منابع مشابه
Microporous and Mesoporous Materials
Tri-block copolymers (poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide), represented as EOxPOyEOx), pluronics (F127 = EO106PO70EO106, P65 = EO20PO30EO20, P85 = EO27PO39EO27, P103 = EO17PO55EO17, and P123 = EO20PO70EO20) and cationic surfactants (cethyltrimethylammonium bromide (CTAB)), two surfactant systems, form complex micelles that self-assemble into mesostructured particles w...
متن کاملMicroporous Porphyrin and Metalloporphyrin Materials
The diverse e4orts to rationally construct microporous solids using porphyrins and metalloporphyrins as molecular building blocks are reviewed. Porphyrin-based molecular crystals, hydrogen-bonded networks, and metal ion coordination polymer networks are examined in detail. Recurring geometrical motifs observed in the structural frameworks of di4erent porphyrinic solids are emphasized, and the i...
متن کاملEntropic selectivity of microporous materials¤
The absorption of hard spheres into narrow pores is examined in the framework of RosenfeldÏs ““ fundamental measure ÏÏ formulation of density functional theory (DFT) for inhomogeneous Ñuids. The inÑuence of the dimensionality of the conÐning geometry is assessed by considering the cases of a spherical cavity, an inÐnite cylindrical channel and an inÐnite slit. The pores are assumed to be in che...
متن کاملNano-/Microporous Materials: Crystalline Metal-Chalcogenide Superlattices
This article describes the recent research progress in the field of crystalline metal-chalcogenide superlatticescontaining tetrahedron-shaped nanoclusters as building units. With the development of new synthetic strategies and structuralconcepts, new clusters that are members of three series of tetrahedral clusters (i.e., supertetrahedral clusters, pentasupertetrahedralclusters, and...
متن کاملPolymeric triple-shape materials.
Shape-memory polymers represent a promising class of materials that can move from one shape to another in response to a stimulus such as heat. Thus far, these systems are dual-shape materials. Here, we report a triple-shape polymer able to change from a first shape (A) to a second shape (B) and from there to a third shape (C). Shapes B and C are recalled by subsequent temperature increases. Whe...
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ژورنال
عنوان ژورنال: Materials Today
سال: 2004
ISSN: 1369-7021
DOI: 10.1016/s1369-7021(04)00188-9