For nearly 200 years, scientists have known that the elements molybdenum and oxygen can form various large molecules, which usually impart a unique blue color to aqueous solutions. Only recently have scientists been able to isolate these molecules, but no one was able to explain their supramolecular structure in solution, until now. In a paper scheduled to appear in an upcoming issue of the Journal of the American Chemical Society (available online August 20), Tianbo Liu, a physicist at the U.S. Department of Energys Brookhaven National Laboratory, describes the unique "blackberry" structure, which may represent a new, stable solute state never seen before.
"The nature of molybdenum blue solutions has remained a fascinating enigma for inorganic chemists since the late 1700s and early 1800s," said Liu. In 1826, scientists discovered the first so-called polyoxomolybdate (POM) molecules with a chemical formula of Mo5O14, and realized that the electronic state of the molybdenum atoms was responsible for the blue color in solution. However, the molybdenum blue solutions contained many more complicated molecules. For a long time, scientists were unable to isolate these molecules.
Recently, however, scientists have isolated several different polyoxomolybdate molecules from various molybdenum blue solutions -- all "giant" compared to other inorganic molecules (see http://www.bnl.gov/bnlweb/pubaf/pr/2002/bnlpr_spotlights_2002.htm). Unlike other water-soluble inorganic compounds, such as common table salt (NaCl), giant POMs do not exist as single ions in water. Instead, they cluster together. But scientists were still unable to understand the structures of these aggregates, even with the help of electronic microscopes.
Karen McNulty Walsh | EurekAlert!
Reptile vocalization is surprisingly flexible
30.05.2017 | Max-Planck-Institut für Ornithologie
New photocatalyst speeds up the conversion of carbon dioxide into chemical resources
29.05.2017 | DGIST (Daegu Gyeongbuk Institute of Science and Technology)
The world's highest gain high power laser amplifier - by many orders of magnitude - has been developed in research led at the University of Strathclyde.
The researchers demonstrated the feasibility of using plasma to amplify short laser pulses of picojoule-level energy up to 100 millijoules, which is a 'gain'...
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
30.05.2017 | Life Sciences
30.05.2017 | Power and Electrical Engineering
29.05.2017 | Earth Sciences