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Volume 3, Issue 2
ISSN: 2470-9905
Crystallography 2017
October 16-17, 2017
2
nd
International Conference on
October 16-17, 2017 | Chicago, USA
Applied Crystallography
Unusual molecular movements in the solid state
Vittal Jagadese J
National University of Singapore, Singapore
C
rystallization is a kinetic process and the experimental conditions like solvents, concentration, pH, temperature and time have
greater control on the nature of products in the synthesis of coordination network structures. During crystallization, the ligands
bind to the metal ions reversibly and hence, the least soluble polymer will crystallize first, independent of the metal-ligand ratio used
in the crystallization. In the kinetic products, quite often the solvents are bonded to the metal ions. The removal of these coordinated
solvents is likely to transform the kinetically formed coordination polymers (CPs) into thermodynamically stable products. Such
structural transformations have been demonstrated in many coordination polymeric network structures, if the solid state structure
of the products can be determined unequivocally. If the structural transformation to thermodynamic product is accompanied by the
parallel alignment of double bonds, then the photochemical reactivity could be tested through the formation of cyclobutane rings
from [2+2] cycloaddition reactions. Such techniques have been successfully used to predict the structural transformation of linear
CPs to photoreactive ladder structures due to desolvation. In his laboratory the speaker has encountered a number of such molecular
movements in the solid state which will be highlighted in this talk.
chmjjv@nus.edu.sgStruct Chem Crystallogr Commun, 3:2
DOI: 10.21767/2470-9905-C1-003