{"id":11876,"date":"2022-12-30T07:41:31","date_gmt":"2022-12-29T23:41:31","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=11876"},"modified":"2022-12-30T07:41:31","modified_gmt":"2022-12-29T23:41:31","slug":"su-ning-et-al-published-their-research-in-journal-of-organometallic-chemistry-in-2018-cas-19959-77-4","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=11876","title":{"rendered":"Su, Ning et al. published their research in Journal of Organometallic Chemistry in 2018 | CAS: 19959-77-4"},"content":{"rendered":"<p>Photoluminescence and electroluminescence of four orange-red and red organic iridium(III) complexes was written by Su, Ning;Zheng, You-Xuan. And the article was included in Journal of Organometallic Chemistry in 2018.<a href=\"https:\/\/www.ambeed.com\/products\/19959-77-4.html\">SDS of cas: 19959-77-4<\/a> This article mentions the following:<\/p>\n<p>Using 1-(4-(trifluoromethyl)phenyl)isoquinoline (tfmpiq) and 4-(4-(trifluoromethyl)phenyl) quinazoline (tfmpqz) as the main ligands and pyrazole pyridine derivatives (mepzpy: 2-(3-methyl-1H-pyrazol-5-yl)pyridine, cf3pzpy: 2-(3-(trifluoromethyl)-1H-pyrazol-5-yl)pyridine) as the ancillary ligands, four iridium(III) complexes (PIQ-Ir1-me, PIQ-Ir2-cf3, PQZ-Ir3-me and PQZ-Ir4-cf3) were synthesized and investigated. Due to the variation of the ligands, these Ir(III) complexes showed different emissions peaking from 602 to 628 nm with the phosphorescence quantum yields of 0.40-0.67. Moreover, applying these Ir(III) complexes as emitters, the organic light-emitting diodes (OLEDs) with the configuration of ITO\/HATCN (hexaazatriphenylenehexacabonitrile, 5 nm)\/TAPC (bis[4-(N,N-ditolylamino)-phenyl] cyclohexane, 50 nm)\/Ir(III) complexes (8 wt%): TCTA (4,4&#8242;,4&#8221;-tri(9-carbazoyl)triphenylamine, 20 nm)\/TmPyPB (1,3,5-tri[(3-pyridyl)-phen-3-yl]benzene, 40 nm)\/LiF (1 nm)\/Al (100 nm) exhibited good performances. Especially, the device with orange-red PQZ-Ir4-cf3 emitter obtained the best device performances with the maximum current efficiency of 40.04 cd A<sup>-1<\/sup> and the maximum power efficiency of 33.98 lm W<sup>-1<\/sup>. For the pure red complex PQZ-Ir4-me with CIE coordinates at (0.64, 0.34) showed the maximum external quantum efficiency of 22.3%. In the experiment, the researchers used many compounds, for example, 2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4<a href=\"https:\/\/www.ambeed.com\/products\/19959-77-4.html\">SDS of cas: 19959-77-4<\/a>).<\/p>\n<p>2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4) belongs to pyrazole derivatives. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugated acid 2.49 at 25 \u00b0C).Pyrazole used as a ligand to prepare organometallic compounds. The presence of both electronegative nitrogen atoms in the pyrazole ring reduces the electron density of the C3- and C5-positions leaving electron density of C4-position unaltered. Thus the C4-position is vulnerable to electrophilic attack. The C3 electrophilic-position may undergo deprotonation in the presence of a strong base leading to ring opening.<a href=\"https:\/\/www.ambeed.com\/products\/19959-77-4.html\">SDS of cas: 19959-77-4<\/a><\/p>\n<p>Referemce:<br \/><a href=\"https:\/\/en.wikipedia.org\/wiki\/Pyrazole\">Pyrazole &#8211; Wikipedia<\/a>,<br \/><a href=\"https:\/\/www.sciencedirect.com\/topics\/chemistry\/pyrazoles\">Pyrazoles &#8211; an overview | ScienceDirect Topics<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2-(5-Methyl-1H-pyrazol-3-yl)pyridine (cas: 19959-77-4) belongs to pyrazole derivatives. Pyrazole is a weak base, with pKb 11.5 (pKa of the conjugated acid 2.49 at 25 \u00b0C).Pyrazole used as a ligand to prepare organometallic compounds. The presence of both electronegative nitrogen atoms in the pyrazole ring reduces the electron density of the C3- and C5-positions leaving electron density of C4-position unaltered. Thus the C4-position is vulnerable to electrophilic attack. The C3 electrophilic-position may undergo deprotonation in the presence of a strong base leading to ring opening.<a href=\"https:\/\/www.ambeed.com\/products\/19959-77-4.html\">SDS of cas: 19959-77-4<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[131],"tags":[128],"class_list":["post-11876","post","type-post","status-publish","format-standard","hentry","category-pyrazoles-derivatives","tag-100-200"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Su, Ning et al. published their research in Journal of Organometallic Chemistry in 2018 | CAS: 19959-77-4 | pyrazoles-derivatives<\/title>\n<meta name=\"description\" content=\"Photoluminescence and electroluminescence of four orange-red and red organic iridium(III) complexes was written by Su, Ning;Zheng, You-Xuan. 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