The author of 《Self-assembled heterometallic complexes showing enhanced two-photon absorption and their distribution in living cells》 were Jiang, Qin; Yang, Xinda; Xiang, Pan; Dudek, Marta; Matczyszyn, Katarzyna; Samoc, Marek; Tian, Xiaohe; Zhang, Qiong; Luo, Yuhui; Wang, Daqi; Shi, Pengfei. And the article was published in New Journal of Chemistry in 2021. COA of Formula: C20H14N4 The author mentioned the following in the article:
Heterometallic binuclear Ru-Pt and trinuclear Zn-Pt complexes were prepared via self-assembly by attaching PtII-tpy (tpy = 2,2′:6′,2”-terpyridine) onto the RuII-tpy and ZnII-bis(tpy) moiety. The visible absorption bands for Ru-Pt complexes are primarily due to RuII → tpy MLCT transitions with some overlap from PtII → tpy MLCT, while no MLCT transition is observed for the Zn-Pt complex. The emission intensity of the Ru-Pt complexes was improved relative to the mononuclear RuII precursor; however, the emission of Zn-Pt was decreased when compared with strongly emissive ZnII-bis(tpy). Z-scan results revealed relatively high two-photon absorption (TPA) cross sections σ2, with maximal values of 962 GM for Ru-Pt and 200 GM for Zn-Pt. All the heterometallic complexes localize preferably into lysosomes by confocal fluorescence imaging results, which also showed improved cell-free 1O2 quantum yield compared to their mononuclear precursor. The experimental process involved the reaction of 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3COA of Formula: C20H14N4)
4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine(cas: 112881-51-3) belongs to pyridine derivatives. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals. COA of Formula: C20H14N4