Article (Scientific journals)
Metal-Organic Framework with Color-Switching and Strongly Polarized Emission
Wang, Hui; Vagin, Sergei Igorevich; Lane, Stephen et al.
2019In Chemistry of Materials, 31 (15), p. 5816 - 5823
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Keywords :
Conjugated backbones; Intermolecular interactions; Metal organic framework; Metal organic materials; Metalorganic frameworks (MOFs); Polarized fluorescence; Polarized luminescence; Structural stabilities; Chemistry (all); Chemical Engineering (all); Materials Chemistry; General Chemical Engineering; General Chemistry
Abstract :
[en] Hybrid fluorescent metal-organic frameworks (MOFs) use long-range intermolecular structural motifs in which the properties of the scaffold molecular system can be designed for specific applications. In this work, we constructed a MOF-chromophore system with a strongly polarized fluorescence and a large emission wavelength shift. To achieve this, we first devised a fluorophore with a linear conjugated backbone, bulky and noninteracting side chains, and easily accessible nitrogen atoms on its pyridine end groups. The linear nature of the conjugated backbone can lead to a strongly polarized luminescence, the side groups assist structural stability and minimize intermolecular interactions, and the sterically accessible pyridines provide a large fluorescence color-changing ability. These features were demonstrated by synthesizing a planar Zn-based MOF in which the linear backbone of the chromophore molecules was highly aligned. The MOFs demonstrated a strong polarization effect and a color-shifting ability from green-yellow to orange. The results show that hybrid metal-organic materials can be designed to generate a strong command of the material luminescence, in terms of both emission color and polarization.
Disciplines :
Chemistry
Author, co-author :
Wang, Hui;  Department of Physics, University of Alberta, Edmonton, Canada
Vagin, Sergei Igorevich;  Department of Chemistry, Technical University of Munich, Garching bei München, Germany
Lane, Stephen;  Department of Physics, University of Alberta, Edmonton, Canada
Lin, Wei;  Department of Physics, University of Alberta, Edmonton, Canada
Shyta, Vira;  Department of Physics, University of Alberta, Edmonton, Canada
Heinz, Werner Reinhold;  Department of Chemistry, Technical University of Munich, Garching bei München, Germany
Van Dyck, Colin  ;  Université de Mons - UMONS > Faculté des Sciences > Service Chimie Physique Théorique
Bergren, Adam Johan;  Nanotechnology Research Centre, National Research Council of Canada, Edmonton, Canada
Gardner, Kirsty;  Department of Physics, University of Alberta, Edmonton, Canada
Rieger, Bernhard ;  Department of Chemistry, Technical University of Munich, Garching bei München, Germany
Meldrum, Alkiviathes ;  Department of Physics, University of Alberta, Edmonton, Canada
Language :
English
Title :
Metal-Organic Framework with Color-Switching and Strongly Polarized Emission
Publication date :
13 August 2019
Journal title :
Chemistry of Materials
ISSN :
0897-4756
eISSN :
1520-5002
Publisher :
American Chemical Society
Volume :
31
Issue :
15
Pages :
5816 - 5823
Peer reviewed :
Peer Reviewed verified by ORBi
Research institute :
Matériaux
Funders :
National Research Council Canada
Deutsche Forschungsgemeinschaft
University of Alberta
Natural Sciences and Engineering Research Council of Canada
Funding text :
The authors thank DFG (IRTG 2022) and NSERC (CREATE grant 463990-2015) for financial support of the Alberta/Technische Universität München Graduate School for Functional Hybrid Materials (ATUMS) and Future Energy Systems. This work was supported in part by the Nanotechnology Initiative, a collaboration between the National Research Council, Canada, and the University of Alberta. C.V.D. thanks the Laboratory for Chemistry of Novel Materials at the Université de Mons in Belgium for access to their computing facilities.
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