Femtosecond dynamics of ground-state vibrational motion and energy flow: polymers of diacetylene

Vierheilig, A.; Chen, T; Waltner, P.; Kiefer, W.; Materny, Arnulf; Zewail, Ahmed H.

doi:10.1016/s0009-2614(99)00904-5

Cited by 57 publications

(34 citation statements)

References 22 publications

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“…In our experiment we have chosen the Raman resonance such that four modes having wavenumbers of approximately 960, 1,200, and 1,450/1,475 cm -1 are excited. These correspond to 4 (backbone bending), 3 (C-C stretching), and 2 / 2′ (C=C stretching + Fermi resonance with side group CH 2 scissors vibration), respectively (Vierheilig et al 1999). The broad band transient therefore yields the dynamics belonging to all four vibrational modes as a function of delay time τ 2 .…”

Section: Control Of Mode Dynamics In Polydiacetylenesmentioning

confidence: 97%

“…Through this, they were able to increase the selectivity of the probing of the wave packet motion. In the present contribution, we review some recent work on femtosecond time-resolved FWM spectroscopy (Schmitt et al 1997a(Schmitt et al , b, 1998Meyer et al 1997Meyer et al , 1998Meyer et al , 1999Rubner et al 1998;Chen et al 1999a, b, c;Siebert et al 1999Siebert et al , 2000Vierheilig et al 1999). We aim to point out the main advantages of this technique and to emphasize its capability for investigating ground state dynamics.…”

Section: Introductionmentioning

confidence: 97%

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Femtosecond time-resolved spectroscopy of elementary molecular dynamics

Kiefer

Materny

Schmitt

2002

Naturwissenschaften

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Femtosecond time-resolved coherent anti-Stokes Raman spectroscopy (CARS) is applied in order to prepare and monitor laser-induced vibrational coherences (wave packets) of different samples mainly in its electronic ground state but also in excited states. The time evolution of these wave packets gives information on the dynamics of molecular vibrations. In a first example the femtosecond (fs) CARS transients of iodine are investigated. By changing the relative delay between the applied laser pulses of this non-degenerated four-wave mixing technique, both the wavepacket motion on the electronically excited and the ground states can be detected as oscillations in the coherent anti-Stokes signal. Second we report on selective excitation of the vibrational modes in the electronic ground state of polymers of diacetylene by means of a femtosecond time-resolved CARS scheme. This selectivity is achieved by varying the phase shape (chirp) and the relative delay between the exciting laser pulses.

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Section: Control Of Mode Dynamics In Polydiacetylenesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 97%

Femtosecond time-resolved spectroscopy of elementary molecular dynamics

Kiefer

Materny

Schmitt

2002

Naturwissenschaften

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“…Femtosecond time-resolved CARS is a method for clarifying the origin of ultrafast dynamics associated with molecular motions in liquid [1] in the time domain since 1980s for some decades [2,3]. This technique has been widely used in different samples, such as polydiacetylene [4,5], porphyrin [6,7], toluene [8], methanol-water [9], flame [10][11][12], N 2 [13] and dipicolinic acid [14][15][16]. Recently, there have been some advances in femtosecond time-resolved CARS, such as single-shot [17], hybrid fs/ps [8,[18][19][20], single-beam [21][22][23], spectral focusing [24] and in situ heterodyne detection [25].…”

Section: Introductionmentioning

confidence: 99%

Molecular vibrational dynamics in ethanol studied by femtosecond CARS

Zhao

Zhang

et al. 2015

Optics Communications

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“…The ultrafast optical responses in PDAs have been intensively investigated by femtosecond time-resolved pump-probe spectroscopy and picosecond to femtosecond time-resolved Raman spectroscopy [2,6,10,11,[21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Optical Nonlinearity in Polydiacetylenes Studied by Sub-5-fs Laser

Kobayashi

Ikuta

2006

Molecular Crystals and Liquid Crystals

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Molecular vibration of several modes in blue-phase polydiacetylene-3-butoxycarbonylmethylurethane (PDA-3BCMU) was real-time observed by 5-fs pump-probe measurement. The contribution of the vibrational wavepackets in the ground state and in the excited state in the signal were separated by multichannel measurements The C=C stretching mode in the ground state starts to oscillate p-out-ofphase with the CC stretching mode. The structure of PDA-3BCMU in the geometrically relaxed state is not pure butatriene-type but more like acetylene-type. The frequencies of C=C and CC stretching modes there were determined by singular value decomposition method to be 1472 AE 6 cm À1 and 2092 AE 6 cm À1 , respectively. The double and triple bond stretching frequencies in the ground state which are 1463 AE 6 cm À1 and 2083 AE 6 cm À1 , respectively.

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Femtosecond dynamics of ground-state vibrational motion and energy flow: polymers of diacetylene

Cited by 57 publications

References 22 publications

Femtosecond time-resolved spectroscopy of elementary molecular dynamics

Femtosecond time-resolved spectroscopy of elementary molecular dynamics

Molecular vibrational dynamics in ethanol studied by femtosecond CARS

Ultrafast Optical Nonlinearity in Polydiacetylenes Studied by Sub-5-fs Laser

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