Zeolite-like structures

Aza macrocycles have also been used as templating agents in the formation of zinc and other metal cation-containing aluminophosphates via hydrothermal synthesis.705 The zeolite-like structures have been formed in the presence of cyclam- and hexaaza-based macrocycles. 

Clay-like and Zeolite-like Structures Built of Polymeric Cyanocadmate... 

Our isopolycyanocadmate(II) systems are comprised mainly of the heptacyano-tricadmate(II) unit for the zeolite-like structures. The unit is built of a... 

Microcrystalline solids such as zeolites and zeolite like structures have shown the utility of those properties in the domain of acid catalysis. However, little is known on their possibilities as base catalysts. It has been shown [ref. 1,2] that zeolites have basic sites which are able to catalyze reactions needing weak and medium basic strengths. Moreover, a correlation between the basicity and the Sanderson s average electronegativity Df the framework has been observed [ref. 3], Then, their activity as base catalysts can be modified by changing the countercation [ref. 4], the framework Si/Al ratio, or by introducing atoms other than Si and Al in the framework [ref. 5],... 

An additional family of organometallic materials is the cyanometallates, which are Prussian blue analogues. These are microporous materials, similar to zeolites, with relatively large adsorption space and small access windows [237-241], These Prussian blue analogues develop zeolite-like structures based upon a simple cubic (T[M(CN)6]) framework, in which octahedral [M(CN)6]" complexes are linked via octahedrally coordinated, nitrogen-bound Tm+ ions [237], In the prototypic compound, that is, Prussian blue, specifically (Fe4[Fe(CN)6]3 14H20), charge balance with the Fe3+ ions conducts to vacancies at one-quarter of the [Fe(CN)6]4 complexes [242],... 

The search for new zeolite-like structures was initially extended to aluminophosphate-based molecular sieves,3 and these explorations produced a variety of exotic compounds with open-framework structures, which include besides metal phosphates,4 carboxylates,5 sulfates,6 selenites, and selenates.7 Growth of this area has been rapid in the past decade necessitating new editions of the Atlas of Zeolites.2 It is noteworthy that metal—organic framework (MOF) solids have been included as zeolite types in the latest edition of the Atlas of Zeolites. 

The Al MAS NMR spectrum of sample WO, given in Figure 6, shows peaks at 7.8 ppm and 56.6 ppm due to aluminum in octahedral and tetrahedral coordination, respectively [15]. Flowever, the observed chemical shifts indicate aluminum rather incorporated into (hydroxy)aluminates [16] than into zeolite like structures. 

AIPO4-5 Microporous aluminophosphate zeolite-like structure ... 

Kitazawa. T. Nishikiori. S. Kuroda. R. Iwamoto. T. Two novel metal-complex host structures consisting of cyano-cadmate coordination polyhedra. Clay-like and zeolite-like structures. Chem. Lett. 1988. 459-462. 

Kitazawa, T. Nishikiori. S. Iwamoto, T. Three-dimensional framework structures built of heptacyanotricad-mate(II) units providing polyhedral cavities for guests Classification of the zeolite-like structures. J. Chem. Soc., Dalton Trans. 1994. 3695-3710. 

Bissert, G. and Liebau, F. (1984) "Cubic [N(C4H9)4]H7[Si8O20]- 5.33 H2O-A double ring silicate with a zeolite like structure and (H20)i6 water clusters", Acta CiysL A40, C-232. 

This phase has a different, zeolite-like structure as opposed to clathrate structure, and is a competing phase... 

MiceUe-templated silica with uniform distribution of mesopores MiceUe-templated silica with hexagonal arrangement of the mesopores Microporous metal aluminophosphate zeolite-like structures with metal (Me) in the framework (cf. [153])... 

Microporous sUicoaluminophosphate zeolite-like structures (cf. [153]) Microporous sUicoaluminophosphate zeolite-like structure (cf. [153]) Mesoporous material with narrow distribution of mesopore sizes (n = 3, 15)... 

Cationic Zeolites and Other Metal-Containing Zeolite-Like Structures... 

Synthesis of ionic liquid templated zeolite like structures... 

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