Theoretical study of oligomeric alumatranes present in the chemistry of materials from micro to mesoporous molecular sieves and alumina composites

Fernández, Lorenzo; Viruela-Martín, P.M.; Latorre, Julio; Guillem, Carmen; Beltrán-Porter, Daniel; Amorós, Pedro

doi:10.1016/j.theochem.2007.10.025

Cited by 6 publications

(8 citation statements)

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“…The coordination number and geometry around aluminum correlate well with the 27 Al NMR chemical shi. The 27 Al NMR spectra of 1-3 were collected with the samples dissolved in CDCl 3 , and two broad peaks at approximately 6 ppm and 65 ppm were observed (Fig. S7, S16 and S28 in ESI †).…”

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 70%

“…Structurally characterized compounds 1-3 were also investigated by 1 H, 13 C, and 27 Al NMR spectroscopies, elemental analysis, and electron ionization mass spectrometry (EI-MS) to determine their solution-and gas-phase structures. All chemical shis of the protons and carbons for 1-3 were within their expected ranges.…”

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

“…S7, S16 and S28 in ESI †). 54 Low-eld signals in their 27 Al NMR spectra could be denitely assigned to the aluminosilicate peak of the NMR tube. The both pentacoordinate alumatranes N(C 6 H 4 O) 3 Al-NH 2 CH 2 Ph 19 and Al(OCH 2 CH 2 ) 3 N 21 showed similar signals at 66 ppm in their 27 Al NMR spectra.…”

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

“…54 Low-eld signals in their 27 Al NMR spectra could be denitely assigned to the aluminosilicate peak of the NMR tube. The both pentacoordinate alumatranes N(C 6 H 4 O) 3 Al-NH 2 CH 2 Ph 19 and Al(OCH 2 CH 2 ) 3 N 21 showed similar signals at 66 ppm in their 27 Al NMR spectra. Although the 27 Al NMR signal for the pentacoordinate six-membered system 34 was shied downeld to 37.2 ppm, which is within the expected region from 33 to 61 ppm for monomeric ve-coordinate aluminum alkoxides, 55 the 27 Al NMR signal at approximately 6 ppm for 1-3 is very similar to those for other reported pentacoordinate alumatranes with tricyclic ve-membered rings.…”

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

“…As shown in Chart 1, alumatranes with tricyclic ve- [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] and six-membered 17,18,[34][35][36][37][38] rings are well known. Like other atranes, [39][40][41] all alumatranes with tricyclic veor six-membered ring systems also have a transannular N / Al interaction from the bridgehead N atom in the tetradentate ligand to the Al atom.…”

Section: Introductionmentioning

confidence: 99%

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Dimeric alumatranes as catalysts for trimethylsilylcyanation reaction

et al. 2017

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Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 70%

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

Section: Solution-and Gas-phase Structures Of Alumatranes 1-3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dimeric alumatranes as catalysts for trimethylsilylcyanation reaction

et al. 2017

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A travel though the atrane route, a versatile tool for the materials soft‐synthesis: A twenty‐five years perspective

Garrido,

Benítez,

Ros‐Lis

et al. 2024

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The use of triethanolamine in the preparation of materials has been a fertile area of research during the last decades. It is used in sol‐gel synthesis because of its ability to regulate pH, act as a structure‐directing agent, and form atrane complexes with a wide variety of elements. The atranes harmonize the hydrolysis and condensation processes of inorganic species with their interaction with surfactant molecules or micelles for the obtention of homogeneous materials. This review describes the basic principles of the formation of atrane complexes and their use in material synthesis, followed by a compilation of the main examples found in the bibliography. These materials include pure and doped silicas by using micelles as porogen species (MCM‐41, SBA‐15, UVM‐7, etc.), or without using template agents (TUD‐1, UVM‐11, etc.), non‐silica oxides (Al2O3, TiO2, ZrO2, etc.), mesoporous phosphates and phosphonates, zeotypes (zeolites, aluminophosphates or silicoaluminophosphates, and layered double hydroxides. The atrane route shows a versatile approach for the preparation of these materials with up to three elements simultaneously. The focus of the review centers on the synthesis of the materials and the discussion of their main applications. These examples enrich with a discussion about the future perspective of the topic.

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