Add time:09/04/2019         Source:sciencedirect.com

Two novel multibranched dyes curcumin-based: 1,7-bis(4′-propyloxy-3′-methyloxy-phenyl)-3-propyloxy-5-carbonyl-1,6-heptadiene (dye 1) and 1,7-bis(4′-acetate ethyloxy-3′-methyloxy-phenyl)-1,6-heptadiene-4,4-diacetate ethyl-3,5-dione (dye 2) were easily prepared. Their one- and two-photon absorption properties have been investigated carefully. The two-photon absorption (TPA) cross sections measured by two-photon excited fluorescence (TPEF) were determined to be 1143 and 842 GM for dye 1 and dye 2, respectively. Cell viability tests revealed the as-prepared compounds possessed low cytotoxicity against MCF-7 cell lines over a period of at least 24 h. In addition, in vitro and in vivo studies demonstrated the dye 1 could enter into tumor cells, and even rapid accumulate in tumor tissues, which makes it an ideal organic material for biomedical imaging.

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