Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Hydrogen atom trapped in unique cage

Figure 1: The hydrogen atom (H1) nestles perfectly between four yttrium atoms (orange) in the unusual organometallic compound.

Reproduced with permission from Ref. 2 © American Chemical Society
Figure 1: The hydrogen atom (H1) nestles perfectly between four yttrium atoms (orange) in the unusual organometallic compound.

Reproduced with permission from Ref. 2 © American Chemical Society

Abstract:
Unusual compound sees hydrogen bonded to four metal atoms

Hydrogen atom trapped in unique cage

Japan | Posted on July 3rd, 2008

RIKEN scientists, along with an international team of co-workers based in the US, UK and France, have spotted a hydrogen atom simultaneously bonding to four metal atoms, a highly unusual arrangement in this particular class of chemical compounds. The research may help to understand the structure of materials that could store hydrogen more efficiently.

Hydrogen normally prefers to bond with just one other atom. However, it can be persuaded into polygamy by surrounding it with metal atoms that form a cage-like cluster.

Certain compounds of uranium or thorium are already known to host four-coordinate hydrogen atoms. But these compounds' structures and properties are usually difficult to control or modify.

Conversely, the behavior of organometallic compoundsówhich possess organic (carbon-based) molecules as supporting groups around the metal atomsócan be easily controlled by changing the organic groups, allowing the compound's properties to be fine-tuned.

Zhaomin Hou and colleagues from RIKEN's Advanced Science Institute in Wako had previously prepared a series of organometallic compounds containing four metal atoms with eight hydrogen atoms and studied their structures by X-ray diffraction experiments1.

Now, in collaboration with the international team of co-workers, Hou and colleagues have studied a compound based on the metal yttrium using neutron diffraction2, a more precise technique which fires a stream of the neutral particles through a crystal of the compound and uses their subsequent trajectory to calculate the precise arrangement of atoms (Fig. 1). Two crystals, both smaller than the head of a match, were analyzed at facilities in the UK and France.

The team found that hydrogen atoms in different parts of the same compound display a range of three different bonding modesóhooking up with either two, three or four other atoms. The distance between the four-coordinate hydrogen atom and its yttrium neighbors is also surprisingly small: strong evidence that hydrogen fits tightly into the cage made by the four metal atoms.

Hou says that "studies like this will increase our understanding and appreciation of the element hydrogen and its chemistry." But it may also have practical applications. "The increasing interest in hydrogen as a fuel warrants careful studies into the structural chemistry of this most ubiquitous element," he says, adding that there are very few high-precision studies on compounds containing multiply bonded hydrogen.

The team is now studying similar compounds containing two or more different types of metals, which are expected to have unique structures and properties of their own.
Reference

1. Hou, Z., Nishiura, M. & Shima, T. Synthesis and reactions of polynuclear polyhydrido rare earth metal complexes containing "(C5Me4SiMe3)LnH2" units: A new frontier in rare earth metal hydride chemistry. European Journal of Inorganic Chemistry 18, 2535-2545 (2007).
2. Yousufuddin, M., Gutmann, M.J., Baldamus, J., Tardif, O., Hou, Z., Mason, S.A., McIntyre, G.J. & Bau, R. Neutron diffraction studies on a 4-coordinate hydrogen atom in an yttrium cluster. Journal of the American Chemical Society 130, 3888-3891 (2008).

####

For more information, please click here

Copyright © Riken

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

Leti and Taiwanese Tech Organizations Sponsoring Workshop in Taipei on MEMS, IoT, Smart Lighting Applications, System Reliability & Security September 28th, 2016

Dr Barbara Armbruster promoted to Worldwide Sales and Marketing Director for XEI Scientific September 27th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Discoveries

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

UNAM develops successful nano edible coating which increases life food September 27th, 2016

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Announcements

Leti and Taiwanese Tech Organizations Sponsoring Workshop in Taipei on MEMS, IoT, Smart Lighting Applications, System Reliability & Security September 28th, 2016

Oxford Instruments systems now facilitate water purification technology September 27th, 2016

Dr Barbara Armbruster promoted to Worldwide Sales and Marketing Director for XEI Scientific September 27th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Energy

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Researchers at the Catalan Institute of Nanoscience and Nanotechnology show that bending semiconductors generates electricity September 26th, 2016

Semiconducting inorganic double helix: New flexible semiconductor for electronics, solar technology and photo catalysis September 15th, 2016

New perovskite research discoveries may lead to solar cell, LED advances September 12th, 2016

Research partnerships

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Graphene nanoribbons show promise for healing spinal injuries: Rice University scientists develop Texas-PEG to help knit severed, damaged spinal cords September 19th, 2016

NIST Patents Single-Photon Detector for Potential Encryption and Sensing Apps September 16th, 2016

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







Car Brands
Buy website traffic