Wei Zeng , Zhihua Mao , Xingyao Wei , Jianzhang Li , Zhou Hong , Shengying Qin
{"title":"冠醚束缚希夫碱过渡金属配合物的合成、二氧亲和性及其仿生催化氧化性能","authors":"Wei Zeng , Zhihua Mao , Xingyao Wei , Jianzhang Li , Zhou Hong , Shengying Qin","doi":"10.1016/j.jsupra.2004.02.001","DOIUrl":null,"url":null,"abstract":"<div><p>Mono-Schiff bases containing crown ether ring (<strong>HL<sup>1</sup></strong>, <strong>HL<sup>2</sup></strong>, <strong>HL<sup>3</sup></strong> and <strong>HL<sup>4</sup></strong>) and their transition-metal complexes were synthesized and characterized by <sup>1</sup><span>H NMR, IR, MS spectra and elemental analysis. The crystal structures of </span><strong>HL<sup>1</sup></strong>, <strong>HL<sup>3</sup></strong> and <strong>CoL<sub>2</sub><sup>1</sup></strong> were determined from X-ray diffraction data. The oxygenation constants (Ko<sub>2</sub>) of Schiff-base Co (II) complexes were measured over a range of −5<!--> <!-->°C to 25<!--> <!-->°C, and the values of ΔH<sup>0</sup> and ΔS<sup>0</sup> were also calculated based on Ko<sub>2</sub><span><span>. In the presence of Mn (III) Schiff base complexes, the biomimetic </span>catalytic oxidation<span> for styrene<span> to benzalhyde was carried out at 100% selectivity. Compared with the uncrowned analogue, the influence of crown ring and its bonding pattern, the distance between the coordination center and crown ring on the dioxygen affinities and biomimetic catalytic oxidation performance of the crowned Schiff base complexes were observed.</span></span></span></p></div>","PeriodicalId":100833,"journal":{"name":"Journal of Supramolecular Chemistry","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2002-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.jsupra.2004.02.001","citationCount":"14","resultStr":"{\"title\":\"Synthesis, Dioxygen Affinities and Biomimetic Catalytic Oxidation Performance of Crown Ether-tethered Schiff Base Transition-Metal Complexes\",\"authors\":\"Wei Zeng , Zhihua Mao , Xingyao Wei , Jianzhang Li , Zhou Hong , Shengying Qin\",\"doi\":\"10.1016/j.jsupra.2004.02.001\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Mono-Schiff bases containing crown ether ring (<strong>HL<sup>1</sup></strong>, <strong>HL<sup>2</sup></strong>, <strong>HL<sup>3</sup></strong> and <strong>HL<sup>4</sup></strong>) and their transition-metal complexes were synthesized and characterized by <sup>1</sup><span>H NMR, IR, MS spectra and elemental analysis. The crystal structures of </span><strong>HL<sup>1</sup></strong>, <strong>HL<sup>3</sup></strong> and <strong>CoL<sub>2</sub><sup>1</sup></strong> were determined from X-ray diffraction data. The oxygenation constants (Ko<sub>2</sub>) of Schiff-base Co (II) complexes were measured over a range of −5<!--> <!-->°C to 25<!--> <!-->°C, and the values of ΔH<sup>0</sup> and ΔS<sup>0</sup> were also calculated based on Ko<sub>2</sub><span><span>. In the presence of Mn (III) Schiff base complexes, the biomimetic </span>catalytic oxidation<span> for styrene<span> to benzalhyde was carried out at 100% selectivity. Compared with the uncrowned analogue, the influence of crown ring and its bonding pattern, the distance between the coordination center and crown ring on the dioxygen affinities and biomimetic catalytic oxidation performance of the crowned Schiff base complexes were observed.</span></span></span></p></div>\",\"PeriodicalId\":100833,\"journal\":{\"name\":\"Journal of Supramolecular Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2002-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.jsupra.2004.02.001\",\"citationCount\":\"14\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Supramolecular Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1472786204000024\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Supramolecular Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1472786204000024","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Synthesis, Dioxygen Affinities and Biomimetic Catalytic Oxidation Performance of Crown Ether-tethered Schiff Base Transition-Metal Complexes
Mono-Schiff bases containing crown ether ring (HL1, HL2, HL3 and HL4) and their transition-metal complexes were synthesized and characterized by 1H NMR, IR, MS spectra and elemental analysis. The crystal structures of HL1, HL3 and CoL21 were determined from X-ray diffraction data. The oxygenation constants (Ko2) of Schiff-base Co (II) complexes were measured over a range of −5 °C to 25 °C, and the values of ΔH0 and ΔS0 were also calculated based on Ko2. In the presence of Mn (III) Schiff base complexes, the biomimetic catalytic oxidation for styrene to benzalhyde was carried out at 100% selectivity. Compared with the uncrowned analogue, the influence of crown ring and its bonding pattern, the distance between the coordination center and crown ring on the dioxygen affinities and biomimetic catalytic oxidation performance of the crowned Schiff base complexes were observed.
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