四苯基卟啉镁的合成、表征及光化学性质

四苯基卟啉镁的合成、表征及光化学性质

张鹏燕2

张建斌1

于熙昌2

张凌伟3

魏雄辉1,*

(1北京大学化学与分子工程学院,北京

100871;

2

内蒙古工业大学化工学院,呼和浩特010051;

3

北京博源恒升高科技有限公司,北京

100080)

摘要:提出一种以乙酸镁和乙酸钠为原料合成四苯基卟啉镁(MgTPP)的新方法,合成样品以柱层析法进行分离

纯化.分离产物经UV ⁃Vis 、1

H ⁃NMR 、MALDI ⁃TOF ⁃MS(基质辅助激光解吸电离飞行时间质谱)等技术表征,确定

为MgTPP.UV ⁃Vis 光谱分析结果表明,四苯基卟啉镁的Soret 吸收带为424nm,Q 吸收带为563nm 和602nm.此外,光照对MgTPP 的二氯甲烷溶液光谱性质的影响结果表明,经光照射后MgTPP 的UV ⁃Vis 光谱的Soret 吸收带吸收强度明显降低,同时,经550nm 的光激发产生的荧光有明显的猝灭.对光照后的MgTPP 样品进行MALDI ⁃TOF ⁃MS 分析,发现有新的质核比(m/z )出现,其为668,这一结果表明,在光照条件下,MgTPP 分子可能与氧分子发生光化学作用,形成MgTPP 与氧的复合物MgTPP ⁃O 2.关键词：四苯基卟啉镁；减色效应；结合氧中图分类号：O644.14

Synthesis,Characterization and Photochemical Characteristic of

Magnesium Tetraphenyl Porphyrin

ZHANG Peng ⁃Yan 2

ZHANG Jian ⁃Bin 1

YU Xi ⁃Chang 2

ZHANG Ling ⁃Wei 3

WEI Xiong ⁃Hui 1,*

(1College of Chemistry and Molecular Engineering,Peking University,Beijing

100871,P.R.China;

2

College of Chemical Engineering,Inner Mongolia University of Technology,Huhhot 010051,P.R.China;

3

Beijing Boyuan Hengsheng High ⁃Technology Co.,Ltd.,Beijing

100080,P.R.China )

Abstract ：A new synthetic way of magnesium tetraphenyl porphyrin (MgTPP)was presented,by which MgTPP was synthesized with tetraphenyl porphyrin and magnesium acetate,and purified by chromatography.The purified sample was confirmed as MgTPP by UV ⁃Vis spectral method,1H ⁃NMR method,and matrix assisted laser desorption ionization time of filight mass spectrometry (MALDI ⁃TOF ⁃MS)method.The sample ′s Soret band was shown at 424nm,and Q band was shown at 563nm and 602nm in UV ⁃Vis spectra.In addition,the spectral characters of MgTPP were studied after irradiating with incandescent light by UV ⁃Vis spectral method and fluorescence spectral method.The results showed that the Soret band of MgTPP decreased remarkably with the increasing of irradiation time in the UV ⁃Vis spectra,and fluorescence quenching was observed in the fluorescence spectra with 550nm as excitation wavelength.Meanwhile,a new molecular ion peak 668(m/z )in the MALDI ⁃TOF ⁃MS was shown,indicating that the coordinated complex of MgTPP ⁃O 2may be formed by the photochemical interaction between MgTPP molecules and oxygen molecules under the illumination condition.Key Words ：Magnesium tetraphenyl porphyrin;

Hypochromic effect;

Linking oxygen

[Note]

物理化学学报(Wuli Huaxue Xuebao )

Acta Phys.⁃Chim.Sin .,2008,24(1)：143-146

9,2007;Published on Web:November 12,2007.∗

Corresponding author.Email:xhwei@;Tel:+8610⁃62751529

ⒸEditorial office of Acta Physico ⁃Chimica Sinica

叶绿素广泛存在于绿色植物中,是绿色植物以

光合作用方式将太阳能转化成化学能从而维系自身

January 143