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. Author manuscript; available in PMC: 2020 Apr 15.
Published in final edited form as: Coord Chem Rev. 2019 Jan 28;385:1–19. doi: 10.1016/j.ccr.2019.01.005

Fig. 3.

Fig. 3.

The formation of second-generation modular Sierpiński triangle using modular strategy and step-wise synthesis. Figure was reproduced from Ref. [88] with permission of the copyright holders.