Pair-states in α-perylene crystal. A theoretical study

Theoretical Investigation of Perylene Dimers and Excimers and Their Signatures in X-Ray Diffraction

“…These cannot be explained by a single excited electronic state, as suggested in earlier studies. 21 Our results agree, essentially, with the results obtained from recent laser spectroscopy studies, 39 despite the fact that our calculations are based on a model system consisting of just five perylene pairs. c. Influence of the Structure Changes on the X-Ray Diffraction Signal.…”

Phonon Dispersion in an α‐Perylene d12‐Crystal at 10 K

“…The cooling of the sample demands special attention because of the strong anisotropy of the thermal expansion coefficients [8], the mechanical weakness, and the large size of the sample. Cooling and heating of the crystal were performed with a rate of about 10 K/h.…”

Self-aggregates formation of 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes in Langmuir–Blodgett films

“…Meanwhile, the fluorescence spectrum loses the structured form already at MFE0.015 and the shift of the maximum position at this concentration compared to that of monomer is E30 nm (at MF ¼ 0.8 the shift is 460 nm). The shape and the maximum position of the fluorescence band, which has no equivalent band in the absorption spectrum, could be indicative that we deal here with Y-type emission [15,16,[32][33][34] originates from the precursor for the fully relaxed excimer.…”

“…Willig et al [20,22] made the detailed analysis of the temperature effect on the fluorescence and its lifetime for the LB film of one of perylene derivatives mixed with arachid acid. They ascribed the bands appearing in the fluorescence spectrum with maxima at about 550 and 630 nm (at 2 K) to, respectively, Y-type and E-type emissions, which are characteristic also for a-perylene crystal [32][33][34]. Y-type emission originates from a partially relaxed excited molecular pair, while E-type emission is related to the fully relaxed excimer.…”