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Luminescent devices based on coordination polymers

Grant number: 18/09898-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): July 01, 2019
Effective date (End): December 31, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Regina Celia Galvao Frem
Grantee:Guilherme Arroyos
Home Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil


In this work, luminescent coordination polymers will be obtained and characterized aiming application in chemical sensing and light emitting devices. More specifically, Metal-Organic Frameworks (MOFs) are coordination polymers that contain cavities in the structure, and form a class of multifunctional porous materials. Infinite Coordination Polymers (ICPs) are similar to MOFs, but have low crystallinity. Among the several potential applications of these materials, gas storage, heterogeneous catalysis, drug release systems and sensing can be highlighted. Lanthanide-based luminescent MOFs (LnMOFs) are often studied for application in sensing and light emitting devices.As far as the use as a sensor is concerned, infinite coordination polymers, obtained during the academic master's degree, showing the general formula [Ln3(C3O4)(C5N2O4)(H2O)4] (Ln = Sm, Eu, Tb; C3O4 = malonate; C5N2O4 = 3,5-pyrazoldicarboxylate), will be utilized. These novel porous compounds have already demonstrated the ability to sensor CO2 gas and Cu (II) ions. As for the application of luminescent MOFs in light-emitting devices, both the compounds described above and the MOFs [Ln2(m-BDC)3(Phen)2] (DMF) (Ln = Eu, Gd, Tb; DMF = dimethylformamide) were chosen because of their high quantum yields and intense photoluminescence at various wavelengths of the visible region, depending on the amounts of each rare earth ion present in the structure. All the obtained compounds will be characterized by elemental analysis, infrared vibrational spectroscopy, thermogravimetric analysis, X-ray diffraction (powder and/or single crystal), electron scanning microscopy, nitrogen fisissorption and luminescence spectroscopy.The final part of the project should cover the production of thin films and composites based on these luminescent coordination solids, preferably using as substrates flexible materials such as bacterial cellulose, carboxymethylcellulose, polyethylene terephthalate, among others. Several growth strategies of the coordination polymers will be investigated in order to obtain particles of suitable size and morphology for the production of the films. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ARROYOS, GUILHERME; FREM, REGINA C. G. Luminescent spherical particles of lanthanide-based infinite coordination polymers with tailorable sizes. CrystEngComm, v. 22, n. 14, p. 2439-2446, APR 14 2020. Web of Science Citations: 0.

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