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:蘭州市 西北師范大學 高分子研究所
  • 郵編:730070
  • 電話:0931-7970358
  • 傳真:
  • Email:wangrm@nwnu.edu.cn
當前位置:> 首頁 > 論文著作 > 正文
Photosensitized Reduction of Water to Hydrogen Using Human Serum Albumin Complexed with Zinc-Protoporphyrin IX
作者:T. Komatsu, Rong-MinWang, P. A. Zunszain, S. Curry, E. Tsuchida
關鍵字:Biopolymer complexes, rHSA, Zn-protoporphyrin IX
論文來源:期刊
具體來源:J. Am. Chem. Soc., 2006, 128(50), 16297-16301
發表時間:2006年
We present the photophysical properties of complexes of recombinant human serum albumin (rHSA) with Zn(II)-protoporphyrin IX (ZnPP) and their activities in the photosensitized reduction of water to hydrogen (H2) using methyl viologen (MV2+) as an electron relay. The ZnPP is bound in subdomain IB of wild-type rHSA [rHSA(wt)] by an axial coordination of Tyr-161 and, in the rHSA(I142H/Y161L) mutant [rHSA(His)], by a His-142 coordination. Both the rHSA(wt)-ZnPP and rHSA(His)-ZnPP complexes showed a long-lived photoexcited triplet state with lifetimes (?T) of 11 and 2.5 ms, respectively. The accommodation of ZnPP into the protein matrix efficiently eliminated the collisional triplet self-quenching process. The addition of a water-soluble electron acceptor, MV2+, resulted in a significant decrease in the triplet lifetime. The transition absorption spectrum revealed the oxidative quenching of rHSA-3ZnPP* by MV2+. The quenching rate constant ( kq) and backward electron transfer rate constant ( kb) were determined to be 1.4  107 and 4.7  108 M-1 s-1 for rHSA(wt)-ZnPP. In the presence of the colloidal PVA-Pt as a catalyst and triethanolamine (TEOA) as a sacrificial electron donor, the photosensitized reduction of water to H2 takes place. The efficiency of the photoproduction of H2 was greater than that of the system using the wellknown organic chromophore, tetrakis(1-methylpyridinium-4-yl)porphinatozinc(II) (ZnTMPyP4+), under the same conditions.
主站蜘蛛池模板: 武邑县| 阿拉善左旗| 凤庆县| 科尔| 鄯善县| 紫云| 沙雅县| 南宫市| 河源市| 渑池县| 光山县| 湘乡市| 蓬溪县| 合阳县| 桃源县| 嘉禾县| 五大连池市| 大渡口区| 凯里市| 繁昌县| 普陀区| 九龙城区| 昆山市| 册亨县| 平度市| 凤山市| 上思县| 衡水市| 阳春市| 仲巴县| 宜兰市| 焉耆| 连江县| 卢湾区| 南京市| 志丹县| 普安县| 温宿县| 荃湾区| 泊头市| 攀枝花市|