Featured Research

from universities, journals, and other organizations

Pigment discovery expanding into new colors

Date:
July 28, 2011
Source:
Oregon State University
Summary:
Chemists have discovered that the same crystal structure they identified two years ago to create what may be the world's best blue pigment can also be used with different elements to create other colors, with significant potential in the paint and pigment industries.

The unusual "trigonal bipyramidal" crystalline structure seen here is being used by researchers at Oregon State University to create a range of new pigments with properties of safety and stability that should have important applications in the paint and pigment industries.
Credit: Image courtesy of Oregon State University

Chemists at Oregon State University have discovered that the same crystal structure they identified two years ago to create what may be the world's best blue pigment can also be used with different elements to create other colors, with significant potential in the paint and pigment industries.

First on the list, appropriately, is a brilliant orange pigment -- appropriate for the OSU Beavers whose team colors are black and orange, and a university in a "Powered by Orange" advancement campaign.

But the broader potential for these pigments, researchers say, is the ability to tweak essentially the same chemical structure in slightly different ways to create a whole range of new colors in pigments that may be safer to produce, more durable and more environmentally benign than many of those that now exist.

Among the possibilities, they say, are colors that should be of interest to OSU's athletic rival 40 miles down the road at the University of Oregon -- yellow and green.

"The basic crystal structure we're using for these pigments was known before, but no one had ever considered using it for any commercial purpose, including pigments," said Mas Subramanian, the Milton Harris Professor of Materials Science in the OSU Department of Chemistry.

"All of these colors should share the same characteristics of being extremely stable, durable, and resistant to heat and acid," he said. "And they are based on the same crystal structure, so minor adjustments to the technology will produce very different colors and very high quality pigments."

OSU has already applied for a patent on this technology, samples are now being tested by private industry, and the latest findings were published recently in Inorganic Chemistry, a journal of the American Chemical Society. The research has been supported by the National Science Foundation.

This invention evolved from what was essentially an accidental discovery in 2009 in an OSU lab, where Subramanian was exploring some manganese oxides for interesting electronic properties. At one stage of the process, when a sample had been heated to almost 2,000 degrees Fahrenheit, the compound turned a vivid blue.

It was found that this chemistry had interesting properties that affects the absorption of light and consequently its color. So Subramanian and his research team, including OSU professor emeritus Art Sleight, quickly shifted their electronics research into what may become a revolution in the paint and pigment industry. Future applications may range from inkjet printers to automobiles or even ordinary house paint.

The work created, at first, a beautiful blue pigment, which had properties that had eluded humans for thousands of years, dating back to the Han dynasty in China, ancient Egyptians and Mayan culture. Most previous blue pigments had various problems with toxicity, durability and vulnerability to heat or acid. Some are carcinogenic, others emit cyanide.

Expanding that research, the scientists further studied this unusual "trigonal-bypyramidal coordination" of crystalline structure, atoms that are combined in a certain five-part coordinated network. The initial blue color in the pigment came from the manganese used in the compound. The scientists have now discovered that the same structure will produce other colors simply by substituting different elements.

"The new orange pigment is based on iron, and we might use copper and titanium for a green pigment," Subramanian said. "Yellow and deep brown should be possible, and we should be able to make a new red pigment. A lot of red pigments are now made with cadmium and mercury, which can be toxic.

"These should all be very attractive for commercial use," he said.


Story Source:

The above story is based on materials provided by Oregon State University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Peng Jiang, Jun Li, Arthur W. Sleight, M. A. Subramanian. New Oxides Showing an Intense Orange Color Based on Fe3 in Trigonal-Bipyramidal Coordination. Inorganic Chemistry, 2011; 50 (13): 5858 DOI: 10.1021/ic200535c

Cite This Page:

Oregon State University. "Pigment discovery expanding into new colors." ScienceDaily. ScienceDaily, 28 July 2011. <www.sciencedaily.com/releases/2011/07/110727151445.htm>.
Oregon State University. (2011, July 28). Pigment discovery expanding into new colors. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2011/07/110727151445.htm
Oregon State University. "Pigment discovery expanding into new colors." ScienceDaily. www.sciencedaily.com/releases/2011/07/110727151445.htm (accessed July 22, 2014).

Share This




More Matter & Energy News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Government Approves East Coast Oil Exploration

Government Approves East Coast Oil Exploration

AP (July 18, 2014) The Obama administration approved the use of sonic cannons to discover deposits under the ocean floor by shooting sound waves 100 times louder than a jet engine through waters shared by endangered whales and turtles. (July 18) Video provided by AP
Powered by NewsLook.com
Sunken German U-Boat Clearly Visible For First Time

Sunken German U-Boat Clearly Visible For First Time

Newsy (July 18, 2014) The wreckage of the German submarine U-166 has become clearly visible for the first time since it was discovered in 2001. Video provided by Newsy
Powered by NewsLook.com
Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Obama: U.S. Must Have "smartest Airports, Best Power Grid"

Reuters - US Online Video (July 17, 2014) President Barak Obama stopped by at a lunch counter in Delaware before making remarks about boosting the nation's infrastructure. Mana Rabiee reports. Video provided by Reuters
Powered by NewsLook.com
Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

Crude Oil Prices Bounce Back After Falling Below $100 a Barrel

TheStreet (July 16, 2014) Oil Futures are bouncing back after tumbling below $100 a barrel for the first time since May yesterday. Jeff Grossman is the president of BRG Brokerage and trades at the NYMEX. Grossman tells TheStreet the Middle East is always a concern for oil traders. Oil prices were pushed down in recent weeks on Libya increasing its production. Supply disruptions in Iraq fading also contributed to prices falling. News from China's economic front showing a growth for the second quarter also calmed fears on its slowdown. Jeff Grossman talks to TheStreet's Susannah Lee on this and more on the Energy Department's Energy Information Administration (EIA) report. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins