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@ARTICLE{Mahlmeister:593234,
      author       = {Mahlmeister, Bernhard and Schembri, Tim and Stepanenko,
                      Vladimir and Shoyama, Kazutaka and Stolte, Matthias and
                      Wuerthner, Frank},
      title        = {{E}nantiopure {J}-{A}ggregate of {Q}uaterrylene {B}isimides
                      for {S}trong {C}hiroptical {NIR}-{R}esponse},
      journal      = {Journal of the American Chemical Society},
      volume       = {145},
      number       = {24},
      issn         = {0002-7863},
      address      = {Washington, DC},
      publisher    = {ACS Publications},
      reportid     = {PUBDB-2023-05334},
      pages        = {13302 - 13311},
      year         = {2023},
      abstract     = {Chiral polycyclic aromatic hydrocarbons can be tailored for
                      next-generation photonic materials by carefully designing
                      their molecular as well as supramolecular architectures.
                      Hence, excitonic coupling can boost the chiroptical response
                      in extended aggregates but is still challenging to achieve
                      by pure self-assembly. Whereas most reports on these
                      potential materials cover the UV and visible spectral range,
                      systems in the near infrared (NIR) are underdeveloped. We
                      report a new quaterrylene bisimide derivative with a
                      conformationally stable twisted π-backbone enabled by the
                      sterical congestion of a fourfold bay-arylation. Rendering
                      the π-subplanes accessible by small imide substituents
                      allows for a slip-stacked chiral arrangement by kinetic
                      self-assembly in low polarity solvents. The well dispersed
                      solid-state aggregate reveals a sharp optical signature of
                      strong J-type excitonic coupling in both absorption (897 nm)
                      and emission (912 nm) far in the NIR region and reaches
                      absorption dissymmetry factors up to 1.1 × 10$^{–2}$. The
                      structural elucidation was achieved by atomic force
                      microscopy and single-crystal X-ray analysis which we
                      combined to derive a structural model of a fourfold stranded
                      enantiopure superhelix. We could deduce that the role of
                      phenyl substituents is not only granting stable axial
                      chirality but also guiding the chromophore into a chiral
                      supramolecular arrangement needed for strong excitonic
                      chirality.},
      cin          = {DOOR ; HAS-User},
      ddc          = {540},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3) / DFG project 444286426 -
                      Hybrid-Spektrometer (444286426)},
      pid          = {G:(DE-HGF)POF4-6G3 / G:(GEPRIS)444286426},
      experiment   = {EXP:(DE-H253)P-P11-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {37285519},
      UT           = {WOS:001008513400001},
      doi          = {10.1021/jacs.3c03367},
      url          = {https://bib-pubdb1.desy.de/record/593234},
}