Detection of singlet oxygen formation inside photoactive biohybrid composite material

Kata Hajdu, Ateeq Ur Rehman, I. Vass, László Nagy

Research output: Contribution to journalArticle

Abstract

Photosynthetic reaction center proteins (RCs) are the most efficient light energy converter systems in nature. The first steps of the primary charge separation in photosynthesis take place in these proteins. Due to their unique properties, combining RCs with nano-structures promising applications can be predicted in optoelectronic systems. In the present work RCs purified from Rhodobacter sphaeroides purple bacteria were immobilized on multiwalled carbon nanotubes (CNTs). Carboxyl-and amine-functionalised CNTs were used, so different binding procedures, physical sorption and chemical sorption as well, could be applied as immobilization techniques. Light-induced singlet oxygen production was measured in the prepared photoactive biocomposites in water-based suspension by histidine mediated chemical trapping. Carbon nanotubes were applied under different conditions in order to understand their role in the equilibration of singlet oxygen concentration in the suspension. CNTs acted as effective quenchers of 1O2 either by physical (resonance) energy transfer or by chemical (oxidation) reaction and their efficiency showed dependence on the diffusion distance of 1O2.

Original languageEnglish
Article number28
JournalMaterials
Volume11
Issue number1
DOIs
Publication statusPublished - Dec 26 2017

Fingerprint

Singlet Oxygen
Carbon Nanotubes
Carbon nanotubes
Oxygen
Sorption
Suspensions
Composite materials
Photosynthetic Reaction Center Complex Proteins
Proteins
Photosynthesis
Multiwalled carbon nanotubes (MWCN)
Histidine
Optoelectronic devices
Energy transfer
Amines
Oxidation
Water

Keywords

  • Multiwalled carbon nanotubes
  • Photoactive nanocomposites
  • Photosynthetic reaction center
  • Singlet oxygen

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Detection of singlet oxygen formation inside photoactive biohybrid composite material. / Hajdu, Kata; Rehman, Ateeq Ur; Vass, I.; Nagy, László.

In: Materials, Vol. 11, No. 1, 28, 26.12.2017.

Research output: Contribution to journalArticle

Hajdu, Kata ; Rehman, Ateeq Ur ; Vass, I. ; Nagy, László. / Detection of singlet oxygen formation inside photoactive biohybrid composite material. In: Materials. 2017 ; Vol. 11, No. 1.
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