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Photodimerization of Anthracenes in the Solid State: New Results from Atomic Force Microscopy
Author(s) -
Kaupp Gerd
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199205951
Subject(s) - atomic force microscopy , anthracene , solid state , phase (matter) , chemistry , chemical physics , crystallography , materials science , nanotechnology , photochemistry , organic chemistry
The phase changes for topochemically allowed and forbidden photodimerizations of crystalline anthracene derivatives [Eq. (a)] become visible under the atomic force microscope. In all cases, surprisingly, the formation of surfaces resembling ice floes is observed, accompanied by considerable material transport. No processes with minimal atomic and molecular movement are seen. The new phase formation must therefore be included in the reaction description from the beginning. R = H, CH 3 , Cl, CN.