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Boron photochemistry:IX. Synthesis and fluorescent properties of dimesityl-phenylboranes

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
38
Issue
2
Identifiers
DOI: 10.1016/s0022-328x(00)83321-5
Disciplines
  • Physics

Abstract

Abstract A series of p-substituted phenyldimesitylboranes has been synthesized by reaction of dimesitylboron fluoride with appropriately substituted phenyllithium derivatives. The quantum yields of fluorescence in cyclohexane vary with the nature of the p-substituent as follows: Br≈Cl<CN<CH 3≈H<N(CH 3) 2<N(C 6H 5) 2. The wavelengths of fluorescent emission of a number of these compounds shift to longer wavelengths in polar solvents such as methanol. The sensitivity to solvent polarity is attributed to a change from a nonpolar ground state to a highly polar species in the excited state.

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