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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (6): 690-696. 上一篇    

研究简报

一种含咔唑基团的混配型钌(II)配合物的合成、表征和酸碱性质研究

凡素华1, 杨维春1,2, 王科志*,1   

  1. (1北京师范大学化学学院 北京 100875)
    (2平顶山学院化学化工学院 平顶山 467002)
  • 投稿日期:2007-08-09 修回日期:2007-09-19 发布日期:2008-03-28
  • 通讯作者: 王科志

Synthesis, Characterization and Acid-base Properties of a Carbazol- containing Mixed Ligand Ruthenium(II) Complex

FAN Su-Hua1; YANG Wei-Chun1,2; WANG Ke-Zhi*,1   

  1. (1 College of Chemistry, Beijing Normal University, Beijing 100875)
    (2 College of Chemistry and Chemical Engineering, Pingdingshan University, Pingdingshan 467002)
  • Received:2007-08-09 Revised:2007-09-19 Published:2008-03-28
  • Contact: WANG Ke-Zhi

PDF

778

被引次数

10

合成了钌(II)配合物cis-[Ru(HL)(Hdcbpy)(NCS)2]－•[N(C4H9)4]＋ (HL＝2-(9-乙基-9H-3-咔唑基)-1H-咪唑[4,5-f] [1,10]邻菲啰啉, H2dcbpy＝4,4'-二羧酸-2,2'-联吡啶). 采用元素分析、核磁共振氢谱、红外光谱、紫外-可见吸收光谱、质谱(MS)对配合物进行了表征. 通过紫外-可见吸收光谱和稳态荧光光谱, 研究了该配合物的基态和激发态酸碱性质. 结果表明该配合物在基态时能发生5步质子化/去质子化反应, 表现出基于光致发光强度和激发态能量转移途径的质子化/去质子化诱导的分子开关性质.

关键词: 钌, 邻菲啰啉, 咔唑, 分子开关, pH

A novel ruthenium complex of cis-[Ru(HL)(Hdcbpy)(NCS)2]－•[N(C4H9)4]＋ (where HL＝2-(9-ethyl-9H-carbazol-3-yl)-1H-imidazo[4,5-f][1,10]phenanthroline and H2dcbpy＝4,4'-dicarboxy-2,2'- bipyridyl) has been synthesized and characterized by elemental analysis, 1H NMR, IR and UV-vis absorption spectroscopies, and MALDI-TOF mass spectrometry. The ground- and excited-state acid-base properties of the complex have been studied by means of UV-visible absorption and emission spectrophotometric titrations. The complex was shown to act as pH-induced molecular switches based on the changes in emission intensities and excited state energy-transfer routes.

Key words: ruthenium, phenanthroline, carbazole, molecular switch, pH