Novel bridged phthalein dyes substituted with a diisopropylamide ortho to the bridge are stable at high pH; with a chromogenically active auxochrome ortho to the meso carbon, a hypsochromic shift, band narrowing, and an increased molar absorptivity of the near-infrared absorbance are observed relative to the regioisomer in which the chromogenically active auxochrome is para.
用
二异丙基酰胺正交取代桥接的新型桥接
酞菁染料在高 pH 值条件下非常稳定;与色原活性辅助色素为对位的区域异构体相比,在色原活性辅助色素正交于中碳的情况下,可观察到低色移、色带变窄以及近红外吸收摩尔吸收率增加。