has been used for structure determination of zeolites. Through methodological advances during the last few years, it has evolved into an even more powerful method with crucial importance for structure determination. This chapter gives an introduction to electron crystallography and various electron crystallographic methods and their combinations with other methods used for structure determination of zeolite materials. Different routes for structure determination are described through examples from recently reported structure determinations.

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IM-16: A new microporous germanosilicate with a novel framework topology containing d4r and mtw composite building units

Cited by 58 publications

References 29 publications

Synthesis and Structure Determination of Large‐Pore Zeolite SCM‐14

Synthesis and Structure Determination of Large‐Pore Zeolite SCM‐14

Synthesis Approaches

Structure Determination of Zeolites by Electron Crystallography

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