Adjustable Colorimetric Moisture Indicators
Assignee3M Innovative Properties Company
InventorsMyungchan Kang, Evan Koon Lun Yuuji Hajime
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Abstract
Compositions are provided comprising: 1) a solid metal oxide support having surface hydroxyl groups; 2) a silyl-containing compound bound to the solid metal oxide support through a silanol bond with the surface hydroxyl groups; and 3) a bis(glyoxime)-transition metal complex bound to the solid metal oxide support. These compositions can be used to make a colorimetric relative humidity-indicating sensor. A method of adjusting the colorimetric response of a moisture-indicating composition and a method of detecting moisture are also provided.
Claims25
A composition comprising:
- a solid metal oxide support having surface hydroxyl groups;
- a silyl-containing compound bound to the solid metal oxide support through a silanol bond with the surface hydroxyl groups;
- and
- a bis(glyoxime)-transition metal complex bound to the solid metal oxide support;
- wherein the composition is a reversible colorimetric moisture-indicating composition.
A colorimetric relative humidity-indicating sensor comprising:
- a reversible colorimetric moisture-indicating composition comprising
- a solid metal oxide support having surface hydroxyl groups;
- a silyl-containing compound bound to the solid metal oxide support through a silanol bond with the surface hydroxyl groups;
- and
- a bis(glyoxime)-transition metal complex bound to the solid metal oxide support;
- and
- wherein the optical spectrum of the sensor changes quantitatively according to the relative humidity within the environment within which the sensor is placed.
A method of adjusting the colorimetric response of a moisture-indicating composition comprising:
- modifying the surface of a solid metal oxide support having surface hydroxyl groups by reacting the surface hydroxyl groups of the solid metal oxide support with a silyl-containing compound to create a modified solid metal oxide support;
- and
- bonding a bis(glyoxime)-transition metal complex to the modified solid metal oxide support to create a reversible colorimetric moisture-indicating composition.
Dependencies are inferred from the claim text.