公开(公告)号：US20230097455A1

公开(公告)日：2023-03-30

申请号：US17795280

申请日：2021-01-27

Applicant: BASF SE

Inventor： Frank WUERTHNER ,  Magnus MAHL ,  Helmut REICHELT

IPC: C07D221/18 ,  C09K11/06 ,  C09D5/22

Abstract: The present invention relates to compounds of the formula (I), a process for its preparation and its use as fluorescent dye that absorbs light emitted from an irradiation source and emits light different from that of the irradiation source and having a wavelength in the range from 680 to 950 nm; in photovoltaic applications; or as semiconductor in organic electronic applications; as laser dye, in an ink for machine readability and/or security applications or for the laser-welding of plastics; or for brand protection or as marker for liquids. The compounds of formula (I) may have a high fluorescence quantum yield, a high molar extinction coefficient, a high solubility and stability in the application medium, good storage stability and/or good detectability even in very small amounts in the correspondingly marked liquids.