Synthesis of Substituted 2,3,5,6-Tetraarylbenzo[1,2-b:4,5-b']difurans
摘要:
A series of substituted 2,3,5,6-tetraarylbenzo[1,2-b:5,4-b']difurans 1 was synthesized. This synthesis is based upon the photocyclization of 2,5-dibenzoylresorcinol dibenzyl ethers to the corresponding tetrahydrobenzo[1,2-b:5,4-b']difurans. Treatment of the photoproducts with methanesulfonyl chloride in pyridine afforded 1 in overall yields ranging from 30-72%. A number of these compounds have high fluorescence quantum yields (phi(f) = 0.76-0.90), and their fluorescence spectra exhibit large solvatochromic shifts. These compounds may be suitable for use as fluorescent probes.
[EN] ULTRAVIOLET LIGHT STABILIZING COMPOUNDS AND ASSOCIATED MEDIA AND DEVICES<br/>[FR] COMPOSÉS DE STABILISATION AUX RAYONS ULTRAVIOLETS ET SUPPORTS ET DISPOSITIFS ASSOCIÉS
申请人:GENTEX CORP
公开号:WO2010036295A1
公开(公告)日:2010-04-01
An electrochromic device including a first substantially transparent substrate having an electrically conductive material associated therewith, a second substrate having an electrically conductive material associated therewith, and an electrochromic medium including at least one solvent, at least one anodic electroactive material, at least one cathodic electroactive material, wherein at least one of the anodic and cathodic electroactive materials is electrochromic, and one or more ultraviolet light stabilizing compounds including a substituted diaroyl or unsubstituted diaroyl resorcinol.