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oai:riuma.uma.es:10630/120632026-02-03T11:59:17Zcom_10630_2254col_10630_37959

00925njm 22002777a 4500 dc Pérez-Colodrero, Rosario Mercedes author Salcedo, Inés R. author Bazaga-García, Montse author Olivera-Pastor, Pascual author Moreno-Real, Laureano author Losilla, Enrique R. author Cabeza-Díaz, Aurelio author 2016-09-22 Crystalline metal phosphonates are referred to as a type of structurally versatile coordination polymers [1]. Many of them contain guest molecules (H2O, heterocyclics, etc.), acidic sites and, furthermore, their structure can be also amenable for post‐synthesis modifications in order to enhance desired properties [2]. In the present work, we examine the relationships between crystal structure and proton conductivity for several metal phosphonates derive from multifunctional ligands, such as 5-(dihydroxyphosphoryl)isophthalic acid (PiPhtA) [3] and 2-hydroxyphosphonoacetic acid (H3HPAA). Crystalline divalent metal derivatives show a great structural diversity, from 1D to 3D open-frameworks, possessing hydrogen-bonded water molecules and acid groups. These solids present a proton conductivity range between 7.2·10-6 and 1.3·10−3 S·cm-1. Upon exposure to ammonia vapor, from an aqueous solution, solid state transformations are observed accompanied of enhance proton conductivities. The stability of these solids under different environment conditions (temperature and relative humidities) as well as the influence of the ammonia adsorption on the proton conduction properties of the resulting solids will be discussed. http://hdl.handle.net/10630/12063 Polímeros Ammonia effects on proton conductivity properties of coordination polymers