2026-05-28T07:59:28Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/210392026-02-03T11:13:40Zcom_10630_2254col_10630_37953
RIUMA. Repositorio Institucional de la Universidad de Málaga
author
Pérez-Colodrero, Rosario Mercedes
author
Olivera-Pastor, Pascual
author
Losilla, Enrique R.
author
García-Aranda, Miguel Ángel
author
León-Reina, Laura
author
Papadaki, M.
author
McKinlay, Alistair C.
author
Morris, Russell E.
author
Demadis, Konstantinos D.
author
Cabeza-Díaz, Aurelio
2021-03-08T08:34:10Z
2021-03-08T08:34:10Z
2012
Dalton Trans., 2012, 41, 4045–4051
https://hdl.handle.net/10630/21039
10.1039/c2dt11992g
A new flexible ultramicroporous solid, La(H5DTMP)·7H2O (1), has been crystallized at room temperature using the tetraphosphonic acid H8DTMP, hexamethylenediamine-N,N,N′,N′-tetrakis(methylenephosphonic acid). Its crystal structure, solved by synchrotron powder X-ray diffraction, is characterised by a 3D pillared open-framework containing 1D channels filled with water. Upon dehydration, a new related crystalline phase, La(H5DTMP) (2) is formed. Partial rehydration of 2 led to La(H5DTMP)·2H2O (3). These new phases contain highly corrugated layers showing different degrees of conformational flexibility
of the long organic chain. The combination of the structural study and the gas adsorption characterization (N2 and CO2) suggests an ultramicroporous flexible framework. NO isotherms are indicative of a strong irreversible adsorption of NO within the pores. Impedance data indicates that 1 is a proton-conductor with a conductivity of 8 × 10−3 S cm−1 at 297 K and 98% of relative humidity, and an activation energy of 0.25 eV.
eng
Química inorgánica
Multifunctional lanthanum tetraphosphonates: Flexible, ultramicroporous and proton-conducting hybrid frameworks
journal article
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1472435
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2012_DT_LaHDTMP_Colodrero.pdf