"Multi-Funtional Crystalline Materials Based on Lanthanide-Sulfonate Coordination Polymers"

RICHARD FERNANDO D'VRIES; GERMÁN E. GOMEZ; DIEGO LIONELLO; IHOSVANY CAMPS; MARÍA CECILIA FUERTES; GALO J. A. A. SOLER-ILLIA; JAVIER ELLENA

Mérida

Congreso; II Reunión Latinoamericana de Cristalogfrafía; 2016

Abstract. In this work we present a complete study about the synthesis, structure and its relationship with mechanical and optical properties of a new family of lanthanide coordination polymers. Three new phases were widely characterized and its structure reported. Nanoidentation and photoluminiscence analyses were performed in order to find a relationship between the structural features with the mechanical, optical and sensing properties. Palabras clave: Lanthanide Coordination-Polymer; Nanoidentation; Photoluminiscence; Chemical Sensor.As it was demonstrated in previous reports, the capacity of the disulfonaphthalene molecules to form coordination compounds with a variety of structures, dimensionalities and topologies, give rise interesting materials with potential applications in catalysis [1], gas absorption [2] and luminescence-based devices [3]. These materials also have novel magnetic and conductivity properties [4]. In this work, a series of coordination polymers (CPs) formed in optimized hydrothermal conditions from lanthanide metals, 3-hydroxinaphthalene-2,7-disulfonate(3-OHNDS) and 1,10-phenanthroline (phen) as building blocks is presented. Three crystalline phases were identified and characterized by vibrational and thermal analysis, single crystal and powder X-ray diffraction. The formula of these phases were [Eu(3-OHNDS)(phen)(H2O)2]?3H2O (Phase 1-Eu) (S.G.=triclinic Pī), (C44H34N4O16S4Eu2) (Phase 2-Eu) and [Ln2(3-OHNDS)2(phen)2(H2O)]?3H2O (Phase 3-Ln) where Ln = Tb, Dy, Ho, Er and Yb (S.G.=monoclinic P21/n). Instrumented Indentation studies were performed in order to find the relationship between structural features and mechanical properties (Young?s modulus and hardness) of the crystalline material. An exhaustive characterization of the optical properties was performed, involving excitation-emission experiments and quantification of luminescence. Besides, the sensing of polycyclic aromatic hydrocarbons (PAHs) was tested, resulting in a marked selectivity when the CP interacts with naphthalene molecules. These results make these phases promising materials for the elaboration of chemical colorimetric sensors. Acknowlegment. R. D. Acknowledges Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior for the CAPES/PNPD scholarship from the Brazilian Ministry of Education, to M. Soto-Monsalve and R. de Almeida Santos for measurements and FAPESP (2009/54011-8) for providing Apex-II equipment.References1.D?Vries, R. F.; Iglesias, M.; Snejko, N.; Gutiérrez-Puebla, E.; Monge, M. A. Inorg. Chem. 51, (21), (2012), 11349-11355.2.Gándara, F.; Gutiérrez-Puebla, E.; Iglesias, M.; Snejko, N.; Monge, M. A. Cryst. Growth Des. 10, (1), (2009), 128-134.3.D'Vries, R. F.; Alvarez-Garcia, S.; Snejko, N.; Bausa, L. E.; Gutierrez-Puebla, E.; de Andres, A.; Monge, M. A. J. Mater. Chem. C. 1, (39), (2013), 6316-6324.4.Horike, S.; Umeyama, D.; Kitagawa, S. Acc. Chem. Res. 46, (11), (2013), 2376-2384.