{"id":9330,"date":"2016-07-15T06:41:59","date_gmt":"2016-07-15T06:41:59","guid":{"rendered":"http:\/\/revoscience.com\/en\/?p=9330"},"modified":"2016-07-15T06:41:59","modified_gmt":"2016-07-15T06:41:59","slug":"changing-colours-of-light","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/changing-colours-of-light\/","title":{"rendered":"Changing colours of light"},"content":{"rendered":"

Scientists at Hokkaido University have developed a series of luminescent compounds that change emission colours upon mechanical stimuli.<\/strong><\/em><\/p>\n

\n

\"48<\/a>
48 organic compounds containing gold atoms, or gold(I) isocyanide complexes. 28 of the compounds were found to be mechanochromic, emitting changing colours. Compounds before and after mechanical stimulation are shown on the left and right in each panel, respectively.
Source : Seki T., Takamatsu Y., Ito H., Journal of the American Chemical Society<\/figcaption><\/figure>\n

In a phenomenon known as mechanochromism, certain solid and liquid crystalline materials change their photoluminescence properties upon mechanical stimulation, such as grinding, ball-milling and crushing. Although such compounds have attracted much attention with hopes of various applications, it has heretofore been thought difficult to synthesize mechanochromic compounds with desired emission properties and behaviours as each molecule emits different colours.<\/span>

<\/p>\n

\"Changes<\/a>
Changes in colors emitted through mechanochromism a) When the blue crystal in emission was ground at the centre, the colour turned yellow. b) A round filter paper thinly coated with blue mechanochromic molecules in emission. The yellowish letters \u201cAu\u201d appeared after scratching the surface with a spatula.<\/figcaption><\/figure>\n

A team of scientists at Hokkaido University in Japan synthesized 48 organic compounds containing gold atoms, or gold(I) isocyanide complexes\u201428 of which were found to be mechanochromic, emitting changing colours such as blue, green, yellow and orange upon stimulation.\u00a0<\/span>

With the aim of unraveling the mechanism behind the colour changes, the researchers conducted detailed analyses of the crystal structures of almost all the molecules in the studied compounds. They found various formations of molecular arrangements, which, they concluded, is key to understanding the changes in their photoluminescence properties.<\/span>

Their findings could be applied to develop a sensor for detecting minute forces that occur in a several-nanometre segment in the cells\u2014currently regarded as a difficult task. \u201cIf such a sensor is developed, it will contribute to identifying the mechanism for cellular movements and such,\u201d said the research paper\u2019s co-author Hajime Ito.\u00a0<\/span>

The research results were published in May in the Journal of the American Chemical Society and included in \u201cJACS Spotlights.\u201d The article was also selected as part of the \u201cACS Editors\u2019 Choice\u201d program.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Scientists at Hokkaido University have developed a series of luminescent compounds that change emission colours upon mechanical stimuli.<\/p>\n","protected":false},"author":6,"featured_media":9333,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-9330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735-150x117.jpg",150,117,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",95,37,false],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",300,117,false],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",96,37,false],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2016\/07\/3735.jpg",150,59,false]},"author_info":{"info":["Amrita Tuladhar"]},"category_info":"Research<\/a>","tag_info":"Research","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/9330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=9330"}],"version-history":[{"count":0,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/9330\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/9333"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=9330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=9330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=9330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}