Nomenclature of structural and compositional characteristics of ordered microporous and mesoporous materials with inorganic hosts(IUPAC Recommendations 2001)

Abstract

Republication or reproduction of this report or its storage and/or dissemination by electronic means isAbstract: A system of terms applicable to ordered microporous and mesoporous materials is proposed, and rules for writing a standardized crystal chemical formula for such materials are presented. The recommendations are based both on common usage and on a systematic classification scheme. The nomenclature has been developed to encompass all inorganic materials with ordered, accessible pores with free diameters of less than 50 nm. The crystal chemical formula describes the chemical composition of both the guest species and the host, the structure of the host, the structure of the pore system, and the symmetry of the material. This formula can be simplified or expanded to suit the user's requirements.

Open‐Framework Materials Synthesized in the TMA+/TEA+ Mixed‐Template System: The New Low Si/Al Ratio Zeolites UZM‐4 and UZM‐5

“…The grc polyhedron, found in several other zeolites such as LTA, has usually been called an alpha cage but according to recent IUPAC recommendations is more properly called an alpha cavity. [18] The wbc polyhedron has not previously been found in any zeolite to our knowledge. Both of these cavities are accessible for adsorption of molecules larger than water through 8-ring windows.…”

Effective delivery of volatile biocides employing mesoporous silicates for treating biofilms

“…MSNPs have pores ranging from 2 to 50 nm in diameter into which compounds of interest can be loaded [14]. Particle size, porosity and surface & 2017 The Author(s) Published by the Royal Society.…”

Chemical Hieroglyphs: Abstract Depiction of Complex Void Space Topology of Nanoporous Materials

“…It must be noted that the building blocks we discuss here do not correspond to IUPAC's definition of composite building blocks (which may include also chains, not only rings) nor do they exactly correspond to the IUPAC definition of pores, which distinguishes cages, cavities, and channels. 18 IUPAC's cage and cavity definitions are polyhedral pores whose windows are respectively, too narrow and wide enough, to be penetrated by a guest species larger than water. Both cages and cavities may be valid building blocks according to our definition, and both will be referred to as cages throughout this article.…”

“…In all three cases, channels are formed by the largest cages [4 18 ] for FAU, RWY, and DDR, respectively. Information about restricting windows is ob-tained by comparing the width of these cages with the width of the connected solid black edges, and the latter ones are narrower.…”