Mini-Donut Catches Chloride Ions

User rating: 4.3 / 5 after 3 vote(s)

When traditionally weak C-H hydrogen bonds are preorganized in a shape-persistent macrocycle a strong affinity for chloride ions emerges. This discovery arises from the dual use of click chemistry for efficient macrocyclization and the favorable ster ...
When traditionally weak C-H hydrogen bonds are preorganized in a shape-persistent macrocycle, a strong affinity for chloride ions emerges. This discovery arises from the dual use of click chemistry for efficient macrocyclization and the favorable steric properties of the resulting 1,2,3-triazoles. Credit: (C) Wiley-VCH 2008

Ions—charged atoms or molecules—play an important role in nature, in our bodies as well as for science and technology. It is often necessary to trap, remove, mask, stabilize, or transport ions, whether in the body or the lab. With positively charged metal ions, this goal is often achieved with chelate ligands, organic molecules that tightly grab hold of the ions.


Full story »
All News summaries from General Science news
All News summaries for March 11, 2008

1,700-year old remains unearthed in Peru tomb

3 hours ago | User rating: not rated yet
A Canadian-led team of archaeologists has unearthed the 1,700 year-old tomb of a leader of the pre-Columbian Moche culture in northern Peru, the scientists said.

EU ministers 'discover' biofuels not an obligation

5 hours ago | User rating: not rated yet
European Union energy ministers announced during an informal meeting Saturday that they had been labouring for 18 months under the false impression that an EU plan to fight global warming included an obligation ...

Study: Orangutan populations declining sharply

Jul 05, 2008 | User rating: not rated yet
(AP) -- Orangutan numbers have declined sharply on the only two islands where they still live in the wild and they could become the first great ape species to go extinct if urgent action isn't taken, a new ...

Farmers say salmonella scare has hurt tomato sales

Jul 05, 2008 | User rating: not rated yet
(AP) -- Expect fewer slices of red, ripe tomatoes next to the grill this holiday weekend. With a salmonella scare causing many customers to shun what's normally a summertime favorite, tomato farmers nationwide ...

Bangladesh releases 25,000 protected turtles

Jul 04, 2008 | User rating: not rated yet
Bangladeshi bio-marine experts have released 25,000 endangered baby turtles into the sea in the past two months as part of a state-run captivity breeding programme, an environmental official said Friday.
Goto Archive PhysOrg Forum Goto Archive Video Goto Archive Editorials Goto Archive Free Magazines Goto Archive Newsletter

News Archive