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The Pentaphenylborole–2,6‐Lutidine Adduct: A System with Unusual Thermochromic and Photochromic Properties
Author(s) -
Ansorg Kay,
Braunschweig Holger,
Chiu ChingWen,
Engels Bernd,
Gamon Daniela,
Hügel Markus,
Kupfer Thomas,
Radacki Krzysztof
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201006234
Subject(s) - photochromism , thermochromism , adduct , irradiation , photochemistry , absorption (acoustics) , carbon fibers , chemistry , materials science , optics , organic chemistry , physics , nuclear physics , composite number , composite material
Changing color : The pentaphenylborole–2,6‐lutidine adduct 1 has unusual photophysical properties. Cooling a solution of 1 results in the disappearance of the absorption band at 578 nm and a color change from blue to yellow. Irradiation of 1 at low temperatures leads to a migration of lutidine from boron to the adjacent carbon with BC bond formation and a color change to green.