Solid Materials with Near-Infrared-Induced Fluorescence Modulation
Otaegui, Jaume Ramon (Universitat Autònoma de Barcelona. Departament de Química)
Rubirola, Pau (Institut Català de Nanociència i Nanotecnologia)
Ruiz-Molina, Daniel (Institut Català de Nanociència i Nanotecnologia)
Hernando Campos, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Roscini, Claudio. (Institut Català de Nanociència i Nanotecnologia)

Date:	2020
Abstract:	Solid molecular materials modulating their luminescent properties upon irradiation are typically based on photochromic dyes. Despite these are potentially interesting for applications such as anticounterfeiting, bioimaging, optical data storage, and writable/erasable devices, key features are preventing their use in marketable products: the lack of straightforward strategies to obtain near infrared (NIR) radiation-responding photochromic dyes and the dramatic response modification these molecules suffer in solids. Herein a photochrome-free approach is reported to achieve solid materials whose luminescence modulation is induced by NIR radiation. This strategy is based on the capacity of phase change materials (PCMs) to modify the emission properties of fluorescent dyes upon photothermally induced interconversion between their solid and liquid states. The preparation of several NIR-responsive thermofluorochromic materials of high fatigue resistance and nondestructive readout is illustrated and this approach is extended to different commercially available dyes, taking advantage of distinct fluorescence modulation mechanisms, providing, thus, color tunability. The modulation response is straightforwardly tuned by simply varying the irradiation power density, the gold nanoshell concentration, and/or the PCM type. This tunability allows to accomplish NIR-activated multistate thermofluorochromic materials and fast/slow/irreversible responses in NIR-writings/drawings of good spatial resolution, which can be of interest for barcodings, anticounterfeiting technologies and (re)writable devices.
Grants:	Agencia Estatal de Investigación PID2019-106171RB-I00 Agencia Estatal de Investigación RTI2018-098027-B-C21 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-465 Agencia Estatal de Investigación SEV-2017-0706
Note:	Altres ajuts: CERCA Programme/Generalitat de Catalunya, AGAUR predoctoral FI fellowship
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Fluorescence ; Near-infrared ; Switchable fluorescent materials ; Photothermal effect ; Rewritable devices
Published in:	Advanced optical materials, Vol. 8, Issue 21 (November 2020) , p. 2001063, ISSN 2195-1071

DOI: 10.1002/adom.202001063

Postprint 32 p, 1.4 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Group in Electrochemistry, Photochemistry and Organic Reactivity (GEFRO)
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles