Featured Research

from universities, journals, and other organizations

Understanding light-driven molecular switches

Date:
May 20, 2010
Source:
Ruhr-Universitaet-Bochum
Summary:
Light-driven molecular switches are already used in technical devices such as LCD displays and storage media. Full comprehension of the processes at a molecular scale is required to increase their efficiency, but this knowledge had not been available to date. By computer simulation studies, a consortium of theoretical chemists and physicists has now managed to reconstruct the exact course of the light-driven molecular changes and gain insight into the switching process. This enables targeted chemical design of light-controllable nanotechnological devices.

Light-driven molecular switches are already used in technical devices such as LCD displays and storage media. Full comprehension of the processes at a molecular scale is required to increase their efficiency, but this knowledge had not been available to date.

By computer simulation studies, a consortium of theoretical chemists and physicists from the Ruhr-University Bochum and King's College London has now managed to reconstruct the exact course of the light-driven molecular changes and gain insight into the switching process. This enables targeted chemical design of light-controllable nanotechnological devices. Dr. Marcus Böckmann, Prof. Dominik Marx (RUB) and Dr. Nikos Doltsinis (King's College) have published their findings in Angewandte Chemie International Edition.

The colour of light causes the molecule to switch over

Chemically modified azobenzene was used for the computer simulation based on the laws of quantum mechanics. The azobenzene molecule can have two forms and vary between them, different coloured light triggering the switching processes.

The researchers carried out a detailed computer simulation study of the switchover processes of the two molecular forms, attaining unprecedented insight into the atomic resolution. Dr. Markus Böckmann explained that it is important that the switching process is fast and highly efficient in all devices in which it is used.

Recent experiments have shown that particular chemical modifications in azobenzene can significantly enhance this process. However, to date the reasons for this improvement have not been understood.

The computer simulation study could explain the experimental results for the first time. The researchers reported that they have been able to establish a clear relationship between the structure and switching properties of the molecule. This is a decisive step for the chemical design of azobenzene-based light-driven nanotechnological devices and thus the development of improved light-controlled materials.


Story Source:

The above story is based on materials provided by Ruhr-Universitaet-Bochum. Note: Materials may be edited for content and length.


Journal Reference:

  1. Marcus Böckmann, Nikos L. Doltsinis, Dominik Marx. Unraveling a Chemically Enhanced Photoswitch: Bridged Azobenzene. Angewandte Chemie, 2010; DOI: 10.1002/ange.200907039

Cite This Page:

Ruhr-Universitaet-Bochum. "Understanding light-driven molecular switches." ScienceDaily. ScienceDaily, 20 May 2010. <www.sciencedaily.com/releases/2010/05/100520093204.htm>.
Ruhr-Universitaet-Bochum. (2010, May 20). Understanding light-driven molecular switches. ScienceDaily. Retrieved April 23, 2014 from www.sciencedaily.com/releases/2010/05/100520093204.htm
Ruhr-Universitaet-Bochum. "Understanding light-driven molecular switches." ScienceDaily. www.sciencedaily.com/releases/2010/05/100520093204.htm (accessed April 23, 2014).

Share This



More Matter & Energy News

Wednesday, April 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Is North Korea Planning Nuclear Test #4?

Is North Korea Planning Nuclear Test #4?

Newsy (Apr. 22, 2014) — South Korean officials say North Korea is preparing to conduct another nuclear test, but is Pyongyang just bluffing this time? Video provided by Newsy
Powered by NewsLook.com
China Falls for 4x4s at Beijing Auto Show

China Falls for 4x4s at Beijing Auto Show

AFP (Apr. 22, 2014) — The urban 4x4 is the latest must-have for Chinese drivers, whose conversion to the cult of the SUV is the talking point of this year's Beijing auto show. Duration: 00:40 Video provided by AFP
Powered by NewsLook.com
Lytro Introduces 'Illum,' A Professional Light-Field Camera

Lytro Introduces 'Illum,' A Professional Light-Field Camera

Newsy (Apr. 22, 2014) — The light-field photography engineers at Lytro unveiled their next innovation: a professional DSLR-like camera called "Illum." Video provided by Newsy
Powered by NewsLook.com
3 Reasons Why Harley Davidson Is Selling Tons of Epic Hogs

3 Reasons Why Harley Davidson Is Selling Tons of Epic Hogs

TheStreet (Apr. 22, 2014) — Sales of motorcycles have continued to ride back from the depths of hell known as the Great Recession. Excluding scooters, sales of motorcycles increased 3% in 2013. In units, however, at 465,000 sold last year, the total remained about 50% below the peak hit in 2007. Industry leader Harley Davidson’s shareholders have benefited both by the industry recovery and positive headlines emanating from the company. Belus Capital Advisors CEO Brian Sozzi takes you beyond the headlines of the motorcycle maker. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins