Time-Resolved Electronic Spectroscopy To Examine Shock-Wave-Induced Changes in Anthracene Single Crystals

Abstract

Shock-wave-induced electronic structure changes in anthracene single crystals were examined using timeresolved absorption and fluorescence spectroscopy. Crystals were subjected to stepwise loading normal to the (001) crystallographic plane to peak stresses between 2.5 and 6.0 GPa. Absorption experiments revealed (i) a monotonic shift of the absorption edge of the singlet state toward lower energies (red shift) and (ii) formation of a new band on the lower energy side of the red-shifted absorption edge. Furthermore, laser excitation to the new absorption band produced fluorescence with excimer-like characteristics. The combined absorption and fluorescence results indicate the formation of new electronic states as a consequence of shockwave compression and the resulting plastic deformation. The new states are attributed to dimer-type defects formed in shocked anthracene crystals.

High-Pressure Effects on the Electronic Structure of Anthracene Single Crystals: Role of Nonhydrostaticity

“…Therefore, in studies of molecular crystals under high pressure, some of the observed effects might not be related to pressure, but rather to stress deviators, and, consequently, to crystal deformation. Also, studies under intentionally introduced nonhydrostaticity, as was done here, can provide further insight into processes occurring under shock compression where nonhydrostatic conditions are the norm …”

“…Also, studies under intentionally introduced nonhydrostaticity, as was done here, can provide further insight into processes occurring under shock compression where nonhydrostatic conditions are the norm. 39…”

Tetracene-Doped Anthracene Nanowire Arrays: Preparation and Doping Effects

“…Anthracene bulk crystals and/or thin films have been a long-time subject of the solid-state studies. The structure−property relationship has been well-established. − It was reported that the optical and electronic properties of anthracene solids depend on a number of factors, such as the ordering of molecular arrangement, the structural defects, the existence of trace impurity and/or doped guest molecules, and the dimension of anthracene solids. − Fabrication of one-dimensional nanostructures such as nanowires is of great implications in the applications of optoelectronic nanodevices. , However, as compared to the extensive studies of anthracene bulk crystals and/or thin films, − the investigations of linear anthracene nanostructures are very rare. Liu et al synthesized anthracene nanowires through solid-phase reaction and found that they display fluorescence properties significantly different from those of anthracene bulk crystals.…”

Radially oriented anthracene nanowire arrays: preparation, growth mechanism, and optical fluorescence

“…39,40 Fabrication of one-dimensional (1D) nanostructures such as nanowires is of great implications in the applications of optoelectronic nanodevices. 41,42 However, compared to the extensive studies of anthracene bulk crystals and/or thin films, [43][44][45] the investigations of anthracene nanowires are exceptionally rare. Liu et al 40 recently reported the fabrication of anthracene nanowires through solid-phase reaction.…”