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 |
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Book Title |
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ISSN |
2041-6520 |
EISSN |
2041-6539 |
Conference Name |
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Bibtex ID |
ISI:000435858300003 |
Observations |
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