Hole-burning spectra

Time resolved hole burning spectra were measured by means of a femtosecond transient absorption spectrometer system. A second harmonics of a mode locked cw Nd + YAG laser (Quantronix, 82MHz) was used for a pumping source. A synchronously pumped rhodamine 6G dye laser with a saturable absorber dye jet (DODCl/DQOCI) and dispersion compensating prisms in the cavity was used. The output of the dye laser (lOOfs fwhm, 600pJ/pulse) was... 

Itoh s group and also Tramer, Piuzzi and their co-workers used this method extensively for the study of jet-cooled exciplexes. Examples of hole-burning spectra are shown in Figures 2 and 3. 

Figure 2. Characterization of intermolecular exci-plexes by hole-burning spectroscopy. Adapted from Ref. [22a] (a) Fluorescence excitation ( emission set at 375 nm) and (b) hole-burning spectra of the R-isomer of the anthracene-dimethylaniline (An-DMA) adduct in a supersonic jet. The probe laser was tuned on the most intense line of the adduct. Lines marked with asterisks are due to bare anthracene, (c) Fluorescence excitation ( emission set at 450 nm) and (d) hole-burning spectra of the E-isomer of the An- DMA adduct in a supersonic jet. The probe laser was tuned to the maximum of the broad exciplex excitation band.

Figure 3. Example of fluorescence excitation and hole-burning spectra of an intramolecular exciplex the fluorescence excitation spectrum ( emission sct at 395 nm, locally excited fluorescence) of 9-An-m-DMA (see Scheme 1 for structure) (b), along with two hole-burning spectra, (a) the probe laser set at 26644 cm and (c) the probe laser set at 26689 cm . The arrows in (a) indicate the bands used for the probe lasers. Adapted from Ref. [19b].

Figure 4. Hole-burning spectra of the anthracene-dimethyl-o-toluidine (An-DMOT) pair, demonstrating the existence of two R-isomers. The vibrational structures of the electronic transitions of the two isomers are dearly different. The probe laser was set at the origins of the two isomers, respectively, which are separated by 97 cm from each other the spectrum shown in (a) is red shifted from that of bare anthracene by 493 cm and that shown in (b) is shifted by 396 cm . Adapted from Ref. [22a],... 

Fig. 20 a Transient hole burning spectra of [Rh(bpy)3][NaAl1 xCrx(ox)3]C104 at 1.5 K for different values of x. b The observed linewidth as a function of x... 

Figure 4. Hole burning spectra of DMST in TMB at 3.3 K and 1 bar and at 2.5 kbar. (Adapted from Johnson and Trommsdorff [92].)...

As an example, a series of transient hole-burning spectra obtained with a chirp-compensated continuum probe with a light-harvesting protein is shown in figure B2.1.7 [112]. As the probe delay increases, the initially... 

Figure B2.1.7 Transient hole-burned spectra obtained at room temperature with a tetrapyrrole-containing light-harvesting protein subunit, the a subunit of C-phycocyanin. Top fluorescence and absorption spectra of the sample superimposed with the spectrum of the 80 fs pump pulses used in the experiment, which were obtained from an amplifled CPM dye laser operating at 620 mn. Bottom absorption-difference spectra obtained at a series of probe time delays.

The ion drift times through the quadrupole mass filter can also be determined in the hole-burning experiment. By taking the hole-burning spectra of the parent and fragment ions formed in electron impact ionization of the parent molecule, the corresponding arrival times (t) and masses (m) of these ions are used to fit the equation t = -t-1, where to is the... 

Tang, D., Jankowiak, R., Small, G. and Tiede, D. M. (1989) Structured hole burned spectra of the primary donor state absorption region of Rhodopseudomonas viridis Chem. Phys., 131, 99-113. 

Res of R.vi ridis and Rhodobacter spaeroides (R-26) were isolated as described earlier /ll/. Absorption, fluorescence and hole burned spectra at 1.7 K were measured with OMA-2 optical multichannel analyzer (EGSG, PARC, NJ) /10,11/. 

Dynamic hole-burning and selective relaxation measurements were made on the DMR line at seven temperatures between 19 and 160 K. Figure 8 presents some typical examples of hole-burning spectra at 18, 82, and 160 K. The experimental sequence consisted of an initial multiple pulse saturating train followed by a relaxation interval close to Tj. Then, in the cases... 

F. 10 IR UV hole burning spectra of guanine with (a-c) and without (d-f) water. Corresponding modes for conesptmding structures with and without water are indicated by dotted lines and color coding. Structures are schematic only. Asterisks denote peaks in b which also show up in a, probably caused by overlap in the probe spectra. Adapted from [76]... 

Mayorkas N, Izbitski S, Bemat A, Bar I (2012) Simultaneous ionization-detected stimulated raman and visible-visible-ultraviolet hole-burning spectra of two tryptamine conformers. J Phys Chem Lett 3 603-607... 

Lyle, P.A., Kolaczkowski, S.V., Small, G.J. Photochemical hole-burned spectra of protonated and deuterated reaction centers of Rhodobacter sphaeroides. J. Phys. Chem. 97, 6924-6933 (1993)... 

Figure 11-6. Hole burning spectra, burned and measured at 77 K, of Eu -doped glasses obtained by heating at 500° C, 800° C, 900° C, and 1000° C. Holes were burned at 17322 cm. ...

Fig. 40. Hole-burning spectra of thioindigo in benzoic acid crystal at 1.35 K. The scanning laser frequency w is measured with respect to the burning laser frequency cut> AcOb is detuning of the burning laser frequency relative to the center of absorption line.

Fig. 3. Bum wavelength dependence of the nonphotochemical hole burned spectra of Preparation A. From the top = 665.2,...

Fig. 2. Persistent hole burned spectra of PS II RC with Ag = 632 nm (trace 1) and A.g = 662 nm (trace 2). The satellite hole at 546 nm is due to the Q -state of Pheo a. Trace 3 is the non-line narrowed transient hole spectrum of P680 (A,g = 662 nm). Trace 4 is due to bleaching of Pheo a obtained with white light illumination in the presence of dithionite. All experiments performed at 4.2 K...

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