| Publication Type |
Journal Article |
| Title |
Enantiopure distorted ribbon-shaped nanographene combining two-photon absorption-based upconversion and circularly polarized luminescence |
| Authors |
Carlos M. Cruz Irene R. Marquez Ines de Fatima A. Mariz Victor Blanco Carlos Sanchez-Sanchez Jesus M. Sobrado Jose A. Martin-Gago Juan M. Cuerva Ermelinda Macoas Araceli G. Campana |
| Groups |
MPPM |
| Journal |
CHEMICAL SCIENCE |
| Year |
2018 |
| Month |
April |
| Volume |
9 |
| Number |
16 |
| Pages |
3917-3924 |
| Abstract |
Herein we describe a distorted ribbon-shaped nanographene exhibiting unprecedented combination of optical properties in graphene-related materials, namely upconversion based on two-photon absorption (TPA-UC) together with circularly polarized luminescence (CPL). The compound is a graphene molecule of ca. 2 nm length and 1 nm width with edge defects that promote the distortion of the otherwise planar lattice. The edge defects are an aromatic saddle-shaped ketone unit and a [5]carbohelicene moiety. This system is shown to combine two-photon absorption and circularly polarized luminescence and a remarkably long emission lifetime of 21.5 ns. The [5]helicene is responsible for the chiroptical activity while the push-pull geometry and the extended network of sp(2) carbons are factors favoring the nonlinear absorption. Electronic structure theoretical calculations support the interpretation of the results. |
| DOI |
http://dx.doi.org/10.1039/c8sc00427g |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
2041-6520 |
| EISSN |
2041-6539 |
| Conference Name |
|
| Bibtex ID |
ISI:000435858300003 |
| Observations |
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