I found the field of Chemistry; Engineering; Materials Science very interesting. Saw the article Multi-photon properties in various condensed phases of dendritic chromophores derived from carbazole and indenoquioxaline units: Synthesis and characterization published in 2019. Safety of 4,4′-Dibromobiphenyl, Reprint Addresses Lin, TC (corresponding author), Natl Cent Univ, Dept Chem, Photon Mat Res Lab, Taoyuan 32001, Taiwan.; Lin, HW (corresponding author), Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 30013, Taiwan.. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl
We have used functionalized carbazoles and indenoquonoxalines as the main building units and enthynyl groups as the pi-linkages to construct two novel dendritic fluorophores and studied their degenerate multi-photon absorption properties in both the solution phase and the neat-film state within femtosecond and nanosecond regions. In our experiments, these model compounds are found to manifest strong and widely dispersed two-photon absorption as well as effective power-limiting properties against ultra-short laser pulses in the near-IR region. In addition, both chromophores exhibit medium to strong three-photon-induced fluorescence, indicating such scaffold may serve as a reference structural motif for the development of three-photon materials.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem