作者:Jin Li、Mengmeng Zhang、Lu Yang、Yubing Han、Xiao Luo、Xuhong Qian、Youjun Yang
DOI:10.1016/j.cclet.2021.04.041
日期:2021.12
Novel xanthenoid dyes by replacing the central oxygen atom of the xanthene dyes with less electron-rich bridging groups have been intensively sought after primarily for their long spectral wavelengths. However, the new scaffolds are likely prone to nucleophilic attack at their central methine carbon, as the result of the reduced electron density of the fluorochromic scaffolds. We envisage that the
主要由于长光谱波长,人们一直在强烈地寻求通过用较少的富含电子的桥连基团代替the吨染料的中心氧原子的新型类黄酮染料。然而,由于荧光变色支架的电子密度降低,新的支架可能易于在其中心次甲基碳上发生亲核攻击。我们设想桥接基团可用于从进入的亲核试剂上空间屏蔽中心次甲基碳,并提供高稳定性和合成的x吨-x吨染料。另外,可以通过亲电子芳族取代来修饰黄嘌呤桥连基团以引入官能团,例如磺酸酯基团。