{"id":3670,"date":"2011-03-09T13:54:28","date_gmt":"2011-03-09T13:54:28","guid":{"rendered":"http:\/\/www.ch.imperial.ac.uk\/rzepa\/blog\/?p=3670"},"modified":"2011-03-09T13:54:28","modified_gmt":"2011-03-09T13:54:28","slug":"from-the-colour-blue-to-molecular-wires","status":"publish","type":"post","link":"https:\/\/www.rzepa.net\/blog\/?p=3670","title":{"rendered":"From the colour blue to molecular wires"},"content":{"rendered":"
\n

In the previous post<\/a> I pondered the colour of Monastral blue (copper phthalocyanine). Something did not quite fit, and so I speculated that perhaps some oxidation of the pigment might give a new species. This species (Cambridge code FEGJOQ<\/a>) comprises two parts of copper phthalocyanine, 1 part of the corresponding cation, and 1 part of triodide anion. Looking at the packing of this system, I spotted something I had seen<\/a> some time ago in NaI2<\/sub>.Acetone, namely an infinitely long and absolutely straight chain of iodine atoms, a molecular wire if you like.<\/p>\n

\"\"<\/a>

An iodine molecular wire.<\/p><\/div>\n

A different view shows how this wire runs down layers of the phthalocyanine. The iodines are 3.2\u00c5 apart, compared to the sum of their van der Waals radii of ~4.0\u00c5.<\/p>\n

\"\"

FEGJOQ, seen edge on. Click for 3D<\/p><\/div>Four phthalocyanines stack to form a cavity for the iodine wire to run down, and the size of that cavity is perfectly filled by the iodine! One might speculate if a smaller halogen, with lots more space to rattle around it, might not form this structure!<\/p>\n

 <\/p>\n

\"\"

End on view, showing the filling of the channel by iodines. Click for 3D<\/p><\/div>\n\n<\/div> ","protected":false},"excerpt":{"rendered":"

In the previous post I pondered the colour of Monastral blue (copper phthalocyanine). Something did not quite fit, and so I speculated that perhaps some oxidation of the pigment might give a new species. This species (Cambridge code FEGJOQ) comprises two parts of copper phthalocyanine, 1 part of the corresponding cation, and 1 part of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6],"tags":[59,456,459],"class_list":["post-3670","post","type-post","status-publish","format-standard","hentry","category-interesting-chemistry","tag-cambridge","tag-molecular-wire","tag-phthalocyanine"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p1gPyz-Xc","jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3670","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3670"}],"version-history":[{"count":0,"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3670\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3670"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3670"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rzepa.net\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3670"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}