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Please use this identifier to cite or link to this item: https://dspace.ffh.bg.ac.rs/handle/123456789/1874
Title: Thermally activated 3D to 2D structural transformation of [Ni<inf>2</inf>(en)<inf>2</inf>(H<inf>2</inf>O)<inf>6</inf>(pyr)]·4H<inf>2</inf>O flexible coordination polymer
Authors: Begović, Nebojša N.
Blagojević, Vladimir A.
Ostojić, Sanja B.
Radulović, Aleksandra M.
Poleti, Dejan
Minić, Dragica 
Keywords: Crystal structure;Differential scanning calorimetry (DSC);Organometallic compounds;Polymers
Issue Date: 1-Jan-2015
Journal: Materials Chemistry and Physics
Abstract: 
Thermally activated 3D to 2D structural transformation of the binuclear [Ni2(en)2(H2O)6(pyr)]·4H2O complex was investigated using a combination of theoretical and experimental methods. Step-wise thermal degradation (dehydration followed by release of ethylene diamine) results in two layered flexible coordination polymer structures. Dehydration process around 365 K results in a conjugated 2D structure with weak interlayer connectivity. It was shown to be a reversible 3D to 2D framework transformation by a guest molecule, and rehydration of the dehydration product occurs at room temperature in saturated water vapor. Rehydrated complex exhibits lower dehydration temperature, due to decreased average crystalline size, with higher surface area resulting in easier release and diffusion of water during dehydration. Thermal degradation of dehydration around 570 K, results in loss of ethylene diamine, producing a related 2D layered polymer structure, without interconnectivity between individual polymer layers.
URI: https://dspace.ffh.bg.ac.rs/handle/123456789/1874
ISSN: 0254-0584
DOI: 10.1016/j.matchemphys.2014.09.052
Appears in Collections:Journal Article

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University of Belgrade
Faculty of Physical Chemistry
Studentski trg 12-16
11158 Belgrade 118
PAC 105305
SERBIA
University of Belgrade Faculty of Physical Chemistry