New Web database improves access to ionic liquid data

Aug 18, 2006

Chemical engineers and others designing "green" industrial processes using new ionic liquid solvents now have an important new resource, an on-line database of physical properties developed by the National Institute of Standards and Technology.

There has been an explosion of interest in the last few years (including a near-exponential growth in journal articles) in the synthesis and use of ionic liquids--salts that melt below the boiling point of water. A large part of the interest is due to something ionic liquids don't have: a measurable vapor pressure at room temperature. With typical vapor pressures in the range of 10-10 pascal (10-14 psi), ionic liquids have essentially no vapor emissions and so look like excellent candidates for "green solvents" to replace hazardous, air-polluting organic solvents like acetone and benzene. With dozens of anions and cations to choose from, they can be tailored to specific needs and may be particularly useful as solvents for biocatalysis.

One problem has been a lack of organized, reliable data on the basic physical properties of ionic liquids, critical information for designing industrial processes. NIST, in cooperation with the International Union of Pure & Applied Chemistry (IUPAC), has created ILThermo, the IUPAC Ionic Liquids Database. Launched at the end of July, ILThermo is a free, web-based research tool that allows users worldwide to access an up-to-date data collection of thermodynamic, thermochemical and transport properties of pure ionic liquids as well as binary and ternary mixtures.

Assembled from published data, ILThermo aims to include information on structure, thermodynamic and transport properties of pure ionic liquids and mixtures. The inaugural version of the database includes data for more than 200 ions and more than 300 ionic liquids. A particularly valuable feature, according to Michael Frenkel of NIST's Thermodynamic Research Center, is the inclusion of uniformly calculated uncertainties (following guidelines adopted by the major scientific unions and NIST) for each data point in the collection, making it easier to compare the quality of different measurements.

The ILThermo portal on the web is at ilthermo.boulder.nist.gov

Source: NIST

Explore further: Dead feeder cells support stem cell growth

Related Stories

Ears, grips and fists take on mobile phone user ID

5 hours ago

A research project has been under way to explore a biometric authentication system dubbed Bodyprint, with interesting test results. Bodyprint has been designed to detect users' biometric features using the ...

More than 2,200 confirmed dead in Nepal earthquake

5 hours ago

A powerful aftershock shook Nepal on Sunday, making buildings sway and sending panicked Kathmandu residents running into the streets a day after a massive earthquake left more than 2,200 people dead.

Magnitude 6.7 aftershock hits Nepal, causes panic

6 hours ago

A powerful aftershock shook Nepal on Sunday, making buildings sway and sending panicked Kathmandu residents running into the streets a day after a massive earthquake left at least 1,900 people dead.

Nepal quake: Nearly 1,400 dead, Everest shaken (Update)

16 hours ago

Tens of thousands of people were spending the night in the open under a chilly and thunderous sky after a powerful earthquake devastated Nepal on Saturday, killing nearly 1,400, collapsing modern houses and ...

Russian hackers read Obama emails, report says

16 hours ago

Emails to and from President Barack Obama were read by Russian hackers last year in a breach of the White House's unclassified computer system, The New York Times said Saturday.

Recommended for you

Dead feeder cells support stem cell growth

Apr 24, 2015

Stem cells naturally cling to feeder cells as they grow in petri dishes. Scientists have thought for years that this attachment occurs because feeder cells serve as a support system, providing stems cells ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.