z-logo
Premium
Colorimetric Solvent Indicators Based on Nafion Membranes Incorporating Nickel(II)‐Chelate Complexes
Author(s) -
Hosokawa Hitoshi,
Funasako Yusuke,
Mochida Tomoyuki
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403996
Subject(s) - solvent , acetylacetone , cationic polymerization , thermochromism , nickel , chemistry , membrane , octahedron , chelation , nafion , molecule , inorganic chemistry , polymer chemistry , crystallography , organic chemistry , electrochemistry , crystal structure , biochemistry , electrode
To develop solvent‐recognition films, Nafion membranes incorporating cationic nickel‐chelate complexes, that is, [Ni(L 1 )(L 2 )] + (HL 1 =acetylacetone, 2,2,6,6‐tetramethyl‐3,5‐heptanedione; L 2 = N , N ‐diethylethylenediamine, N ‐butyl‐ N , N ′, N ′‐trimethylethylenediamine), were prepared. Immersion of the films in various solvents effected the color changes varying from red to pale blue green depending on the donor number of the solvents. The color change is based on an equilibrium shift between square‐planar and solvent‐coordinated octahedral geometries of the cations. The degree of the color change depended on the affinity of the incorporated complex to the solvent molecules. The films were robust and exhibited a reversible solvent response. The films exhibited thermochromism when a small amount of appropriate solvents were incorporated and changed from pale blue green at low temperatures to red at high temperatures.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here