Method and device for indicating moisture based on bis(glyoxime)-transition metal complexes
Assignee3M Innovative Properties Company
InventorsEvan Koon Lun Yuuji Hajime, Myungchan Kang
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Abstract
Compositions that include bis(glyoxime)-transition metal complexes bound to metal oxide solid supports are provided. In some embodiments the compositions include nickel dimethylglyoxime and the metal oxide supports can be alumina or silica. These compositions can be used to make a colorimetric moisture-indicating sensor that changes visible reflection spectrum quantitatively and reversibly according to the amount of moisture in contact with the sensor. Also provided is a method of detecting moisture using the provided compositions.
Claims5
A method of detecting moisture comprising:
- providing a composition, the composition comprising:
- a solid metal oxide support;
- and
- a bis(glyoxime)-transition metal complex bound to the support, wherein the visible spectroscopic reflection color intensity change of the composition is quantitative and reversible according to the amount of moisture in contact with the composition;
- and
- exposing the composition to a moist atmosphere.
A method of detecting moisture according to claim 16, further comprising measuring the visible spectroscopic reflection spectrum of the composition after exposing the composition to a humid atmosphere.
Dependencies are inferred from the claim text.