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Rapid Commun."],"published-print":{"date-parts":[[2017,1]]},"abstract":"<jats:p>Humidity detection, and the quest for low\u2010cost facile humidity\u2010sensitive indicator materials is of great interest for many fields, including semi\u2010conductor processing, food transport and storage, and pharmaceuticals. Ideal humidity\u2010detection materials for a these applications might be based on simple clear optical readout with no power supply, i.e.: a clear color change observed by the naked eye of any untrained observer, since it doesn't require any extra instrumentation or interpretation. Here, the introduction of a synthesis\u2010free one\u2010step procedure, based on physical mixing of easily available commercial materials, for producing a humidity memory material which can be easily painted onto a wide variety of surfaces and undergoes a remarkable color change (approximately 100 nm blue\u2010shift of \u03bb<jats:sub>MAX<\/jats:sub>) upon exposure to various thresholds of levels of ambient humidity is reported. This strong color change, easily visible to as a red\u2010to\u2010orange color switch, is locked in until inspection, but can then be restored reversibly if desired, after moderate heating. By taking advantage of spontaneously\u2010forming reversible \u2018soft\u2019 supramolecular bonds between a red\u2010colored azo dye and a host polymer matrix, a reversible dye \u2018migration\u2019 aggregation appearing orange, and dis\u2010aggregation back to red can be achieved, to function as the sensor.\n<jats:boxed-text content-type=\"graphic\" position=\"anchor\"><jats:graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mimetype=\"image\/png\" position=\"anchor\" specific-use=\"enlarged-web-image\" xlink:href=\"graphic\/marc201600582-abs-0001-m.png\"><jats:alt-text>image<\/jats:alt-text><\/jats:graphic><\/jats:boxed-text><\/jats:p>","DOI":"10.1002\/marc.201600582","type":"journal-article","created":{"date-parts":[[2016,11,23]],"date-time":"2016-11-23T10:22:50Z","timestamp":1479896570000},"source":"Crossref","is-referenced-by-count":20,"title":["The Orange Side of Disperse Red 1: Humidity\u2010Driven Color Switching in Supramolecular Azo\u2010Polymer Materials Based on Reversible Dye Aggregation"],"prefix":"10.1002","volume":"38","author":[{"given":"Simon","family":"Schoelch","sequence":"first","affiliation":[{"name":"Department of Chemistry McGill University  801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada"},{"name":"Institute for Macromolecular Chemistry University of Freiburg  Stefan\u2010Meier\u2010Str. 31 79104 Freiburg Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jaana","family":"Vapaavuori","sequence":"additional","affiliation":[{"name":"Department of Chemistry McGill University  801 Sherbrooke Street West Montreal Quebec H3A 0B8 Canada"},{"name":"Department of Chemistry and Bioengineering Tampere University of Technology  FI\u201033101 Tampere Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fr\u00e9d\u00e9ric\u2010Guillaume","family":"Rollet","sequence":"additional","affiliation":[{"name":"Department of Chemistry McGill University  801 Sherbrooke Street West Montreal Quebec H3A 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