@article{922e3811b7734321bcf3b6830b5387bc,
title = "Europium amphiphilic naphthalene based complex for the enhancement of linearly polarized luminescence in Langmuir-Blodgett films",
abstract = "Linearly polarized luminescence (LPL) in films of europium ions was induced by using naphthoic acid adopted alkyl chain (NaphC15), which plays the roles of both surfactant and photo-antenna. The synthesis of NaphC15 was newly developed, and the Eu complex composed in a 1:3 ratio of Eu3+ ion and NaphC15 was synthesized in the powder form for comparison. The structural aspects of LB films with a layered scheme were obtained from the measurements of synchrotron XRPD, X-ray photoelectron spectroscopy and waveguide polarized absorption spectra. Luminescence of europium in the film is more intense than that in the powdered complex. The luminescence efficiency calculated from the observed luminescence lifetimes and quantum yields also supported their structure-enhanced luminescence. Finally, we revealed that the LPL was sensitized by the electronic dipole moment localized on the NaphC15 moieties aligned independently in the Langmuir-Blodgett films.",
author = "Koushi Yoshihara and Masamichi Yamanaka and Shuhei Kanno and Soichi Mizushima and Junko Tsuchiyagaito and Kazuki Kondo and Takahiro Kondo and Daichi Iwasawa and Hiroaki Komiya and Akira Saso and Shogo Kawaguchi and Kenta Goto and Shuhei Ogata and Hiromi Takahashi and Ayumi Ishii and Miki Hasegawa",
note = "Funding Information: The authors acknowledge Prof. Mir Wais Hosseini (University of Strasbourg) for helpful discussions. Professors Makoto Handa and Michiko Egawa (Shimane University) also gave important discussion. This work was partly supported by Grants-in-Aid for Scientific Research on Innovative Areas of {\textquoteleft}{\textquoteleft}Soft Crystals (Area Number: 2903){\textquoteright}{\textquoteright} (No. 17H06374; MH and MY), MEXT Supported Program for the Strategic Research Foundation at Private Universities (2013-2017; MH), Network Joint Research Centre for Materials and Devices (2018; MH) and a SOKEN Project provided by Aoyama Gakuin University Research Institute (2016–2017; MH). MH also thanks Izumi Science and Technology Foundation for their financial support. AI acknowledges the support of the FRONTIER project, JST PRESTO. The synchrotron radiation experiments were performed at the BL02B2 of SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (Proposal No. 2017A1648, 2017A1380, 2017B1268, 2016B1342, 2016B1706, 2016A1336, 2016A1333, 2014B1316, 2013B1776, 2013B1679, and 2013A1020). Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.",
year = "2019",
doi = "10.1039/c8nj03976c",
language = "English",
volume = "43",
pages = "6472--6479",
journal = "New Journal of Chemistry",
issn = "1144-0546",
publisher = "Royal Society of Chemistry",
number = "17",
}