The present invention provides a novel category of naphthalene-based two-photon fluorescent probes having a general formula I, wherein: X is selected from the X1, X2, X3 and X4; The mentioned two-photon fluorescent probes have a low fluorescence background in the non-tumor cells and tissues, and have a strong and specific fluorescent signal in the tumor cells and tissues. These probes have a certain level of water-solubility, while having good membrane permeability. In addition, they have a bigger effective two-photon absorption cross section. The compounds of the present invention also have a lower biotoxicity, phototoxicity and photobleaching. There is sufficient difference between the spectral range thereof and that of a biological sample.
本发明提供了一类新型的
萘基双光子荧光探针,其通式为I,其中:所述双光子荧光探针在非肿瘤细胞和组织中具有较低的荧光背景,在肿瘤细胞和组织中具有较强的特异性荧光信号。这些探针具有一定的
水溶性,同时具有良好的膜渗透性。此外,它们还具有较大的有效双光子吸收截面。本发明的化合物还具有较低的
生物毒性、光毒性和光漂白性。本发明化合物的光谱范围与
生物样本的光谱范围有足够的差异。