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题名: Multifunctional human serum albumin in the surface-enhanced Raman spectroscopy of porphyrin: demetalation promoter, molecular spacer and stabilizer
作者: Jia, Guoqing1, 2;  Feng, Zhaochi1;  Wei, Chunying1;  Li, Can1
关键词: SERS ;  H(2)TMPyP4 ;  Ag(II)TMPyP4 ;  demetalation ;  molecular spacer
刊名: JOURNAL OF RAMAN SPECTROSCOPY
发表日期: 2010-12-01
DOI: 10.1002/jrs.2611
卷: 41, 期:12, 页:1615-1620
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Spectroscopy
研究领域[WOS]: Spectroscopy
英文摘要: Human serum albumin (HSA), a model protein, was introduced to the surface-enhanced Raman spectroscopy (SERS) of cationic porphyrin 5,10,15,20-tetrakis(1-methyl-4-pyridyl)-21H,23H-porphine (H(2)TMPyP4). HSA was found to have a great influence not only on Ag nanoparticle aggregation state but also on the interaction between Ag nanoparticle and H(2)TMPyP4 molecules. In the (H(2)TMPyP4-Ag colloid)/HSA system, addition of H(2)TMPyP4 to Ag colloid led to a quick Ag colloid aggregation, and subsequent HSA addition could stabilize this system. The SERS spectrum was dominated by a combination of Ag(II)TMPyP4 and free base H(2)TMPyP4. More interestingly, a photoinduced demetalation of Ag(II)TMPyP4 to free base H(2)TMPyP4 was observed in the (H(2)TMPyP4-Ag colloid)/HSA system. This demetalation process was partially reversible when the laser was turned off or the laser power was reduced. In this case, HSA acts as both a stabilizer and a demetalation promoter. In the (HSA-H(2)TMPyP4)/Ag colloid system, when H(2)TMPyP4 was premixed with HSA prior to the Ag colloid addition, no obvious Ag colloid aggregation appeared, and the SERS spectrum was just characteristic of free base H(2)TMPyP4. In this case, HSA is proposed to function as both a stabilizer and a molecular spacer. Copyright (C) 2010 John Wiley & Sons, Ltd.
关键词[WOS]: FREE-BASE PORPHYRIN ;  ABLATED AG COLLOIDS ;  RESONANCE RAMAN ;  NUCLEIC-ACIDS ;  SILVER ;  SCATTERING ;  METALATION ;  NANOPARTICLES ;  PARTICLES ;  KINETICS
语种: 英语
WOS记录号: WOS:000286151400008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141904
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Jia, Guoqing,Feng, Zhaochi,Wei, Chunying,et al. Multifunctional human serum albumin in the surface-enhanced Raman spectroscopy of porphyrin: demetalation promoter, molecular spacer and stabilizer[J]. JOURNAL OF RAMAN SPECTROSCOPY,2010,41(12):1615-1620.
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