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Cover Picture: Single Dibenzoterrylene Molecules in an Anthracene Crystal: Spectroscopy and Photophysics (ChemPhysChem 8/2007)
Author(s) -
Nicolet Aurélien A. L.,
Hofmann Clemens,
Kol'chenko Mikhail A.,
Kozankiewicz Boleslaw,
Orrit Michel
Publication year - 2007
Publication title -
chemphyschem
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200790021
Subject(s) - anthracene , sublimation (psychology) , fluorescence , excited state , chemistry , spectroscopy , crystal (programming language) , photochemistry , molecule , materials science , optics , atomic physics , physics , organic chemistry , quantum mechanics , psychology , computer science , psychotherapist , programming language
The cover picture shows a sublimation‐grown anthracene crystal doped with dibenzoterrylene. The deep blue color is the anthracene crystal's intrinsic fluorescence, excited by a mercury line at 365 nm. The red color arises from scattered near‐infrared (785 nm) laser light used to excite dibenzoterrylene. Fluorescence exits the crystal dominantly through the edges, defects and cracks. The bottom of the figure presents a high‐resolution broad‐band fluorescence excitation spectrum of the sample at low temperature around 785 nm. Every sharp line marks the zero‐phonon transition of a single dibenzoterrylene molecule. The group of lines at 12 590 cm −1 is one of the two spectroscopic sites (the “red site”) whose photophysics are studied in the Article by Nicolet et al. on page 1215.