Reversible sorption of nitrogen and xenon gas by the guest-free zeolite tris(o-phenylenedioxy)cyclotriphosphazene (TPP)

Couderc, Gaëtan; Hertzsch, Tino; Behrnd, N.-R.; Krämer, Karl; Hulliger, Jürg

doi:10.1016/j.micromeso.2005.08.036

Cited by 55 publications

(36 citation statements)

References 19 publications

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“…Calixarenes, in particular, can exhibit 'porosity without pores' 10,11 : that is, the solid materials can adsorb guests by cooperative diffusion, despite having isolated voids rather than interconnected pore structures. Permanent, interconnected porosity in discrete organic molecules with low molar mass is rarer 11 and is typically confined to certain ordered molecular crystals [12][13][14][15][16][17][18][19][20][21][22][23][24] . Examples include modified calixarenes [12][13][14] , 3,3′,4,4′-tetra(trimethylsily lethynyl)biphenyl 15 , tris-o-phenylenedioxycyclotriphosphazene 16 , 4-hydroxyphenyl-2,3-4-trimethylchroman 17 , cucurbit [6]uril 18 , some dipeptides 19 , diyne macrocycles 20 and imine-linked porous organic cages 21,22 .…”

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confidence: 99%

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Porous organic molecular solids by dynamic covalent scrambling

Jiang¹,

Jones²,

Hasell³

et al. 2011

Nat Commun

182

189

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The main strategy for constructing porous solids from discrete organic molecules is crystal engineering, which involves forming regular crystalline arrays. Here, we present a chemical approach for desymmetrizing organic cages by dynamic covalent scrambling reactions. This leads to molecules with a distribution of shapes which cannot pack effectively and, hence, do not crystallize, creating porosity in the amorphous solid. The porous properties can be fine tuned by varying the ratio of reagents in the scrambling reaction, and this allows the preparation of materials with high gas selectivities. The molecular engineering of porous amorphous solids complements crystal engineering strategies and may have advantages in some applications, for example, in the compatibilization of functionalities that do not readily cocrystallize.

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confidence: 99%

“…Metal organic polyhedra 25 and heme-like coordination crystals 26 also exhibit intrinsic porosity of this type. Other systems have 'extrinsic' porosity [15][16][17]19 and the pore structure arises purely from the molecular packing. In these cases, porosity may not be obvious from inspection of the isolated molecular structure 24 .…”

mentioning

confidence: 99%

Porous organic molecular solids by dynamic covalent scrambling

Jiang¹,

Jones²,

Hasell³

et al. 2011

Nat Commun

182

189

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“…Some of its relevant applications however, may be based on physico-chemical properties. Within TPP zeolite, which shows a strong affinity to include gaseous CH 4 , CO 2 [6b], I 2 and Xe [6a, 7,13], specific host-guest interactions of the donor-acceptor type are expected for channels. Recent report by Hertzsch T. has shown that 1a may be used to remove radioactive I 2 [6b], even from a humid environment or water [14].…”

Section: Introductionmentioning

confidence: 99%

The Design of Tris(o-phenylenedioxy)cyclo-trisphosphazene (TPP) Derivatives and Analogs toward Multifunctional Zeolite Use

Gahungu

Zhang

2009

Lecture Notes in Computer Science

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Abstract. Taking tris(o-phenylenedioxy)cyclotrisphosphazene (TPP) as template, series of derivatives and analogs were designed with the aim to investigate the structural features of organic zeolite (OZ) and their potential applications. On the basis of DFT-PBE0/6-31G** quantum calculation, the results show a tight dependence of the electron donor (E-D) of the entire molecule on that of the side group and bridge. It was found that extending the side fragment with a phenyl ring and substituting CH/N, or tetrathiafulvalene (TTF)-like group, or the side phenyl fragments substitution by TTF and its derivatives, preserve the "paddle wheel" molecular shape, a key factor in the tunnel formation on which is based the organic OZ use of TPP. In comparison with the commonly used organic superconductors, most of the designed molecules with TTF fragments were predicted to show comparable or better E-D strength.

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“…TPP show a type I sorption isotherm, essentially favoured by the coordinative property of phenyl fragments (Xenon [1,6]) building up the channel wall. Given by examples of large size (10-12 Å ) channels, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…An example is again known by TPP (5 Å ) which can up take Xe(g) at 1 bar and 25°C probably due to an overlap of the atomic functions of Xenon to the phenyl group forming the wall of the cavity [6]. Apparently, an evident goal is to increase the thermal stability of organic zeolites.…”

Section: Introductionmentioning

confidence: 99%

Improved thermal stability of an organic zeolite by fluorination

Reichenbächer

Couderc

Neels

et al. 2007

J Incl Phenom Macrocycl Chem

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The thermal stability of an organic zeolite material, namely 2,4,6-tris(4-bromo-3,5-difluorphenoxy)-1,3,5-triazin (Br-3,5-DFPOT), was improved by fluorination of 2,4,6-tris(4-bromophenoxy)-1,3,5-triazin (BrPOT). The open pore structure (van der Waals diameter of 10.5 Å ) of the modified zeolite was observed up to 110°C in comparison to 70°C for BrPOT. Nitrogen sorption at low temperature showed a type I isotherm and derived pore volumes thereof are in agreement with structural data. It was observed here that Br-3,5-DFPOT crystals preserving the open pore structure could only be obtained below a typical size of about 50 lm. The improved thermal stability of the fluorinated system is attributed to an enhancement of the strength of the Br 3 -synthon.

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Reversible sorption of nitrogen and xenon gas by the guest-free zeolite tris(o-phenylenedioxy)cyclotriphosphazene (TPP)

Cited by 55 publications

References 19 publications

Porous organic molecular solids by dynamic covalent scrambling

Porous organic molecular solids by dynamic covalent scrambling

The Design of Tris(o-phenylenedioxy)cyclo-trisphosphazene (TPP) Derivatives and Analogs toward Multifunctional Zeolite Use

Improved thermal stability of an organic zeolite by fluorination

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