Research & Development World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE

Biomimetics Play Chemical Tricks on the Blood

By Vienna University of Technology | November 8, 2018

The molecules have been analyzed at different pressures (from ultra high vacuum to atmospheric pressure). Image: TU Wien

The job of hemoglobin in our body seems to be quite simple: It transports oxygen molecules through our bloodstream. But this only works so well because the hemoglobin molecule is extremely complex. The same applies to chlorophyll, which converts sunlight into energy for plants.

In order to understand the subtle tricks of such complex molecules, it is worth investigating similar but simpler structures in the lab. In a cooperation between TU Wien (Vienna) and research groups from Trieste, phthalocyanines have now been studied, whose molecular ring structure closely resembles the crucial sections of hemoglobin or chlorophyll. It turned out that the center of these ring structures can be switched into different states with the help of green light, which affects their chemical behavior.

Not only does this help to understand biological processes, it also opens up new possibilities for using the tricks of nature in the laboratory for other purposes — a strategy called “biomimetics” that is becoming increasingly important all around the world.

“The phthalocyanines that we study are colorful dyes with a characteristic ring structure,” says Professpr Günther Rupprechter from the Institute of Material Chemistry at the Vienna University of Technology.

“Crucial to this ring structure is that it can hold an iron atom in its center — just like the heme, the ring-shaped red dyes in hemoglobin. Chlorophyll, on the other hand, has a similar ring that captures magnesium atoms. “

In contrast to the more complicated natural molecules, the custom-made phthalocyanine dyes can be regularly placed side by side on a surface, such as tiles on the bathroom wall.

“The rings were placed on a graphene layer in a regular pattern, so that a two-dimensional crystal of dye rings was created,” says Matteo Roiaz, who conducted the experiments together with Christoph Rameshan.

“This has the advantage that we can examine many molecules at the same time, which gives us much stronger measurement signals,” explains Christoph Rameshan.

Carbon monoxide molecules served as probes for investigating these rings: one molecule can attach to the iron atom, which is held in the center of the ring. From the vibration of the carbon monoxide molecule one can gain information about the state of the iron atom.

To study the vibration, the molecule was irradiated with laser light — using a combination of green and infrared light. This measurement yielded a result that seemed strongly counterintuitive at first glance.

“We did not simply measure a single vibrational frequency of carbon monoxide, instead we found four different frequencies. No one had expected this,” says Günther Rupprechter.

“The iron atoms are all identical, so the CO molecules attached to them should all show exactly the same behavior.”

As it turned out, the green light of the laser was responsible for a remarkable effect: at first, all the iron atoms were indeed identical, but the interaction with green light can switch them to different states.

“This also changes the oscillation frequency of the CO molecule on the iron atom, which shows us how sensitively such structures react to tiny changes,” says Günther Rupprechter.

“That is also the reason the biomolecules in our bodies have such a complex structure: the widely branched protein components have a minimal impact on the states of the metal atom, but this minimal impact can have very important implications.”

Until now, similar effects could only be studied at extremely low temperatures and in ultrahigh vacuum.
 

“In the laboratory, we now have two methods in which such biologically relevant phenomena can be measured at room temperature and atmospheric pressure, with and without green light,” emphasizes Rupprechter.

This opens up new possibilities for a better understanding of the chemical behavior of biological substances; it could also open up the opportunity to tailor novel molecules in order to optimize them for nature-specific chemical purposes.

Source: Vienna University of Technology

Related Articles Read More >

Illustration of ultracold atoms (gold) flowing frictionlessly along a laser boundary (green), representing the quantum phenomenon of edge states.
MIT physicists directly observe frictionless ‘edge state’ flow in ultracold atoms, offering a glimpse of super-efficient electronics
NTT Research scientist in cleanroom suit working on advanced photonic equipment
NTT Research bets light-based computing can tackles AI’s energy crisis
Scientists claim to generate world’s strongest terahertz radiation
SLAC fires up the world’s most powerful X-ray laser: LCLS-II ushers in a new era of science
rd newsletter
EXPAND YOUR KNOWLEDGE AND STAY CONNECTED
Get the latest info on technologies, trends, and strategies in Research & Development.
RD 25 Power Index

R&D World Digital Issues

Fall 2024 issue

Browse the most current issue of R&D World and back issues in an easy to use high quality format. Clip, share and download with the leading R&D magazine today.

Research & Development World
  • Subscribe to R&D World Magazine
  • Enews Sign Up
  • Contact Us
  • About Us
  • Drug Discovery & Development
  • Pharmaceutical Processing
  • Global Funding Forecast

Copyright © 2025 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search R&D World

  • R&D World Home
  • Topics
    • Aerospace
    • Automotive
    • Biotech
    • Careers
    • Chemistry
    • Environment
    • Energy
    • Life Science
    • Material Science
    • R&D Management
    • Physics
  • Technology
    • 3D Printing
    • A.I./Robotics
    • Software
    • Battery Technology
    • Controlled Environments
      • Cleanrooms
      • Graphene
      • Lasers
      • Regulations/Standards
      • Sensors
    • Imaging
    • Nanotechnology
    • Scientific Computing
      • Big Data
      • HPC/Supercomputing
      • Informatics
      • Security
    • Semiconductors
  • R&D Market Pulse
  • R&D 100
    • Call for Nominations: The 2025 R&D 100 Awards
    • R&D 100 Awards Event
    • R&D 100 Submissions
    • Winner Archive
    • Explore the 2024 R&D 100 award winners and finalists
  • Resources
    • Research Reports
    • Digital Issues
    • R&D Index
    • Subscribe
    • Video
    • Webinars
  • Global Funding Forecast
  • Top Labs
  • Advertise
  • SUBSCRIBE