@misc{10481/55335,
year = {2018},
month = {3},
url = {http://hdl.handle.net/10481/55335},
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 sp2 carbons are factors favoring the
nonlinear absorption. Electronic structure theoretical calculations support the interpretation of the results.},
organization = {This project has received funding from the European Research
Council (ERC) under the European Union's Horizon 2020
research and innovation program (ERC-2015-STG-677023). We
also thank the Ministerio de Economía y Competitividad
(MINECO, Spain) (CTQ2015-70283-P, CTQ2014-53598-R,
MAT2014-54231-C4-1P, FIS2016-77578-R) and the “Unidad de
Excelencia Química Aplicada a Biomedicina y Medioambiente
(UGR)”. A. G. C., C. S. S. and C. M. C. acknowledge funding from
MINECO (Spain) for RyC-2013-12943, IJCI-2014-19291 and
BES-2016-076371 contracts, respectively. I. R. M. thanks UGR
(Spain) for a postdoctoral scholarship. I. M. and E. M. thank the
Fundação para a Ciência e a Tecnologia for financial support
(IF/00759/2013 and post-doc grant SFRH/BPD/75782/2011). We
thank the CSIRC-Alhambra for supercomputing facilities.},
publisher = {Chemical science},
title = {Enantiopure distorted ribbon-shaped nanographene combining two-photon absorptionbased upconversion and circularly polarized luminescence},
doi = {10.1039/c8sc00427g},
author = {Moreno Cruz, Carlos and Márquez, Irene R. and Mariz, Inés F. A. and Blanco Izquierdo, Víctor and Sánchez-Sánchez, Carlos and Sobrado, Jesús M. and Martín-Gago, José A. and Cuerva, Juan M. and Maçôas, Ermelinda and González Campaña, Araceli},
}