Abstracts Book - IMRC 2018

• SD6-P014
SURFACE CRYSTALLOGRAPHY: IMPACT ON CONVERSION AND
ENERGY STORAGE
Lucero Torres Lopez 1 , Manuel Avila Santos 1 , Rene Salvador Lopez Cabrera 1
1 Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Legaría, IPN,
Nanotecnologia y Materiales Funcionales, Mexico.
The most of nanoporous materials reported to date have been found to exhibit little
structural changes during guest exchange. In recent years, however, a number of
interesting compounds known as flexible framework nanoporous materials have
been discovered, which show reversible structural transitions between low porosity
and high porosity phases during the adsorption and desorption of guests. The
functional properties of these materials are closely related to their crystal structure
and, particularly, to the structural transitions induced by thermal energy and
pressure. Nevertheless, until now there are very few published investigations
dedicated to determining this behavior. So, in this project, the possible structural
transitions for a series of flexible framework nanoporous materials as consequence
of gas pressure in the porous framework and changes in the temperature will be
studied. The structural study will be carried out using Calorimetric and Raman data
to identify the possible temperature induced structural transitions. For those
samples that present thermal structural transitions, high resolution XRD data will
be collected in order to resolve and refine their crystal structures. The pressure
effect on the porous framework will be explored using N2 and H2 adsorption
isotherms. For those solids with step-like adsorption curves, high resolution XRD
data with adsorbed species using a capillary cell at gas pressure will be recorded
and then used to solve the crystal structure of the new phases. The structural study
will be complemented with the information of techniques such as IR Spectroscopy
and Elemental Chemical Analyses. The structural information to be obtained and its
correlation with the materials adsorption, thermal and spectroscopic properties for
the considered series of materials have no precedent in the available scientific
literature. Such information is relevant for the potential applications of these
porous solids, such as gases storage, smart membranes and others.
Acknowledgment: Laboratorio Nacional de Conversión y Almacenamiento de
Energía (LNCAE) Consejo Nacional De Ciencia y Tecnología (CONACyT)
Keywords: Crystal structure, Gas adsorption sites, Single crystal
Presenting authors email: lucerolu7@gmail.com