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(guān)鏈接
聯(lián)系方式
  • 通信地址:北京市海淀區(qū)清華大學(xué)化學(xué)系
  • 郵編:100084
  • 電話:010-62783668
  • 傳真:010-62783668
  • Email:yuanjy@mail.tsinghua.edu.cn
當(dāng)前位置:> 首頁 > 論文著作 > 正文
Synthesis, Characterization, and Fluorescence of Pyrene-Containing Eight-Arm Star-Shaped Dendrimer-Like Copolymer with Pentaerythritol Core
作者:Weizhong Yuan, Jinying Yuan*, Mi Zhou, Caiyuan Pan
關(guān)鍵字:atom transfer radical polymerization (ATRP); dendrimers; fluorescence;
論文來源:期刊
具體來源:J. Polym. Sci. Part A: Polym. Chem., 2008,46,2788-2798
發(fā)表時(shí)間:2008年

Novel and well-defined pyrene-containing eight-arm star-shaped dendrimer-
like copolymers were successfully achieved by combination of esterification,
atom transfer radical polymerization (ATRP), divergent reaction, ring-opening polymerization(ROP), and coupling reaction on the basis of pentaerythritol. The reaction of pentaerythritol with 2-bromopropionyl bromide permitted ATRP of styrene (St) to form four-arm star-shaped polymer (PSt-Br)4. The molecular weights of these polymers could be adjusted by the variation of monomer conversion. Eight-hydroxyl starshaped polymer (PSt-(OH)2)4 was produced by the divergent reaction of (PSt-Br)4 with diethanolamine. (PSt-(OH)2)4 was used as the initiator for ROP of e-caprolactone(CL) to produce eight-arm star-shaped dendrimer-like copolymer (PSt-b-(PCL)2)4. The molecular weights of (PSt-b-(PCL)2)4 increased linearly with the increase of monomer. After the coupling reaction of hydroxyl-terminated (PSt-b-(PCL)2)4 with 1-pyrenebutyric acid, pyrene-containing eight-arm star-shaped dendrimer-like copolymer (PSt-b-(PCL-pyrene)2)4 was obtained. The eight-arm star-shaped dendrimer-like copolymers presented unique thermal properties and crystalline morphologies, which were different from those of linear poly(e-caprolactone) (PCL). Fluorescence analysis indicated that (PSt-b-(PCL-pyrene)2)4 presented slightly stronger fluorescence intensity than 1-pyrenebutyric acid when the pyrene concentration of them was the same. The obtained pyrene-containing eight-arm star-shaped dendrimer-like copolymer has potential applications in biological fluorescent probe, photodynamic therapy, and optoelectronic devices.

主站蜘蛛池模板: 滦南县| 轮台县| 洛川县| 新蔡县| 墨竹工卡县| 松江区| 久治县| 西峡县| 西和县| 手游| 新民市| 上犹县| 郧西县| 兰坪| 珲春市| 建始县| 驻马店市| 上蔡县| 葫芦岛市| 凌海市| 芮城县| 阿巴嘎旗| 濉溪县| 沧州市| 普安县| 特克斯县| 内江市| 兴城市| 自治县| 淮北市| 乌鲁木齐县| 黄龙县| 平湖市| 青海省| 玉树县| 余江县| 安塞县| 射阳县| 焉耆| 北宁市| 宜良县|