{"title":"含咔唑/三苯胺供体片段的双环金属化铱（III）配合物用于氧传感","authors":"Hongcui Yu, Bo Yu, Yajiao Song, Jiawei Li","doi":"10.1007/s11243-024-00582-x","DOIUrl":null,"url":null,"abstract":"<p>Bis-cyclometalated Ir(III) complexes Ir(ppy-Carbazole)<sub>2</sub>(acac) and Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) (acac = acetylacetonate) based on the 2-phenylpyridine (ppy) with carbazole or triphenylamine moieties were prepared, characterized and tested as phosphorescent materials. The photophysical properties of the two complexes were investigated by comparing them with the unsubstituted parent Ir(III) complex Ir(ppy)<sub>2</sub>(acac). Complexes Ir(ppy-Carbazole)<sub>2</sub>(acac) and Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) with carbazole/triphenylamine-appended C^N cyclometalating ligands exhibit larger molar extinction coefficients and longer luminescence lifetimes compared to the unsubstituted parent Ir(ppy)<sub>2</sub>(acac). Based on a rational design strategy by combining a ppy unit and electron-donating carbazole or triphenylamine segment, we investigated the merits of the carbazole or triphenylamine group substituted cyclometalated Ir(III) complexes for oxygen sensing. These probes demonstrate optimal luminescence dynamics for oxygen monitoring in the range of 0–100% oxygen levels when immobilized in an ethyl cellulose matrix. Importantly, the complex Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) exhibits a longer luminescence lifetime (<i>τ</i> = 3.60 μs) and a higher oxygen sensitivity (<i>I</i><sub>0</sub>/<i>I</i><sub>100</sub> = 15.0, <i>K</i><sub>SV</sub> = 0.02582 Torr<sup>−1</sup>) compared with the other complexes.</p>","PeriodicalId":803,"journal":{"name":"Transition Metal Chemistry","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Bis-cyclometalated Ir(III) complexes with carbazole/triphenylamine donor fragment for oxygen sensing\",\"authors\":\"Hongcui Yu, Bo Yu, Yajiao Song, Jiawei Li\",\"doi\":\"10.1007/s11243-024-00582-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Bis-cyclometalated Ir(III) complexes Ir(ppy-Carbazole)<sub>2</sub>(acac) and Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) (acac = acetylacetonate) based on the 2-phenylpyridine (ppy) with carbazole or triphenylamine moieties were prepared, characterized and tested as phosphorescent materials. The photophysical properties of the two complexes were investigated by comparing them with the unsubstituted parent Ir(III) complex Ir(ppy)<sub>2</sub>(acac). Complexes Ir(ppy-Carbazole)<sub>2</sub>(acac) and Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) with carbazole/triphenylamine-appended C^N cyclometalating ligands exhibit larger molar extinction coefficients and longer luminescence lifetimes compared to the unsubstituted parent Ir(ppy)<sub>2</sub>(acac). Based on a rational design strategy by combining a ppy unit and electron-donating carbazole or triphenylamine segment, we investigated the merits of the carbazole or triphenylamine group substituted cyclometalated Ir(III) complexes for oxygen sensing. These probes demonstrate optimal luminescence dynamics for oxygen monitoring in the range of 0–100% oxygen levels when immobilized in an ethyl cellulose matrix. Importantly, the complex Ir(ppy-NPh<sub>3</sub>)<sub>2</sub>(acac) exhibits a longer luminescence lifetime (<i>τ</i> = 3.60 μs) and a higher oxygen sensitivity (<i>I</i><sub>0</sub>/<i>I</i><sub>100</sub> = 15.0, <i>K</i><sub>SV</sub> = 0.02582 Torr<sup>−1</sup>) compared with the other complexes.</p>\",\"PeriodicalId\":803,\"journal\":{\"name\":\"Transition Metal Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2024-04-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transition Metal Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1007/s11243-024-00582-x\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transition Metal Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1007/s11243-024-00582-x","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Bis-cyclometalated Ir(III) complexes with carbazole/triphenylamine donor fragment for oxygen sensing
Bis-cyclometalated Ir(III) complexes Ir(ppy-Carbazole)2(acac) and Ir(ppy-NPh3)2(acac) (acac = acetylacetonate) based on the 2-phenylpyridine (ppy) with carbazole or triphenylamine moieties were prepared, characterized and tested as phosphorescent materials. The photophysical properties of the two complexes were investigated by comparing them with the unsubstituted parent Ir(III) complex Ir(ppy)2(acac). Complexes Ir(ppy-Carbazole)2(acac) and Ir(ppy-NPh3)2(acac) with carbazole/triphenylamine-appended C^N cyclometalating ligands exhibit larger molar extinction coefficients and longer luminescence lifetimes compared to the unsubstituted parent Ir(ppy)2(acac). Based on a rational design strategy by combining a ppy unit and electron-donating carbazole or triphenylamine segment, we investigated the merits of the carbazole or triphenylamine group substituted cyclometalated Ir(III) complexes for oxygen sensing. These probes demonstrate optimal luminescence dynamics for oxygen monitoring in the range of 0–100% oxygen levels when immobilized in an ethyl cellulose matrix. Importantly, the complex Ir(ppy-NPh3)2(acac) exhibits a longer luminescence lifetime (τ = 3.60 μs) and a higher oxygen sensitivity (I0/I100 = 15.0, KSV = 0.02582 Torr−1) compared with the other complexes.
期刊介绍：
Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc.
Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.
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