Volltext-Downloads (blau) und Frontdoor-Views (grau)

Rhodamine 6G and 800 intermolecular heteroaggregates embedded in PMMA for near-infrared wavelength shifting

  • The opto-electronic properties of small-molecules and functional dyes usually differ when incorporated into solid matrices with respect to their isolated form due to an aggregation phenomenon that alters their optical and fluorescent properties. These spectroscopic modifications are studied in the framework of the exciton theory of aggregates, which has been extensively applied in the literature for the study of molecular aggregates of the same type of molecules (homoaggregation). Despite the demonstrated potential of the control of the heteroaggregation process (aggregation of different types of molecules), most of the reported works are devoted to intramolecular aggregates, complex molecules formed by several chromophores attached by organic linkers. The intramolecular aggregates are specifically designed to hold a certain molecular structure that, on the basis of the exciton theory, modifies their optical and fluorescent properties with respect to the isolated chromophores that form the molecule. The present article describes in detail the incorporation of Rhodamine 6G (Rh6G) and 800 (Rh800) into polymeric matrices of poly-(methyl methacrylate), PMMA. The simultaneous incorporation of both dyes results in an enhanced fluorescent emission in the near-infrared (NIR), originating from the formation of ground-state Rh6G–Rh800 intermolecular heteroaggregates. The systematic control of the concentration of both rhodamines provides a model system for the elucidation of the heteroaggregate formation. The efficient energy transfer between Rh6G and Rh800 molecules can be used as wavelength shifters to convert effectively the light from visible to NIR, a very convenient wavelength range for many practical applications which make use of inexpensive commercial detectors and systems.

Download full text files

Export metadata

Additional Services

Share in Twitter Search Google Scholar


Document Type:Article
Author:Javier Castillo-SeoaneORCiD, Lola Gonzalez-GarciaORCiD, José M. Obrero-Perez, Francisco J. Aparicio, Ana BorrásORCiD, Agustín R. González-ElipeORCiD, Àngel BarrancoORCiD, Juan R. Sanchez-ValenciaORCiD
Parent Title (English):Journal of Materials Chemistry C
First Page:7119
Last Page:7131
Year of first Publication:2022
Release Date:2022/05/16
Tag:PMMA; Rh6G-Rh800; UV-Vis absorption study
Impact:07.393 (2021)
Funding Information:Research funded by European Commission (EU through cohesion fund and FEDER 2014–2020H2020 program, grant agreement 851929 (ERC Startin) Universidad de Sevilla (VI PPIT-US) Consejería de Economía, Innovación, Ciencia y Empleo Junta de Andalucía (AT17-6079EMERGIA programP18-RT-3480US-1263142US-1381057)
DDC classes:600 Technik, Medizin, angewandte Wissenschaften / 660 Technische Chemie
Open Access:Open Access
Signature:INM 2022/049
Licence (German):License LogoCreative Commons - CC BY-NC - Namensnennung - Nicht kommerziell 4.0 International