Real-time investigation of the photodissociation dynamics of p-chlorotoluene and p-dichlorobenzene

Direct observation of field-free alignment of asymmetric molecules in excited states

“…Accordingly, the lifetime 482 ± 10 ps reflects the decay of the vibronic excited S 1 state of this molecule pumped at 267 nm. Possible deexcitation mechanisms are suggested that the initially excited S 1 state is predissociative via the repulsive triplet state, which is in consistent with that on the basis of the laser-induced fluorescence (LIF) experiment [26] and previous investigations on p-dichlorobenzene [27].…”

Photochemistry of aryl halides: Photodissociation dynamics

“…Moreover, for the first time, they observe a novel quantum beat oscillation with 37.4 ps cycle in p-dichlorobenzene. Possible de-excitation mechanisms are suggested to be similar to that of o-dichlorobenzene, i.e., the initially excited S 1 state is predissociative via the repulsive triplet state [70].…”

“…Recently Wang and coworkers [70] have investigated that deexcited dynamics of p-chlorotoluene and p-dichlorobenzene by the femtosecond pump-probe method in a supersonic molecular beam. The lifetime constants of excited p-chlorotoluene and p-dichlorobenzene are determined to 150 and 122 ps, respectively.…”

“…Experimentally, the photodissociation dynamics of aryl halides have widely been studied in the gas phase by photofragment translational spectroscopy (PTS) [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65], in real time by ultrafast pump-probe spectroscopy combined with timeof-flight (TOF) [66][67][68][69][70][71], by time-resolved Fourier-transform spectroscopy [35,71,72], by resonance enhanced multiphoton ionization (REMPI) technique [73][74][75][76], and by multimass ion imaging techniques [36,48,49,[77][78][79][80]. Fox example, Bersohn and coworkers [50,51] were firstly to study the photodissociation dynamics of the aryl halides at 193 and 248 nm.…”

Self-assembled two-dimensional nanoporous molecular arrays and photoinduced polymerization of 4-bromo-4′-hydroxybiphenyl on Ag(111)

“…The photodissociation of alkyl-and aryl halides has been extensively studied in the gas phase by photofragment translational spectroscopy [16][17][18][19] and femtosecond time-resolved multiphoton ionization mass spectrometry. [20][21][22][23] Photoinduced reactions of C-X (X = Br, Cl) bond breaking have been used as a direct rout in forming single or molecular bilayers on the Si(111)-(7 × 7) surface. [24][25][26] In this work, we use high resolution STM combined with density functional theory (DFT) calculations to study self-assembled square-like structures of 4-bromo-4 ′ -hydroxybiphenyl on Ag(111) at room temperature.…”