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Watershed Planning within a Quantitative Scenario Analysis Framework

Watershed Planning within a Quantitative Scenario Analysis Framework

Published on: July 24, 2016

An Open-Framework Germanate with Polycubane-Like Topology.

Hailian Li¹, Mohamed Eddaoudi¹, Omar M Yaghi¹

¹Supramolecular Design and Discovery Group, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604 (USA), Fax: (+1) 602-965-2747.

Angewandte Chemie (International Ed. in English)

|May 2, 2018

Summary

A new open-framework germanate structure, ASU-14, features Ge9 building blocks linked into a rare polycubane topology. This structure contains intersecting channels suitable for hosting piperazine and water molecules.

Keywords:

Cubanes Germanium Microporosity Solid-state structures Zeolite analogues

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Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Area of Science:

Materials Science
Inorganic Chemistry
Crystallography

Background:

Open-framework germanates are an important class of inorganic materials with diverse applications.
The synthesis and structural characterization of novel germanate frameworks are crucial for expanding their potential uses.

Purpose of the Study:

To report a new structure type for an open-framework germanate.
To describe the unique polycubane topology and intersecting channel system of the novel germanate.

Main Methods:

Single-crystal X-ray diffraction was used to determine the crystal structure.
The structure was analyzed to identify the building blocks, linking modes, and pore characteristics.

Main Results:

A new germanate, [Ge9 O18 (OH)4 ]⋅2(H2 ppz)⋅0.5(H2 O) (ASU-14), was synthesized and characterized.
The structure is based on body-centered Ge9 parallelepiped building blocks linked at eight vertices, forming a rare polycubane topology.
An intersecting channel system with ten- and eight-membered rings (pore sizes 5×6 and 4×4 Å2) was observed, hosting piperazine and water molecules.

Conclusions:

ASU-14 represents a new structure type for open-framework germanates.
The polycubane topology and channel system offer potential for applications in host-guest chemistry and catalysis.