Enhanced Electrochromic Smart Windows Based on Supramolecular Viologen Tweezers
Otaegui, Jaume Ramon (Universitat Autònoma de Barcelona. Departament de Química)
Dorsainvil, Jovelt M. (Washington University in St. Louis (Estats Units d'Amèrica))
Guirado López, Gonzalo (Universitat Autònoma de Barcelona. Departament de Química)
Ruiz-Molina, Daniel (Institut Català de Nanociència i Nanotecnologia)
Hernando Campos, Jordi (Universitat Autònoma de Barcelona. Departament de Química)
Barnes, Jonathan C. (Washington University in St. Louis (Estats Units d'Amèrica))
Roscini, Claudio (Institut Català de Nanociència i Nanotecnologia)
Mena Fernández, Silvia (Universitat Autònoma de Barcelona. Departament de Química)

Date:	2025
Description:	10 pàg.
Abstract:	Extending the spectral response of viologen-based electrochromic devices to the near-infrared region is essential to enhance their performance for smart window applications. Although synthetic and formulation modifications have been proposed to achieve this goal, these strategies always come at the expense of deteriorating the electrochromic behavior of the system. To overcome this limitation, herein we exploited the supramolecular chemistry of viologen molecular tweezers, which undergo an intramolecular dimerization process upon reduction that leads to broad light absorption through the visible and near-infrared spectra. We observed this behavior to take place at low concentrations in a variety of electrolytic media, including solid-state ionogels that could be applied to the fabrication of electrochromic devices. Better spectral response, lower operation voltage, and higher stability were measured for these devices relative to analogous systems based on viologen monomers. As a result, when used as electrochromic smart windows, the viologen tweezer-based devices exhibited enhanced modulation of solar heat gain with reduced energy consumption, thereby demonstrating the potential of viologen supramolecular chemistry to rationally improve the performance of electrochromic devices.
Grants:	Agencia Estatal de Investigación PID2021-127983OB-C21 Agencia Estatal de Investigación PID2022-141293OB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00052 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00064
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Radical-cation ; Reduction ; Devices ; Driven ; Ion ; Dispersion ; Thiophene ; SDG 7 - Affordable and Clean Energy
Published in:	Chemistry of materials, Vol. 37 Núm. 6 (2025) , p. 2220-2229, ISSN 1520-5002

DOI: 10.1021/acs.chemmater.4c03174
PMID: 40453566

10 p, 4.7 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