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DNA‐Organized Light‐Harvesting Antennae: Energy Transfer in Polyaromatic Stacks Proceeds through Interposed Nucleobase Pairs
Author(s) -
Bösch Caroline D.,
Abay Elif,
Langenegger Simon M.,
Nazari Maryam,
Cannizzo Andrea,
Feurer Thomas,
Häner Robert
Publication year - 2019
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201900148
Subject(s) - chemistry , phenanthrene , phenanthrenes , chromophore , nucleobase , pyrene , acceptor , photochemistry , energy transfer , excitation , base pair , dna , chemical physics , organic chemistry , biochemistry , physics , engineering , electrical engineering , condensed matter physics
DNA‐based light‐harvesting antennae with varying arrangements of light‐absorbing phenanthrene donor units and a pyrene acceptor dye were synthesized and tested for their light‐harvesting properties. Excitation of phenanthrene is followed by rapid transfer of the excitation energy to the pyrene chromophore. A block of six light‐absorbing phenanthrenes was separated from the site of the acceptor in a stepwise manner by an increasing number of intervening AT base pairs. Energy transfer occurs through interposed AT base pairs and is still detected when the phenanthrene antenna is separated by 5 AT base pairs.