Regeneration of Light-Harvesting Complexes via Dynamic Replacement of Photodegraded Chromophores

All-synthetic molecular donor–acceptor complexes are designed, which are capable of counteracting the effect of photoinduced degradation of donor chromophores. Anionic gallium protoporphyrin IX (GaPP) and semiconducting carbon nanotube (CNT) are used as a model donor–acceptor complex, which is assem...

Full description

Saved in:
Bibliographic Details
Published in:ACS applied materials & interfaces 2015-04, Vol.7 (15), p.7833-7837
Main Authors: Zhang, Hanyu, Pan, Jing, Ghimire, Srijana, Bork, Matthew A, Riccitelli, Molly M, McMillin, David R, Choi, Jong Hyun
Format: Article
Language:English
Subjects:
Coloring Agents - chemistry
Coloring Agents - radiation effects
DNA - chemistry
DNA - radiation effects
Electric Conductivity
Electron Transport
Gallium - chemistry
Light
Light-Harvesting Protein Complexes - chemistry
Light-Harvesting Protein Complexes - radiation effects
Materials Testing
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - radiation effects
Protoporphyrins - chemistry
Protoporphyrins - radiation effects
Recycling - methods
Semiconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:All-synthetic molecular donor–acceptor complexes are designed, which are capable of counteracting the effect of photoinduced degradation of donor chromophores. Anionic gallium protoporphyrin IX (GaPP) and semiconducting carbon nanotube (CNT) are used as a model donor–acceptor complex, which is assembled using DNA oligonucleotides. The GaPP-DNA-CNT complex produces an anodic photocurrent in a photoelectrochemical cell, which steadily decays due to photo-oxidation. By modulating the chemical environment, we showed that the photodegraded chromophores may be dissociated from the complex, whereas the DNA-coated carbon nanotube acceptors are kept intact. Reassociation with fresh porphyrins leads to the full recovery of GaPP absorption and photocurrents. This strategy could form a basis for improving the light-harvesting performance of molecular donor–acceptor complexes and extending their operation lifetime.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.5b01924