Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



TECH SPACE
Compound switches between liquid and solid states when exposed to light or heat
by Staff Writers
Kobe, Japan (SPX) May 31, 2016


The ionic liquid is clear and colorless, but when exposed to ultraviolet light, the bonds between ruthenium and benzene rings are dissociated and replaced by a structure in which cyano groups link with the ruthenium ions, transforming it into a yellow solid. This solid reverts to the original liquid when exposed to heat. Image courtesy Kobe University. For a larger version of this image please go here.

A research group led by Professor Mochida Tomoyuki (Kobe University Graduate School of Science) and Dr. Funasako Yusuke (Tokyo University of Science, Yamaguchi) has developed a metal-containing compound which transforms into a solid when exposed to light and returns to liquid form when heated. This substance could potentially be used for photolithography technology, such as fabricating printed circuits, among other applications. The findings were published in the journal Chemical Communications on May 7, 2016 (Japan Standard Time).

Coordination polymers are solids with various useful applications. In recent years, research into coordination polymers has increased, and scientists have developed many ways to synthesize them, but most of these methods rely on chemical reactions in solutions. This is the first example of a method that creates coordination polymers by exposing liquids to light.

Techniques that can control the properties of materials through external stimuli such as light and heat are extremely important in creating materials for use in electronics. For example, materials which solidify when exposed to light (photosensitive resins) are used in creating printed circuits, but it is difficult to reuse these materials.

Professor Mochida's research group proposed that if they could control the binding process between metal ions and organic molecules using heat and light, they could create a material that drastically changes its properties when exposed to external stimuli. The group became the first in the world to develop an ionic liquid from a ruthenium complex with cyano groups.

This liquid is colorless, clear, non-volatile, and does not freeze even at -50?. If you apply ultraviolet light to the liquid for a few hours, it changes into an amorphous coordination polymer, and if you heat this solid for one minute at 130?, it returns to its original ionic liquid form.

In this way, by applying light and heat, the group realized a reversible transformation between an ionic liquid and a solid coordination polymer - two substances with completely different structures and different chemical properties.

This research has led to the successful creation of a reusable photocurable liquid. It can potentially be applied to printed circuit boards, 3D printing, and adhesives. Professor Mochida comments, "We plan to continue research on the molecular design of this substance, to reduce its response time, and look into creating more functions for this coordination polymer."

Ionic liquids
Ionic liquids are salts with melting point below 100?. Their melting point is very low compared to standard salts such as sodium chloride. In many cases, the cations of ionic liquids are formed from organic compounds. Their properties include non-volatility, non-flammability, and ionic conductivity. They can potentially function as electrolytes or environmentally-friendly reaction solvents.

Coordination polymers
These are substances in which metal ions and organic ligands combine in repeated coordinate bonds. They have various electronic properties and the ability for adsorption and desorption due to their network structures. In recent years, they have been a popular research topic as functional solids with many potential uses.

Research Report: Reversible transformation between ionic liquids and coordination polymers by application of light and heat


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Kobe University
Space Technology News - Applications and Research






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
TECH SPACE
NIST, partners create standard to improve sustainable manufacturing
Washington DC (SPX) May 30, 2016
Anyone who's ever covered a wall with sticky notes to clearly map all of the steps in a process knows how valuable that exercise can be. It can streamline workflow, increase efficiency and improve the overall quality of the end result. Now, a public-private team led by the National Institute of Standards and Technology (NIST) has created a new international standard that can "map" the critically ... read more


TECH SPACE
A new, water-logged history of the Moon

Russian Firm Develops Project of Reusable Spacecraft for Lunar Missions

SwRI scientists discover fresh lunar craters

NASA research gives new insights into how the Moon got inked

TECH SPACE
Red and Golden Planets at Opposition

Mars makes closest approach to Earth in 11 years

SwRI scientists discover evidence of ice age at Martian north pole

Opportunity investigating soil exposed by rover wheel

TECH SPACE
International Partners Provide Science Satellites for first SLS mission

India Presses Ahead With Space Ambitions

Fun LoL to Teach Machines How to Learn More Efficiently

'Metabolomics: You Are What You Eat' video

TECH SPACE
Chine's satellite industry eyes global satellite market

Bolivia takes over operations of Chinese-built satellite

NASA Chief: Congress Should Revise US-China Space Cooperation Law

China launches new satellite for civilian hi-res mapping

TECH SPACE
BEAM Leak Checks Before Crew Enters Next Week

HERA Mission 10 Crew to "Splashdown" on Wednesday

One Carbon Metabolism on the Space Station

Zuckerberg streams live chat with men in space

TECH SPACE
United Launch Alliance gets $138 million Atlas V contract

EchoStar XVIII and BRIsat are installed on Arianespace's Ariane 5

SpaceX makes fourth successful rocket landing

Arianespace to supply payload dispenser systems for OneWeb constellation

TECH SPACE
Astronomers find giant planet around very young star

Planet 1,200 Light-Years Away Is Good Prospect for a Habitable World

Kepler-223 System Offers Clues to Planetary Migration

Star Has Four Mini-Neptunes Orbiting in Lock Step

TECH SPACE
Compound switches between liquid and solid states when exposed to light or heat

Multifunction Phase Array Radar (MPAR)

Schafer Corp launches new venture in Commercial Space Situational Awareness

Believe the hype? How virtual reality could change your life




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement