Studies on the synthesis and properties of open-chain and macrocyclic crown compounds |
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| Authors: | Jiumin Si Yangjie Wu Lei Cai Yizhen Liu Baoshi Du Tongsheng Xu Haoyun An |
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| Institution: | (1) Department of Chemistry, Zhengzhou University, Zhengzhou, Henan, PRC;(2) Department of Pharmacology, Henan Medical University, Zhengzhou, Henan, PRC;(3) Department of Chemistry, Brigham Young University, 84602 Provo, UT, USA |
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| Abstract: | Eight new open-chain crown compounds (1–8) and two new macrocyclic crown ethers (9 and10) were synthesized from 1,5-bis(2-aminophenoxy)-3-oxapentane (15) and 1,8-bis(2-aminophenoxy)-3,6-dioxaoctane (16) which were prepared by the catalytic hydrogenation of the corresponding bis(2-nitrophenoxy) derivatives13 and14. The fluorescent property investigation of two open-chain crown ethers (7 and8) indicated that they exhibit complexing effects on Ag+ and Mn2+ cations and can be used as fluorescent reagents for the microanalysis of the metal cations. The pyrolysis kinetics measurement for compounds5 and6 in nitrogen and air was carried out, and their reaction orders and activation energy were obtained. They are one-step and two-step pyrolysis reactions in nitrogen and air, respectively. |
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| Keywords: | Open-chain crown compounds macrocyclic crown ethers fluorescent properties pyrolysis kinetics |
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