Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > From Molecule to Object

Pushing the limits: A 200×106 Da structurally defined, linear macromolecule (PG5) has a molar mass, cross-section dimension, and cylindrical shape that are comparable to some naturally occurring objects, such as amyloid fibrils or certain plant viruses. The macromolecule is resistant against flattening out on a surface; the picture shows PG5 embracing the tobacco mosaic virus (TMV).
Pushing the limits: A 200×106 Da structurally defined, linear macromolecule (PG5) has a molar mass, cross-section dimension, and cylindrical shape that are comparable to some naturally occurring objects, such as amyloid fibrils or certain plant viruses. The macromolecule is resistant against flattening out on a surface; the picture shows PG5 embracing the tobacco mosaic virus (TMV).

Abstract:
Largest synthetic structure with molecular precision

From Molecule to Object

Weinheim, Germany | Posted on January 4th, 2011

Organic Chemists have always been trying to imitate biology. Although it is possible to make many molecules that imitate biomolecules in terms of structure and function, it remains a challenge to attain the size and form of large biomolecules. An international team led by A. Dieter Schlüter at the ETH Zurich (Switzerland) has now introduced a branched polymer that resembles the tobacco mosaic virus in size and cylindrical form. As the researchers outline in the journal Angewandte Chemie, this is the largest synthetic macromolecule with defined shape and atomic structure reported to date.

Previously, the largest reported synthetic structures with a defined atomic structure were polystyrene polymers with a molecular mass of about 40 million Daltons. However, this value corresponds to a small fraction of the mass of large DNA molecules. Formation of a large synthetic molecule that also has a defined form is much more difficult. For biologists, however, it is routine. Even the simplest organism has a well-defined form, such as the rod-shaped tobacco mosaic virus. For chemists it is a model: a massive molecular ensemble with perfect control over its chemical structure, function, size, and molecular form.

Schlüter and co-workers have now presented a branched polymer that approximates the size and form of the tobacco mosaic virus. Their complex synthesis, which requires 170,000 bond-forming reactions in a single molecule, led to a structurally defined, linear macromolecule with a diameter of about 10 nm and a molecular weight of 200 million Daltons. It thus has a molar mass, cross section, and cylindrical form comparable to the tobacco mosaic virus.

The new macromolecule is a dendronized polymer: it consists of a linear backbone with highly and regularly branched side chains. "This is the biggest synthetic macromolecule with a defined chemical structure and defined form to date," according to Schlüter. "Our experiment is a first step toward the synthesis of molecular objects." A structure is considered to be an object if it keeps its form regardless of its environment, when its interior can be distinguished from the outer environment, and when there is a clear boundary between the two. There are many synthetic nano-objects, however these are not single molecules, but are aggregates of several or many individual molecules.

Author: A. Dieter Schlüter, ETH Zürich (Switzerland), www.polychem.mat.ethz.ch/people/head/dieters

Title: The Largest Synthetic Structure with Molecular Precision: Towards a Molecular Object

Angewandte Chemie International Edition, Permalink: dx.doi.org/10.1002/anie.201005164

####

For more information, please click here

Copyright © Angewandte Chemie

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 News Press

News and information

A nano-roundabout for light December 10th, 2016

Keeping electric car design on the right road: A closer look at the life-cycle impacts of lithium-ion batteries and proton exchange membrane fuel cells December 9th, 2016

Further improvement of qubit lifetime for quantum computers: New technique removes quasiparticles from superconducting quantum circuits December 9th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Exotic insulator may hold clue to key mystery of modern physics: Johns Hopkins-led research shows material living between classical and quantum worlds December 8th, 2016

Chemistry

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Possible Futures

A nano-roundabout for light December 10th, 2016

Keeping electric car design on the right road: A closer look at the life-cycle impacts of lithium-ion batteries and proton exchange membrane fuel cells December 9th, 2016

Further improvement of qubit lifetime for quantum computers: New technique removes quasiparticles from superconducting quantum circuits December 9th, 2016

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D: Up-close, real-time, chemical-sensitive 3-D imaging offers clues for reducing cost/improving performance of catalysts for fuel-cell-powered vehicles and other applications December 8th, 2016

Academic/Education

Oxford Nanoimaging report on how the Nanoimager, a desktop microscope delivering single molecule, super-resolution performance, is being applied at the MRC Centre for Molecular Bacteriology & Infection November 22nd, 2016

The University of Applied Sciences in Upper Austria uses Deben tensile stages as an integral part of their computed tomography research and testing facility October 18th, 2016

Enterprise In Space Partners with Sketchfab and 3D Hubs for NewSpace Education October 13th, 2016

New Agricultural Research Center Debuts at UCF October 12th, 2016

Announcements

A nano-roundabout for light December 10th, 2016

Keeping electric car design on the right road: A closer look at the life-cycle impacts of lithium-ion batteries and proton exchange membrane fuel cells December 9th, 2016

Further improvement of qubit lifetime for quantum computers: New technique removes quasiparticles from superconducting quantum circuits December 9th, 2016

Chemical trickery corrals 'hyperactive' metal-oxide cluster December 8th, 2016

Nanobiotechnology

Arrowhead Pharmaceuticals to Webcast Fiscal 2016 Year End Results December 7th, 2016

Fast, efficient sperm tails inspire nanobiotechnology December 5th, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Nanobiotix Provides Update on Global Development of Lead Product NBTXR3: Seven clinical trials across the world: More than 2/3 of STS patients recruited in the “act.in.sarc” Phase II/III trial: Phase I/II prostate cancer trial now recruiting in the U.S. November 28th, 2016

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