私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

相關鏈接
聯系方式
  • 通信地址:中國江蘇省蘇州市工業園區仁愛路199號蘇州大學909-3313
  • 郵編:215123
  • 電話:86-0512-65880045
  • 傳真:
  • Email:
當前位置:> 首頁 > 論文著作 > 正文
One-Step Synthesis of a Thienylenepyridazinylenethienylene-based Coil-Rod-Coil Copolymer with Enhanced Emission and Improved Fluorescence Stability
作者:Wei Wu, Haibo Xu, Dezhi Shen, Tian Qiu, Li-Juan Fan*
關鍵字:aggregation,block copolymers,conjugated polymers,fluorescence,oligomers
論文來源:期刊
具體來源:J. Polym. Sci. Part A: Polym. Chem. 2013, 51,1635-1644
發表時間:2013年
A new coil-rod-coil copolymer is synthesized via Sonogashira coupling using one-step methodology. The copolymer PEG-OEPETPT-PEG constitutes of poly(ethylene glycol) (PEG) as the coil block, and oligo[p-(ethynylenephenyleneethynylene)-alt-(thienylenepyridazinylenethienylene)] (OEPETPT) as the rod segment. The conjugated polymer PEPETPT with the same conjugated building blocks is also synthesized for comparison.The structures of both polymers are confirmed by NMR, combined with other characterizations. PEG-OEPETPTPEG has a 12 nm blue-shift in the emission maximum compared with that of PEPETPT, and a higher quantum yield of fluorescence
in THF. PEG-OEPETPTE-PEG tolerates up to 20% water content in H2O/THF mixed solvent without significantly changing the emission wavelength and intensity, while the fluorescence of PEPETPT is dramatically quenched by a very small quantity of water. Further photophysical studies about these two polymers indicate that the introduction of PEG coils onto the conjugated block retards the water-induced-aggregation and therefore improves the fluorescence stability of PEG-OEPETPT-PEG。
主站蜘蛛池模板: 灵宝市| 塔城市| 手游| 和林格尔县| 永和县| 民权县| 阿合奇县| 呈贡县| 鄄城县| 右玉县| 平潭县| 长白| 石家庄市| 卢氏县| 嘉荫县| 丰城市| 中方县| 荥经县| 遵义市| 台中县| 杭锦旗| 聊城市| 宁远县| 三亚市| 梁平县| 简阳市| 永新县| 汝城县| 汶川县| 怀集县| 东莞市| 泗水县| 南汇区| 澳门| 富裕县| 江阴市| 德令哈市| 奉节县| 乌鲁木齐县| 通化市| 高台县|