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Precisely tuneable energy transfer system using peptoid helix-based molecular scaffold
Kang, B Yang, W Lee, S Mukherjee, S Forstater, J Kim, H Goh, B Kim, TY Voelz, VA Pang, Y
Kang, B
Yang, W
Lee, S
Mukherjee, S
Forstater, J
Kim, H
Goh, B
Kim, TY
Voelz, VA
Pang, Y
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Journal Article
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2017-12-01
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10.1038/s41598-017-04727-0
Abstract
© 2017 The Author(s). The energy flow during natural photosynthesis is controlled by maintaining the spatial arrangement of pigments, employing helices as scaffolds. In this study, we have developed porphyrin-peptoid (pigment-helix) conjugates (PPCs) that can modulate the donor-acceptor energy transfer efficiency with exceptional precision by controlling the relative distance and orientation of the two pigments. Five donor-acceptor molecular dyads were constructed using zinc porphyrin and free base porphyrin (Zn(i + 2)-Zn(i + 6)), and highly efficient energy transfer was demonstrated with estimated efficiencies ranging from 92% to 96% measured by static fluorescence emission in CH2Cl2 and from 96.3% to 97.6% using femtosecond transient absorption measurements in toluene, depending on the relative spatial arrangement of the donor-acceptor pairs. Our results suggest that the remarkable precision and tunability exhibited by nature can be achieved by mimicking the design principles of natural photosynthetic proteins.
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