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@ARTICLE{Lensen:856722,
      author       = {Lensen, Marga C. and Nolte, Roeland J. M. and Rowan, Alan
                      E. and Pyckhout-Hintzen, Wim and Feiters, Martin C. and
                      Elemans, Johannes A. A. W.},
      title        = {{S}elf-assembly of porphyrin hexamers via bidentate
                      metal–ligand coordination},
      journal      = {Dalton transactions},
      volume       = {47},
      number       = {40},
      issn         = {0300-9246},
      address      = {London},
      publisher    = {Soc.},
      reportid     = {FZJ-2018-06073},
      pages        = {14277 - 14287},
      year         = {2018},
      abstract     = {The supramolecular assembly of metal-porphyrin hexamers
                      with bidentate ligands in chloroform solutions is
                      demonstrated by UV/Vis and 1H NMR-titrations, and Small
                      Angle Neutron Scattering (SANS) experiments. Titrations of
                      zinc porphyrin hexamer Zn1 with
                      1,4-diazabicyclo[2,2,2]octane (DABCO) revealed that at a
                      DABCO/Zn1 molar ratio of 3, intermolecular sandwich
                      complexes are formed, which can be considered as
                      “circular-shaped porphyrin ladders”. These
                      supramolecular complexes further aggregate into larger
                      polymeric stacks, as a result of a combination of
                      cooperativity effects, pi−pi stacking interactions, and
                      chelate effects. The presence of rodlike assemblies in
                      solution, formed by assembly of Zn1 and DABCO, is confirmed
                      by SANS-experiments. Using a model for cylindrical
                      assemblies, curve fitting calculations reveals that rods
                      with an average length of 26 nm and a radius of 30-35 Å
                      were formed, corresponding to columnar stacks of
                      approximately 30 hexamer molecules. In contrast, the
                      metal-free hexamer $H_2$ 1 did not form extended assemblies
                      due to the absence of coordinative intermolecular
                      interactions.},
      cin          = {JCNS-FRM-II / Neutronenstreuung ; JCNS-1},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-1-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29881835},
      UT           = {WOS:000447708900015},
      doi          = {10.1039/C8DT01572D},
      url          = {https://juser.fz-juelich.de/record/856722},
}