@misc{WęcławskiTasiorHammannetal.2014,
  author    = {Węcławski, Marek K. and Tasior, Mariusz and Hammann, Tommy and Cywiński, Piotr J. and Gryko, Daniel T.},
  title     = {From π-expanded coumarins to π-expanded pentacenes},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-98822},
  pages     = {4},
  year      = {2014},
  abstract  = {The synthesis of two novel types of π-expanded coumarins has been developed. Modified Knoevenagel bis-condensation afforded 3,9-dioxa-perylene-2,8-diones. Subsequent oxidative aromatic coupling or light driven electrocyclization reaction led to dibenzo-1,7-dioxacoronene-2,8-dione. Unparalleled synthetic simplicity, straightforward purification and superb optical properties have the potential to bring these perylene and coronene analogs towards various applications.},
  language  = {en}
}
@misc{TasiorBaldDeperasińskaetal.2015,
  author    = {Tasior, Mariusz and Bald, Ilko and Deperasińska, Irena and Cywiński, Piotr J. and Gryko, Daniel T.},
  title     = {An internal charge transfer-dependent solvent effect in V-shaped azacyanines},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-102704},
  pages     = {11714 -- 11720},
  year      = {2015},
  abstract  = {New V-shaped non-centrosymmetric dyes, possessing a strongly electron-deficient azacyanine core, have been synthesized based on a straightforward two-step approach. The key step in this synthesis involves palladium-catalysed cross-coupling of dibromo-N,N′-methylene-2,2′-azapyridinocyanines with arylacetylenes. The resulting strongly polarized π-expanded heterocycles exhibit green to orange fluorescence and they strongly respond to changes in solvent polarity. We demonstrate that differently electron-donating peripheral groups have a significant influence on the internal charge transfer, hence on the solvent effect and fluorescence quantum yield. TD-DFT calculations confirm that, in contrast to the previously studied bis(styryl)azacyanines, the proximity of S1 and T2 states calculated for compounds bearing two 4-N,N-dimethylaminophenylethynyl moieties establishes good conditions for efficient intersystem crossing and is responsible for its low fluorescence quantum yield. Non-linear properties have also been determined for new azacyanines and the results show that depending on peripheral groups, the synthesized dyes exhibit small to large two-photon absorption cross sections reaching 4000 GM.},
  language  = {en}
}
@article{TasiorBaldDeperasinskaetal.2015,
  author    = {Tasior, Mariusz and Bald, Ilko and Deperasinska, Irena and Cywinski, Piotr J. and Gryko, Daniel T.},
  title     = {An internal charge transfer-dependent solvent effect in V-shaped azacyanines},
  series = {Organic \& biomolecular chemistry : an international journal of synthetic, physical and biomolecular organic chemistry},
  volume    = {13},
  journal   = {Organic \& biomolecular chemistry : an international journal of synthetic, physical and biomolecular organic chemistry},
  number    = {48},
  publisher = {Royal Society of Chemistry},
  address   = {Cambridge},
  issn      = {1477-0520},
  doi       = {10.1039/c5ob01633a},
  pages     = {11714 -- 11720},
  year      = {2015},
  language  = {en}
}