Proton conductivity of lanthanide nitrilotris-methylphosphonates

S24: Metal-Organic (MOFs) and Covalent Organic Frameworks (COFs) PP-324: PROTON CONDUCTIVITY OF LANTHANIDE NITRILOTRISMETHYLPHOSPHONATES I. R. Salcedo1, M. Bazaga-García1, R. M.P. Colodrero1, P. Olivera-Pastor1, E. R. Losilla1, A. Cabeza1. 1 Departamento de Química Inorgánica, Universidad de Málaga, Campus Teatinos s/n 29071-Málaga, Spain, [email protected] Palabras Clave: coordination polymers, metal phosphonates, proton conductivity, solidstate chemistry, crystal structure. Multifunctional metal phosphonates are acidic coordination polymers (CPs) with remarkable stability and proton conducting properties owing to their structure is usually composed of extended hydrogen-bond networks that favor proton transfer pathways [1]. In this communication, three different families of proton conductors based on lanthanide nitrilotris-methylphosphonates are examined. Compounds were isolated by crystallization at room temperature at pH <0.8 in the presence of. When chloride is presented in solution two families of compounds were isolated, depending on the concentration of chloride in solution: free-chloride 1D solids with formula Ln2(H3NMP)2(H2O)4]·4.5H2O [Ln= La3+] [2] or layered chloride-containing Ln(H4NMP)(H2O)2]Cl·2H2O [Ln= La3+ - Ho3+] materials [3]. In absence of chloride, a third series of compounds was obtained. This structural versatility leads to a wide range of proton conductivity varying between 3 × 10−4 S·cm−1 and 2 × 10−3 S·cm−1 as measured at 80 °C and 95% RH. Referencias [1] A. Clearfield, K. D. Demadis. Metal phosphonate Chemistry: from synthesis to applications. 1st Edition, RSC-Publishing, Cambridge, 2012. [2] R. F. Mendes, P. Silva, M. M. Antunes, A. A. Valente, F. A. Almeida Paz. Chemical Communication. 2015, 51, 10807-10810. [3] M. Bazaga-García, G. K. Angeli, K. E. Papathanasiou, I. R. Salcedo, P. Olivera-Pastor, E. R. Losilla, D. Choquesillo-Lazarte, Gary B. Hix, A. Cabeza, K. Demadis. Inorganic Chemistry. 2016, 55, 7414-7424.