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Raman resonance

This spectrum is called a Raman spectrum and corresponds to the vibrational or rotational changes in the molecule. The selection rules for Raman activity are different from those for i.r. activity and the two types of spectroscopy are complementary in the study of molecular structure. Modern Raman spectrometers use lasers for excitation. In the resonance Raman effect excitation at a frequency corresponding to electronic absorption causes great enhancement of the Raman spectrum. [Pg.340]

The varying actual orientation of molecules adsorbed at an aqueous solution-CCU interface with decreasing A has been followed by resonance Raman spectroscopy using polarized light [130]. The effect of pressure has been studied for fatty alcohols at the water-hexane [131] and water-paraffin oil [132] interfaces. [Pg.85]

Resonance Raman reflection spectroscopy of monolayers is possible, as illustrated in Fig. IV-14 for cetyl orange [157]. The polarized spectra obtained with an Ar ion laser allowed estimates of orientational changes in the cetyl orange molecules with a. [Pg.127]

Fig. IV-14. Resonance Raman Spectra for cetyl orange using 457.9-nm excitation. [From T. Takenaka and H. Fukuzaki, Resonance Raman Spectra of Insoluble Monolayers Spread on a Water Surface, J. Raman Spectr., 8, 151 (1979) (Ref. 157). Copyright Heyden and Son, Ltd., 1979 reprinted by permission of John Wiley and Sons, Ltd.]... Fig. IV-14. Resonance Raman Spectra for cetyl orange using 457.9-nm excitation. [From T. Takenaka and H. Fukuzaki, Resonance Raman Spectra of Insoluble Monolayers Spread on a Water Surface, J. Raman Spectr., 8, 151 (1979) (Ref. 157). Copyright Heyden and Son, Ltd., 1979 reprinted by permission of John Wiley and Sons, Ltd.]...
RRS Resonance Raman spectroscopy [212, 213] Incident light is of wave length corresponding to an absorption band Enhanced sensitivity... [Pg.318]

The behavior of insoluble monolayers at the hydrocarbon-water interface has been studied to some extent. In general, a values for straight-chain acids and alcohols are greater at a given film pressure than if spread at the water-air interface. This is perhaps to be expected since the nonpolar phase should tend to reduce the cohesion between the hydrocarbon tails. See Ref. 91 for early reviews. Takenaka [92] has reported polarized resonance Raman spectra for an azo dye monolayer at the CCl4-water interface some conclusions as to orientation were possible. A mean-held theory based on Lennard-Jones potentials has been used to model an amphiphile at an oil-water interface one conclusion was that the depth of the interfacial region can be relatively large [93]. [Pg.551]

Fig. XVI-5. Resonance Raman spectra of MDMA adsorbed on ZnO (a) in the presence of 100 torr of NH3 (b) after evacuation of the NH3 from the cell. [Reprinted with permission from J. F. Brazdil and E. B, Yeager, J. Phys. Chem., 85, 1005 (1981) (Ref. 79). Copyright 1981, American Chemical Society.]... Fig. XVI-5. Resonance Raman spectra of MDMA adsorbed on ZnO (a) in the presence of 100 torr of NH3 (b) after evacuation of the NH3 from the cell. [Reprinted with permission from J. F. Brazdil and E. B, Yeager, J. Phys. Chem., 85, 1005 (1981) (Ref. 79). Copyright 1981, American Chemical Society.]...
SERS. A phenomenon that certainly involves the adsorbent-adsorbate interaction is that of surface-enhanced resonance Raman spectroscopy, or SERS. The basic observation is that for pyridine adsorbed on surface-roughened silver, there is an amazing enhancement of the resonance Raman intensity (see Refs. 124—128). More recent work has involved other adsorbates and colloidal... [Pg.591]

The pioneering use of wavepackets for describing absorption, photodissociation and resonance Raman spectra is due to Heller [12, 13,14,15 and 16]- The application to pulsed excitation, coherent control and nonlinear spectroscopy was initiated by Taimor and Rice ([17] and references therein). [Pg.235]

In this section we will discuss more conventional spectroscopies absorption, emission and resonance Raman scattering. These spectroscopies are generally measured under single frequency conditions, and therefore our... [Pg.244]

Figure Al.6.14. Schematic diagram showing the promotion of the initial wavepacket to the excited electronic state, followed by free evolution. Cross-correlation fiinctions with the excited vibrational states of the ground-state surface (shown in the inset) detennine the resonance Raman amplitude to those final states (adapted from [14]. Figure Al.6.14. Schematic diagram showing the promotion of the initial wavepacket to the excited electronic state, followed by free evolution. Cross-correlation fiinctions with the excited vibrational states of the ground-state surface (shown in the inset) detennine the resonance Raman amplitude to those final states (adapted from [14].
Figure Al.6.15. Schematic diagram, showing the time-energy uncertainty principle operative in resonance Raman scattering. If the incident light is detuned from resonance by an amount Aco, the effective lifetime on the excited-state is i 1/Aco (adapted from [15]). Figure Al.6.15. Schematic diagram, showing the time-energy uncertainty principle operative in resonance Raman scattering. If the incident light is detuned from resonance by an amount Aco, the effective lifetime on the excited-state is i 1/Aco (adapted from [15]).
The more conventional, energy domain fonnula for resonance Raman scattering is the expression by Kramers-Heisenberg-Dirac (KHD). The differential cross section for Raman scattering into a solid angle dD can be written in the fomi... [Pg.252]

Myers A B and Mathies R A 1987 Resonance Raman intensities A probe of excited-state structure and dynamics Biological Applications of Raman Spectroscopy yo 2, ed T G Spiro (New York Wiley-Interscience) pp 1-58... [Pg.280]

A beautiful, easy-to-read introduction to wavepackets and their use in interpreting molecular absorption and resonance Raman spectra. [Pg.282]

Infrared and Raman spectroscopy each probe vibrational motion, but respond to a different manifestation of it. Infrared spectroscopy is sensitive to a change in the dipole moment as a function of the vibrational motion, whereas Raman spectroscopy probes the change in polarizability as the molecule undergoes vibrations. Resonance Raman spectroscopy also couples to excited electronic states, and can yield fiirtlier infomiation regarding the identity of the vibration. Raman and IR spectroscopy are often complementary, both in the type of systems tliat can be studied, as well as the infomiation obtained. [Pg.1150]

One of the well known advantages of resonance Raman spectroscopy is that samples dissolved in water can be studied since water is transparent in the visible region. Furthennore, many molecules of biophysical interest assume their native state in water. For this reason, resonance Raman spectroscopy has been particularly strongly embraced in the biophysical connnunity. [Pg.1151]

The siim-over-states method for calculating the resonant enlrancement begins with an expression for the resonance Raman intensity, /.y, for the transition from initial state to final state /in the ground electronic state, and is given by [14]... [Pg.1161]

It is also possible to detennine the resonant Raman intensities via a time-dependent method [16]. It has the... [Pg.1161]

The advantages of resonance Raman spectroscopy have already been discussed in section BL2.2.3. For these reasons it is rapidly becoming the method of choice for studying large molecules in solution. Flere we will present one study that exemplifies its attributes. There are two complementary methods for studying proteins. [Pg.1170]

First, it is possible to excite a chromophore corresponding to the active site, and detennine which modes interact with it. Second, by using UV excitation, the amino acids with phenyl rings (tryptophan and tyrosine, and a small contribution from phenylalanine) can be selectively excited [4], The frequency shifts in the resonance Raman spectrum associated with them provide infomiation on their enviromnent. [Pg.1171]

Infonuation about the haeme macrocycle modes is obtained by comparing the resonance Raman spectra of deoxyHb with HbCO. The d-d transitions of the metal are too weak to produce large enliancement, so the... [Pg.1172]

The Fe-N mode is at 222 in the R state and 207 cnY in the T state for the a subunits, but only shifted to 218 T state for the (3 subunits. This is consistent with the interpretation that the Fe-imidazole interations are weakened more in the T state of the a subunits than p subunits. Time-resolved resonance Raman studies have shown that the R T switch is complete on a 10 ps tuuescale [38]. Finally, UV excitation of the aromatic protein side chains yields... [Pg.1172]

Time-resolved spectroscopy has become an important field from x-rays to the far-IR. Both IR and Raman spectroscopies have been adapted to time-resolved studies. There have been a large number of studies using time-resolved Raman [39], time-resolved resonance Raman [7] and higher order two-dimensional Raman spectroscopy (which can provide coupling infonuation analogous to two-dimensional NMR studies) [40]. Time-resolved IR has probed neutrals and ions in solution [41, 42], gas phase kmetics [42] and vibrational dynamics of molecules chemisorbed and physisorbed to surfaces [44]- Since vibrational frequencies are very sensitive to the chemical enviromnent, pump-probe studies with IR probe pulses allow stmctiiral changes to... [Pg.1172]

Asher S A 1993 UV resonance Raman-spectroscopy for analytical, physical and biophysical chemistry 2 Anal. Chem. [Pg.1175]

Asher S A and Chi Z H 1998 UV resonance Raman studies of protein folding in myoglobin and other proteins Biophys. [Pg.1175]

Bell S E J 1996 Time-resolved resonance Raman spectroscopy A/ a/ysf 121 R107-20... [Pg.1175]

Biswas N and Umapathy S 1998 Resonance Raman spectroscopy and ultrafast chemical dynamics Curr. Sol. 74 328-40... [Pg.1175]

Chi Z H, Chen X G, Holtz J S W and Asher S A 1998 UV resonance Raman-selective amide vibrational enhancement quantitative methodology for determining protein secondary structure Biochemistry 27 2854-64... [Pg.1175]

Hoskins L C 1984 Resonance Raman-spectroscopy of beta-carotene and lycopene—a physical-chemistry experiment J. Chem. Educ. 61 460-2... [Pg.1175]

Johnson B R, Kittrell C, Kelly P B and Kinsey J L 1996 Resonance Raman spectroscopy of dissociative polyatomic molecules J. Chem. Educ. 100 7743-64... [Pg.1175]

Kincaid J R 1995 Structure and dynamics of transient species using time-resolved resonance Raman-spectroscopy Biochemical Spectroscopy Methods Enzymol. vol 246, ed K Sauer (San Diego, CA Academic) pp 460-501... [Pg.1175]

Strommen D P and Nakamoto K 1977 Resonance Raman-spectroscopy J. Chem. Educ. 54 474-8... [Pg.1175]

Zhong Y and McHale J L 1997 Resonance Raman study of solvent dynamics in electron transfer. II. Betaine-30 in... [Pg.1175]

Shreve A P and Mathies R A 1995 Thermal effects in resonance Raman-scattering—analysis of the Raman intensities of rhodopsin and of the time-resolved Raman-scattering of bacteriorhodopsin J. Phys. Chem. 99 7285-99... [Pg.1176]


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1.2- Dithiolenes resonance Raman spectroscopy

A resonance Raman spectrum

Azulene resonance Raman

Bacteriorhodopsin resonance Raman spectrum

Benzene resonance Raman

Biological systems, resonance Raman spectroscopy

Blue copper proteins resonance Raman spectroscopy

Bromine, resonance Raman

Carotenoids resonance Raman spectra

Carotenoids resonance raman spectroscopy

Contents 3 Resonance Raman scattering

Continuum resonance Raman scattering

Cross Section resonant Raman

Diatomic resonance Raman spectroscopy

Double resonance Raman process

Electrochemical resonance Raman sensitivity enhancement

Excitation profile, resonance Raman effect

Ferredoxin resonance Raman spectroscopy

Fourier transform near-infrared Raman nuclear magnetic resonance

Fourier transform resonance Raman spectroscopy

Halogens, resonance Raman

Heme proteins resonance Raman spectra

Heme proteins resonance Raman spectroscopy

Hemerythrin, resonance Raman spectroscopy

Hemocyanin, oxyEXAFS resonance Raman spectra

Hemoglobin resonance Raman

Hemoglobin resonance Raman spectroscopy

Inorganic ions, resonance Raman

Iodine resonance Raman

Iron-sulfur proteins resonance Raman spectra

Lutein resonance Raman spectroscopy

Measurement time-resolved resonance Raman

Membranes resonance Raman probes

Molecular distortions from resonance Raman

Molecular distortions in metal-containing compounds resonance Raman excitation profiles

Molecular vibrations resonance Raman spectroscopy

Myoglobin resonance Raman spectroscopy

Nanosecond Time-Resolved Resonance Raman

Nuclear magnetic resonance Raman

Nucleic acids resonance Raman studies

Optical properties, spectroscopy resonant Raman

Organic Interface Formation Studied In Situ by Resonant Raman Spectroscopy

Poly resonance Raman spectrum

Polyacetylene Resonance Raman Scattering

Pre-resonance Raman effect

Principle of Resonance Raman Spectroscopy

Purple acid phosphatases resonance Raman

Raman Stokes resonance

Raman effect resonant

Raman electron paramagnetic resonance

Raman magnetic resonance

Raman resonant impulsive stimulated

Raman scattering Stokes resonance

Raman scattering continuous resonance

Raman scattering discrete resonance

Raman scattering surface enhanced resonance

Raman spectra resonance with continuum

Raman spectroscopy resonance effect

Raman studies, resonance

Raman, resonance measurements

Reaction center resonance Raman spectroscopy

Resonance Raman 3-carotene

Resonance Raman Experiments

Resonance Raman Instrumentation

Resonance Raman contribution

Resonance Raman cross-section

Resonance Raman detection

Resonance Raman effect

Resonance Raman effects transition

Resonance Raman enhancement

Resonance Raman enhancement profiles

Resonance Raman excitation

Resonance Raman excitation profile

Resonance Raman excitation spectroscopy

Resonance Raman family

Resonance Raman labels

Resonance Raman methods

Resonance Raman process

Resonance Raman process, Stokes

Resonance Raman reaction center-bound spheroidene

Resonance Raman scattering

Resonance Raman scattering amplitude

Resonance Raman scattering effective lifetime

Resonance Raman scattering time-resolved

Resonance Raman spectra

Resonance Raman spectroscopy

Resonance Raman spectroscopy alkali

Resonance Raman spectroscopy apparatus

Resonance Raman spectroscopy bacteriorhodopsin

Resonance Raman spectroscopy centers

Resonance Raman spectroscopy charge transfer transitions

Resonance Raman spectroscopy complexes

Resonance Raman spectroscopy coupling

Resonance Raman spectroscopy determination

Resonance Raman spectroscopy dichroism

Resonance Raman spectroscopy dimer

Resonance Raman spectroscopy electronic band assignments

Resonance Raman spectroscopy excitation profile

Resonance Raman spectroscopy excitation sources

Resonance Raman spectroscopy excited-state spectroscopic probes

Resonance Raman spectroscopy formation

Resonance Raman spectroscopy four-coordinate structure

Resonance Raman spectroscopy instrumentation

Resonance Raman spectroscopy of bacteriorhodopsin

Resonance Raman spectroscopy of biochemical and biological systems

Resonance Raman spectroscopy photoionization

Resonance Raman spectroscopy porphyrins

Resonance Raman spectroscopy structure

Resonance Raman spectroscopy technique

Resonance Raman spectroscopy trimer

Resonance Raman spectroscopy vapors

Resonance Raman spectroscopy wavelength selection

Resonance Raman spectroscopy, RRS

Resonance Raman spectroscopy, methane

Resonance Raman spectroscopy/microscopy

Resonance Raman studies of the primary event

Resonance Raman technique

Resonance Raman theories

Resonance Raman triplet carotenoid

Resonance Raman twisting modes

Resonance Raman-enhanced bands

Resonance raman, ultraviolet

Resonant Raman Auger

Resonant Raman Auger process

Resonant Raman Scattering (RRS)

Resonant Raman spectroscopy

Resonant stimulated Raman scattering process

Rhodobacter sphaeroides resonance Raman spectroscopy

Ribonucleotide reductase resonance Raman

SERS and Surface-Enhanced Resonant Raman Spectroscopy

Scattering Raman resonant

Solid-state nuclear magnetic resonance Raman spectroscopy

Spatially resolved resonance Raman imaging

Spectra, Raman time-resolved resonance

Spectroscopy fluorescence Resonance Raman

Spectroscopy magnetic resonance... Raman

Spectroscopy resonance Raman scattering

Stimulated resonance Raman scattering

Stimulated resonant Raman transition

Surface Resonance Raman Spectroscopy (SRRS)

Surface resonance Raman spectroscopy

Surface-enhanced resonance Raman

Surface-enhanced resonance Raman scattering (SERRS

Surface-enhanced resonance Raman scattering enhancement

Surface-enhanced resonance Raman scattering fluorescence

Surface-enhanced resonance Raman spectroscopy

Surface-enhanced resonance Raman spectroscopy SERRS)

Surface-enhanced resonant Raman

Surface-enhanced resonant Raman spectroscopy

The Resonance Raman Effect

The Wavepacket Picture of Resonance Raman Scattering

Thermal effects in resonance Raman scattering

Time-Resolved Resonance Raman

Time-Resolved Resonance Raman Spectroscopy

Time-resolved resonance Raman apparatus

Time-resolved resonance Raman applications

Time-resolved resonance Raman spectroscopy difference spectra

Time-resolved resonance Raman spectroscopy pulsed lasers

Total internal reflection resonance Raman

Transient species, resonance Raman spectroscop

UV resonance Raman spectroscopy

Ultrafast Time-Resolved Resonance Raman

Uteroferrin resonance Raman

Various applications of resonance Raman spectroscopy

Vibrational resonance Raman

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