Surface-enhanced resonance raman scattering from copper(II) 5,10,15,20-tetrakis(1-methyl-4-pyridyl)porphyrin adsorbed on aggregated and nonaggregated silver colloids

被引:31
作者
Prochazka, M
Mojzes, P
Vlckova, B
Turpin, PY
机构
[1] UNIV PARIS 06,CNRS,URA 2056,LPBC,F-75252 PARIS 5,FRANCE
[2] CHARLES UNIV,FAC SCI,DEPT PHYS & MACROMOL CHEM,CZ-12840 PRAGUE 2,CZECH REPUBLIC
[3] CHARLES UNIV,INST PHYS,CZ-12116 PRAGUE 2,CZECH REPUBLIC
来源
JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 16期
关键词
D O I
10.1021/jp963721m
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Surface-enhanced resonance Raman scattering (SERRS) from copper(II) 5,10,15,20-tetrakis(1-methyl-4-pyridyl)porphyrin (CuTMPyP(4)) adsorbed on a borohydride-reduced silver colloid was studied as a function of CuTMPyP(4) concentration ranging from 1 x 10(-9) to 1 x 10(-6) M, using the 441.6 nm excitation line of a He-Cd laser. The OH stretching band of bulk water was employed as an internal intensity standard for normalization of the porphyrin SERRS spectra, The surface coverage of Ag colloidal particles by porphyrin molecules as well as the surface plasmon absorption (SPA) and morphology of the Ag colloid/CuTMPyP(4) systems in dependence on the total porphyrin concentration in the systems were investigated and related to the concentration dependence of the SERRS signal. The plots of the intensities of 12 SERRS spectral bands of the Al, porphyrin modes against the porphyrin concentration are found to be fairly linear for systems with the total porphyrin concentrations 1 x 10(-8) to 2 x 10(-7) M, in which all porphyrin molecules introduced into the system are adsorbed on isolated Ag colloidal particles and/or small aggregates of ca. 30-70 particles. By contrast, these plots become highly nonlinear and mode-frequency dependent for systems with total porphyrin concentrations greater than or equal to 3 x 10(-7) M containing large aggregates of > 100 porphyrin-covered Ag colloidal particles as well as fractions of residual nonadsorbed porphyrin molecules. While the former systems are stable for at least one month and provide a highly reproducible SERRS signal, the stability of the latter ones is limited to several hours. Employment of the 441.6 nm excitation coincident with both the Soret band of the porphyrin and the onset of the SPA band of isolated Ag colloidal particles is thus shown to provide a rather unique possibility of obtaining reproducible SERRS spectra with a linear concentration dependence from pico- to nanomolar quantities of a cationic metalloporphyrin adsorbed on nonaggregated and/or weakly aggregated Ag colloidal particles.
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页码:3161 / 3167
页数:7
相关论文
共 29 条
[1]   SURFACE-ENHANCED RAMAN-SPECTROSCOPY OF CO ADSORBED ON COLLOIDAL SILVER PARTICLES [J].
ABE, H ;
MANZEL, K ;
SCHULZE, W ;
MOSKOVITS, M ;
DILELLA, DP .
JOURNAL OF CHEMICAL PHYSICS, 1981, 74 (02) :792-797
[2]   RESONANCE RAMAN STUDIES OF METAL "TETRAKIS(4-N-METHYLPYRIDYL)PORPHINE - BAND ASSIGNMENTS, STRUCTURE-SENSITIVE BANDS, AND SPECIES EQUILIBRIA [J].
BLOM, N ;
ODO, J ;
NAKAMOTO, K ;
STROMMEN, DP .
JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (13) :2847-2852
[3]   ELECTRONIC-SPECTRA, RESONANCE RAMAN-SPECTRA AND SOLUTION PROPERTIES OF WATER-SOLUBLE CU(II), NI(II) AND CO(III) PORPHYRINS [J].
BUTJE, K ;
NAKAMOTO, K .
INORGANICA CHIMICA ACTA, 1990, 167 (01) :97-108
[4]   SURFACE-ENHANCED RAMAN-SCATTERING (SERS) SPECTROSCOPY WITH BOROHYDRIDE-REDUCED SILVER COLLOIDS - CONTROLLING ADSORPTION OF THE SCATTERING SPECIES BY SURFACE-POTENTIAL OF SILVER COLLOID [J].
CERMAKOVA, K ;
SESTAK, O ;
MATEJKA, P ;
BAUMRUK, V ;
VLCKOVA, B .
COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS, 1993, 58 (11) :2682-2694
[5]  
Creighton J.A., 1982, SURFACE ENHANCED RAM, P315
[6]   PLASMA RESONANCE ENHANCEMENT OF RAMAN-SCATTERING BY PYRIDINE ADSORBED ON SILVER OR GOLD SOL PARTICLES OF SIZE COMPARABLE TO THE EXCITATION WAVELENGTH [J].
CREIGHTON, JA ;
BLATCHFORD, CG ;
ALBRECHT, MG .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1979, 75 :790-798
[7]  
EESLEY GL, 1981, PHYS LETT A, V81, P193, DOI 10.1016/0375-9601(81)90060-8
[8]   SURFACE ENHANCED RAMAN-SPECTROSCOPY OF HALIDE-IONS ON COLLOIDAL SILVER - MORPHOLOGY AND COVERAGE DEPENDENCE [J].
GARRELL, RL ;
SHAW, KD ;
KRIMM, S .
SURFACE SCIENCE, 1983, 124 (2-3) :613-624
[9]   THE CHARACTERIZATION OF AG SOLS BY ELECTRON-MICROSCOPY, OPTICAL-ABSORPTION, AND ELECTROPHORESIS [J].
HEARD, SM ;
GRIESER, F ;
BARRACLOUGH, CG ;
SANDERS, JV .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1983, 93 (02) :545-555
[10]  
HEARD SM, 1983, CHEM PHYS LETT, V93, P154