Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Edible Gas Storage

Let them eat MOFs: Take a spoonful of sugar (-cyclodextrin to be precise), a pinch of salt (most alkali metal salts will suffice), and a swig of alcohol (Everclear fits the bill), and you have a robust, renewable, nanoporous (Langmuir surface area 1320 m2 g−1) metal–organic framework for breakfast (CD-MOF-1; see picture, C gray, O red, K purple; yellow sphere: pore).
Let them eat MOFs: Take a spoonful of sugar (-cyclodextrin to be precise), a pinch of salt (most alkali metal salts will suffice), and a swig of alcohol (Everclear fits the bill), and you have a robust, renewable, nanoporous (Langmuir surface area 1320 m2 g−1) metal–organic framework for breakfast (CD-MOF-1; see picture, C gray, O red, K purple; yellow sphere: pore).

Abstract:
A spoonful of sugar, a pinch of salt, and a splash of alcohol - those are the ingredients used by scientists to generate a new class of robust nanoporous metal-organic frameworks. However, the sugar is not ordinary table sugar, but ã-cyclodextrin, produced from biorenewable cornstarch.

Edible Gas Storage

Posted on September 1st, 2010

As Fraser Stoddart and a team of scientists from Northwestern University in Evanston (IL, USA), the University of California in Los Angeles (USA), and the University of St. Andrews (UK) report in the journal Angewandte Chemie, this simple recipe could be the basis for a new class of biocompatible porous crystals made of renewable natural products.

Metal-organic frameworks (MOF) are well-ordered, lattice-like crystals. The nodes of the lattices are complexes of transition metals (such as copper, zinc, nickel, or cobalt); organic molecules make up the connections between the nodes. Within their pores, the MOFs can store gases such as hydrogen or carbon dioxide. Furthermore, they can be used for separation of materials, for catalysis, or for the targeted transport of drugs in the body. Most previously prepared MOFs are made of building blocks that stem from petrochemicals. Stoddart and his team set themselves a challenge to synthesize MOFs from natural products. "The problem is that natural building blocks are generally not symmetrical," according to Stoddart, "this lack of symmetry seems to prevent them from crystallizing as highly ordered, porous frameworks."

ã-Cyclodextrin provided the solution to this problem: it comprises eight asymmetrical glucose residues arranged in ring, which is itself symmetrical. In many countries (for example the USA and Japan), cyclodextrins are approved for use as food additives. The second ingredient in the frameworks is an alkali metal salt. Suitable candidates include ordinary table salt (sodium chloride), the common salt substitute potassium chloride, or potassium benzoate, an approved preservative. These ingredients are dissolved in water and then crystallized by vapor diffusion with an alcohol. It is even possible to use commercially available sources such as grain alcohol. "These ingredients are all substances that can be obtained cheaply, in high quality, and of food-grade purity," says Stoddart.

The resulting crystals consist of cubes made from six ã-cyclodextrin molecules that are linked in three dimensions by potassium ions. These cubes are perfectly arranged to form a porous framework with easily accessible pores. "This arrangement is a previously unknown one," says Stoddart. "The pore volume encompasses 54% of the solid body." Particularly atypical of porous materials is the fact that when dissolved in water, the framework simply dissociates back to its components, which can then be crystallized again with alcohol. Says Stoddart: "In this way a degraded framework can easily be recycled or regenerated."


Author: J. Fraser Stoddart, Northwestern University, Evanston (USA), stoddart.northwestern.edu

Title: Metal-Organic Frameworks from Edible Natural Products

Angewandte Chemie International Edition, dx.doi.org/10.1002/anie.201002343

####

For more information, please click here

Contacts:
Editorial office

Copyright © Angewandte Chemie International Edition

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Dolomite to launch Meros TCU-100 temperature controller at Lab-on-a-Chip & Microarray World Congress September 15th, 2014

Fonon at Cutting-Edge of 3D Military Printing: Live-Combat Scenarios Could See a Decisive Advantage with 3D Printing September 15th, 2014

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

Possible Futures

Air Force’s 30-year plan seeks 'strategic agility' August 1st, 2014

IBM Announces $3 Billion Research Initiative to Tackle Chip Grand Challenges for Cloud and Big Data Systems: Scientists and engineers to push limits of silicon technology to 7 nanometers and below and create post-silicon future July 10th, 2014

Virus structure inspires novel understanding of onion-like carbon nanoparticles April 10th, 2014

Local girl does good March 22nd, 2014

Academic/Education

Malvern technology delivers Malvern reliability in multi-disciplinary lab at Queen Mary University London September 9th, 2014

State University of New York Trustees Unanimously Approve SUNY Polytechnic Institute (SUNY Poly) as New Name for Merged SUNY CNSE / SUNYIT September 9th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

RMIT delivers $30m boost to micro and nano-tech August 26th, 2014

Announcements

Dolomite to launch Meros TCU-100 temperature controller at Lab-on-a-Chip & Microarray World Congress September 15th, 2014

Fonon at Cutting-Edge of 3D Military Printing: Live-Combat Scenarios Could See a Decisive Advantage with 3D Printing September 15th, 2014

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

Research partnerships

Elusive Quantum Transformations Found Near Absolute Zero: Brookhaven Lab and Stony Brook University researchers measured the quantum fluctuations behind a novel magnetic material's ultra-cold ferromagnetic phase transition September 15th, 2014

NEI Corporation and PneumatiCoat Technologies Sign Agreement to Jointly Develop and Market New Materials for Lithium-ion Batteries September 12th, 2014

Advanced Light Source Sets Microscopy Record| Berkeley Lab Researchers Achieve Highest Resolution Ever with X-ray Microscopy September 11th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE