Ultrafast photoinduced processes in indole–water clusters

Lippert, H.; Stert, V.; Hesse, L.; Schulz, Claus-Peter; Hertel, I. V.; Radloff, W.

doi:10.1016/s0009-2614(03)00921-7

Cited by 28 publications

(35 citation statements)

References 12 publications

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“…Experimental evidence for this dark state has been found by Zwier and co-workers using excited-state fluorescence-dip infrared spectroscopy. 5 Very recently we have studied the photochemical processes in indole-ammonia 6,7 and indole-water clusters 8 in pumpprobe experiments with fs laser pulses. 4 For indoleÁ(NH 3 ) n complexes it is assumed that a population of the dark state should lead to an intracluster hydrogen atom transfer from the N-H group of the indole molecule to the surrounding (NH 3 ) n moiety.…”

Section: Introductionmentioning

confidence: 99%

Photoinduced hydrogen transfer reaction dynamics in indole–ammonia clusters at different excitation energies

Lippert

Stert

Schulz

et al. 2004

Phys. Chem. Chem. Phys.

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The dynamics of the H atom transfer reaction in indoleÁ(NH 3 ) n clusters has been studied in femtosecond pump-probe experiments as a function of the pump wavelength (250-282 nm), i.e. for different vibrational excess energies in the excited electronic states. Typical changes of the corresponding time constants in the sub-ps and ps time region were observed for the small clusters sizes (n ¼ 1-3) and compared with those for the larger clusters (n ¼ 4-6). For the heterodimer indoleÁ(NH 3 ) 1 the energetic threshold of the reaction has been found at excitation energies of about 4.4 eV. In the sub-ps region we observed no isotope effect for all pump wavelengths used while on the ps time scale the rates for the deuterated clusters d-indoleÁ(ND 3 ) n are smaller by a factor up to 4 in comparison to the nondeuterated complexes. R E S E A R C H P A P E R 2718P h y s . C h e m . C h e m . P h y s . , 2 0 0 4 , 6 , 2 7 1 8 -2 7 2 4

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Section: Introductionmentioning

confidence: 99%

Photoinduced hydrogen transfer reaction dynamics in indole–ammonia clusters at different excitation energies

Lippert

Stert

Schulz

et al. 2004

Phys. Chem. Chem. Phys.

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“…This is consistent with a small probability expected for a transition of a bound state to the continuum wavefunction, which leads to a highly inefficient direct fragmentation of the cluster in the electronic ground state by the absorption of a single photon at the wavelength of the alignment laser. In addition, while electronically excited states of indole-water could break the cluster by a charge transfer in the A (πσ * ) state [7], the three-photon-transition probability to populate these states by the alignment laser is very small [49]. Moreover, the laser-induced Stark effect, which is on the order of a few meV for the alignment laser intensity, is not relevant for breaking the intermolecular hydrogen bond in the cluster, which is bound by 0.2 eV.…”

Section: Discussionmentioning

confidence: 99%

Communication: Strong laser alignment of solvent-solute aggregates in the gas-phase

Trippel

Wiese

Mullins

et al. 2018

The Journal of Chemical Physics

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Strong quasi-adiabatic laser alignment of the indole-water-dimer clusters, an amino-acid chromophore bound to a single water molecule through a hydrogen bond, was experimentally realized. The alignment was visualized through ion and electron imaging following strong-field ionization. Molecular-frame photoelectron angular distributions showed a clear suppression of the electron yield in the plane of the ionizing laser's polarization, which was analyzed as strong alignment of the molecular cluster with ⟨cos θ⟩ ≥ 0.9.

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“…The second 800-nm femtosecond probe pulse transfers part of the S 1 {m} population to higher lying electronic states S n . As S n states are likely to ionize [14,15] (autoionization yield: 0.2), the population of S 1 and thus fluorescence to the ground state are irreversibly depleted. To discriminate among different fluorescing molecules using ODD, the DUV pump pulse is optimally shaped so that fluorescence depletion is maximized or minimized for one molecule and not for the others.…”

Section: Optimal Pump-probe Fluorescence Depletion Experimentsmentioning

confidence: 99%

Discriminability of tryptophan containing dipeptides using quantum control

et al. 2013

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We show that the coherent manipulation of molecular wavepackets in the excited states of trp-containing dipeptides allows efficient discrimination among them. Optimal dynamic discrimination fails, however, for some dipeptide couples. When considering the limited spectral resources at play (3 nm bandwidth at 266 nm), we discuss the concept of discriminability, which appears uncorrelated to both static spectra and relaxation lifetime

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Ultrafast photoinduced processes in indole–water clusters

Cited by 28 publications

References 12 publications

Photoinduced hydrogen transfer reaction dynamics in indole–ammonia clusters at different excitation energies

Photoinduced hydrogen transfer reaction dynamics in indole–ammonia clusters at different excitation energies

Communication: Strong laser alignment of solvent-solute aggregates in the gas-phase

Discriminability of tryptophan containing dipeptides using quantum control

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