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Determination of coordination structure on metal-substituted chlorophyll a by spectroscopy
Alternative Title金属叶绿素a 配位结构的研究
Hong, FS; Wei, ZG; Zhao, GW; Tao, Y; Hu, TD; Liu, T; Xie, YN; Tao Y(陶冶); Hu TD(胡天斗); Liu T(刘涛); Xie YN(谢亚宁)
2001
Source PublicationPROGRESS IN BIOCHEMISTRY AND BIOPHYSICS
Volume28Issue:3Pages:381-386
Corresponding AuthorSuzhou Univ, Dept Biol, Suzhou 215151, Peoples R China ; Univ Sci & Technol China, Dept Chem, Anhua 230026, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Synchrotron Radiat Lab, Beijing 100039, Peoples R China
SubtypeArticle
AbstractLa-chlorophyll-a, Sm-chlorophyll-a and Cu-chlorophyll-a were synthesized from pheophytin-a, lanthanum, samarium and cuprum in the acetone solution. Their characteristics have been investigated by ultravioler-visible (UV-Vis), FT-IR and extended X-ray absorption fine structure spectra (EXAFS). The Soret band of UV-Vis spectra of La-chlorophyll-a, Sm-chlorophyll-a and Cu-chlorophyll-a was more ultraviolet shift than that of pheophytin-a, the Q band was more red shift than that of pheophytin-a. FT-IR spectra of Lachlorophyll-a, Sm-chlorophyll-a and Cu-chlorophyll-a was similar with chlorophyll, but different from pheophytin. UV-Vis and IR spectra confirmed the coordination of La (III), Sm (III) and Cu ( II) to the porphyrin rings. By extended X-ray absorption fine structure spectra method, it was found that the molecular structure of synthesized La- Chlorophyll-a, Sm-chlorophyll-a could be well fitted by the double decker sandwich structure model that La, Sm was surrounded by eight nitrogen atoms from two porphyrin rings. It is believed that chemical form of La-chlorophyll-a, Sm-chlorophyll-a was a sandwich structured complexes with the La-N and Sm-N bond length of average 0.261 nm and 0.243nm, respectively. Extended X-ray absorption fine structure spectra showed that Cu-chlorophyll-a could be well fitted by the mono decker structure model that Cu was surrounded by four nitrogen atoms from porphyrin rings, Cu-N bond length of average was 0.197 nm. Elemental analysis indicated that La-chlorophyll-a and Sm-chlorophyll-a have the double decker sandwich structure, Cu-chlorophyll-a has the mono decker structure.
Keywordmetal-chlorophyll-a extended x-ray absorption fine spectra (EXAFS) molecular structure
Subject AreaBiochemistry & Molecular Biology; Biophysics
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Language英语
WOS Research AreaBiochemistry & Molecular Biology ; Biophysics
WOS SubjectBiochemistry & Molecular Biology ; Biophysics
WOS IDWOS:000169596600024
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Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/237253
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Hong, FS,Wei, ZG,Zhao, GW,et al. Determination of coordination structure on metal-substituted chlorophyll a by spectroscopy[J]. PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS,2001,28(3):381-386.
APA Hong, FS.,Wei, ZG.,Zhao, GW.,Tao, Y.,Hu, TD.,...&谢亚宁.(2001).Determination of coordination structure on metal-substituted chlorophyll a by spectroscopy.PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS,28(3),381-386.
MLA Hong, FS,et al."Determination of coordination structure on metal-substituted chlorophyll a by spectroscopy".PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS 28.3(2001):381-386.
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