Novel fluorescent quater‐ and quinquifurans: Syntheses and photophysical properties
作者:Joel M. Kauffman、Guillermo Moyna
DOI:10.1002/jhet.5570390519
日期:2002.9
In the quest for fast fluors for use in waveshifting polystyrene fibers, symmetrical oligofurans were investigated. Furan moieties were coupled by means of the Ullmann Reaction or by palladium-catalyzed unsym-metrical coupling; the latter gave higher yields. While the benzoxazole-terminated quater- and quinquifurans we prepared were both stable and fast, exhibiting a green fluorescence and decay times
为了寻求用于波移聚苯乙烯纤维的快速氟,对对称的低聚呋喃进行了研究。呋喃部分通过Ullmann反应或通过钯催化的非对称偶联而偶联。后者的产量更高。虽然我们制备的苯并恶唑封端的季铵盐和喹啉呋喃既稳定又快速,表现出绿色荧光,衰变时间约为2.4纳秒,但当掺入聚苯乙烯时,它们在溶解度和发射强度方面不如其他类型的荧光。