Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > CIQUS researchers control the activation and deactivation of the "sergeants - soldiers effect" in helical polymers by the addition of metal ions

Scheme: Activation of the “dormant sergeant” by an external stimulus
Scheme: Activation of the “dormant sergeant” by an external stimulus

Abstract:
This research, published in the prestigious Chemical Science, describes novel properties of chiral amplification. In these new copolymers with chiral and achiral units, the "sergeants and soldiers effect" is activated or deactivated at will by the presence of metal ions. They can also become encapsulating nanospheres with controlled size and chirality.

CIQUS researchers control the activation and deactivation of the "sergeants - soldiers effect" in helical polymers by the addition of metal ions

Santiago de Compostela | Posted on May 9th, 2014

The prestigious journal Chemical Science has recently published a work by CIQUS researchers (University of Santiago de Compostela, Spain), which it will help to understand the transmission of the structural information between the molecules of helical polymers.

Currently, it is known the "Sergeants and Soldiers effect" in helical copolymers is a chiral amplification phenomenon where a small amount of a chiral monomer in the copolymer is capable to induce a single helical structure.

This work presents a family of copolymers where the chiral amplification based on the "Sergeants and Soldiers effect" can be switched ON/OFF by the presence/absence of metal ions. But in these copolymers, the chiral component does not trigger the chiral amplification by itself — it does not act as a "Sergeant" — until a small amount of a metal ion is added. This allows the selective induction, through chiral amplification, of any of the two helical senses (M or P) on a single copolymer just by selecting the type of ion.

Remarkably, these copolymers also allows the aggregation and encapsulation properties reported for the homopolymers as a result of the cross-linking role played by the metal cations that does not affect the "Sergeants and Soldiers effect" here reported copolymers where the "Sergeants and Soldiers effect" can be switched ON and OFF by the presence of a metal ion. These copolymers have been prepared by a combination of achiral and chiral monomer units, where the chiral ones are unable to drive the chiral amplification unless a small amount of mono- or divalent metal ions is added.

This work, developed by Félix Freire, a member of the Research Group NanoBioMol group, led by Professors Ricardo Riguera and Emilio Quiñoá, belongs to a research line focused on the study of new sensors based on smart polymers that respond to external stimuli. They have already published previous results in prestigious chemistry scientific journals as Angewandte Chemie (2010 and 2011), Journal of the American Chemical Society (2012) and Chemical Science (2013).

####

For more information, please click here

Contacts:
Fernando Casal

Copyright © CIQUS

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Research paper:

Related News Press

News and information

Piezoelectricity in a 2-D semiconductor: Berkeley Lab researchers discovery of piezoelectricty in molybdenum disulfide holds promise for future MEMS December 22nd, 2014

Quantum physics just got less complicated December 22nd, 2014

Enzyme Biosensor Used for Rapid Measurement of Drug December 22nd, 2014

Universality of charge order in cuprate superconductors: Charge order has been established in another class of cuprate superconductors, highlighting the importance of the phenomenon as a general property of these high-Tc materials December 22nd, 2014

Chemistry

How does enzymatic pretreatment affect the nanostructure and reaction space of lignocellulosic biomass? December 18th, 2014

The gold standard December 9th, 2014

Simple, Biocompatible Method Developed for Production of Cerium Oxide Nanoparticles December 9th, 2014

Nanocatalysts Can Reduce Pollution Caused by Diesel Engines December 4th, 2014

Discoveries

Piezoelectricity in a 2-D semiconductor: Berkeley Lab researchers discovery of piezoelectricty in molybdenum disulfide holds promise for future MEMS December 22nd, 2014

Quantum physics just got less complicated December 22nd, 2014

Enzyme Biosensor Used for Rapid Measurement of Drug December 22nd, 2014

Universality of charge order in cuprate superconductors: Charge order has been established in another class of cuprate superconductors, highlighting the importance of the phenomenon as a general property of these high-Tc materials December 22nd, 2014

Materials/Metamaterials

Aculon Hires New Business Development Director December 19th, 2014

ORNL microscopy pencils patterns in polymers at the nanoscale December 17th, 2014

Pb islands in a sea of graphene magnetise the material of the future December 16th, 2014

Graphene Applied in Production of Recyclable Electrodes December 13th, 2014

Announcements

Piezoelectricity in a 2-D semiconductor: Berkeley Lab researchers discovery of piezoelectricty in molybdenum disulfide holds promise for future MEMS December 22nd, 2014

Quantum physics just got less complicated December 22nd, 2014

Enzyme Biosensor Used for Rapid Measurement of Drug December 22nd, 2014

Universality of charge order in cuprate superconductors: Charge order has been established in another class of cuprate superconductors, highlighting the importance of the phenomenon as a general property of these high-Tc materials December 22nd, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Piezoelectricity in a 2-D semiconductor: Berkeley Lab researchers discovery of piezoelectricty in molybdenum disulfide holds promise for future MEMS December 22nd, 2014

Quantum physics just got less complicated December 22nd, 2014

Enzyme Biosensor Used for Rapid Measurement of Drug December 22nd, 2014

Universality of charge order in cuprate superconductors: Charge order has been established in another class of cuprate superconductors, highlighting the importance of the phenomenon as a general property of these high-Tc materials December 22nd, 2014

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE