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Spectroscopy of Excited States

The large population density Nj which can be achieved in selectively excited levels E by optical pumping with lasers allows one to perform high-resolution spectroscopy of excited molecules with sufficient sensitivity. Many of the techniques applicable to molecules in their ground states (e.g., absorption spectroscopy, optical pumping, LIF, microwave spectroscopy) can be now transferred to transitions between excited states. In the following sections we briefly discuss some of these methods. [Pg.423]

F. Laermer, T. Elsaeser, and W. Kaiser, Femtosecond spectroscopy of excited-state proton-transfer in 2-(2 -hydroxyphenyl)benzothiazole, Chem, Phys. Lett. 148, 119(1988). [Pg.143]

Tong M, Sheng CX, Vardeny ZV (2007) Nonlinear optical spectroscopy of excited states in polyfluorene. Phys Rev B 75(12)... [Pg.222]

IV. Resonance Raman Spectroscopy of Excited States of Carotenoids.195... [Pg.189]

Resonance Raman Spectroscopy and Carotenoid Stereochemistry Resonance Raman Spectroscopy of Excited States of Carotenoids Resonance Raman of Carotenoid Molecules In Vivo Light-Hanresting Proteins... [Pg.409]

W.E. Ernst and J.O. Schroder, Microwave-optical polarization spectroscopy of excited states, Phys.Rev.A 30 665 (1984). [Pg.200]

The intermediate neglect of differential overlap scheme developed by Rdsch, Zemer, and co-workers for the ground state (INDO/0) and the spectroscopy of excited states (INDO/S) allows an even larger reduction of the computational effort. The method appears to give rather accurate results for the lanthanide series however, owing to missing experimental data for the parametrization the performance for the actinide series appears to be less satisfactory. [Pg.1482]

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]

The interpretation of emission spectra is somewhat different but similar to that of absorption spectra. The intensity observed m a typical emission spectrum is a complicated fiinction of the excitation conditions which detennine the number of excited states produced, quenching processes which compete with emission, and the efficiency of the detection system. The quantities of theoretical interest which replace the integrated intensity of absorption spectroscopy are the rate constant for spontaneous emission and the related excited-state lifetime. [Pg.1131]

The term excited state spectroscopy can have two different meanings, both of which will be treated in this chapter (I) probing the different excited stales of a material, the pathways to reach them, and the properties of these states and (2) a significant population of one or more of the excited states and the subsequent probing of the contribution of these states to the material s properties. Before going into details, a selected set of principal experiments in the area of excited states spectroscopy will be outlined. In order to detect the excitation process within a bulk material one can use ... [Pg.147]

A suitable method for a detailed investigation of stimulated emission and competing excited state absorption processes is the technique of transient absorption spectroscopy. Figure 10-2 shows a scheme of this technique. A strong femtosecond laser pulse (pump) is focused onto the sample. A second ultrashort laser pulse (probe) then interrogates the transmission changes due to the photoexcita-lions created by the pump pulse. The signal is recorded as a function of time delay between the two pulses. Therefore the dynamics of excited state absorption as... [Pg.169]

Glasbeek M (2001) Excited State Spectroscopy and Excited State Dynamics of Rh(III) and Pd(II) Chelates as Studied by Optically Detected Magnetic Resonance Techniques. 213 95-142 Glass RS (1999) Sulfur Radical Cations. 205 1-87 Gobbi L, see Diederich F (1999) 201 43-129... [Pg.233]

Luminescence lifetime spectroscopy. In addition to the nanosecond lifetime measurements that are now rather routine, lifetime measurements on a femtosecond time scale are being attained with the intensity correlation method (124), which is an indirect technique for investigating the dynamics of excited states in the time frame of the laser pulse itself. The sample is excited with two laser pulse trains of equal amplitude and frequencies nl and n2 and the time-integrated luminescence at the difference frequency (nl - n2 ) is measured as a function of the relative pulse delay. Hochstrasser (125) has measured inertial motions of rotating molecules in condensed phases on time scales shorter than the collision time, allowing insight into relaxation processes following molecular collisions. [Pg.16]

Markovitsi D, Talbot F, Gustavsson T, Onidas D, Lazzarotto E, Marguet S (2006) Molecular spectroscopy complexity of excited state dynamics in DNA. Nature 442 E7... [Pg.332]

Chou PT, Chen YC, Yu WS et al (2001) Spectroscopy and dynamics of excited-state intramolecular proton-transfer reaction in 5-hydroxyflavone. Chem Phys Lett 340 89-97... [Pg.262]

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Excitation Spectroscopy

Excited states spectroscopy

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