Open AccessShort Note
1,3-Bis(pyren-1-yl)imidazolium chloride (IPyr·HCl)
Received: 14 April 2011 / Accepted: 10 June 2011 / Published: 17 June 2011
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A novel UV-A-light absorbing N-heterocyclic carbene precursor imidazolium salt 2 was synthesized by reaction of 1,4-bis(pyren-1-yl)-1,4-diazadiene 1 with paraformaldehyde in the presence of chlorotrimethylsilane. The title compound was characterized by 1H-NMR, 13C-NMR, 2D-NMR, mass spectrometry, IR and UV/VIS spectroscopy.