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. Author manuscript; available in PMC: 2020 Apr 3.
Published in final edited form as: J Am Chem Soc. 2019 Mar 14;141(13):5535–5543. doi: 10.1021/jacs.9b01368

Figure 5.

Figure 5.

(a) Schematic illustration for the tunable fluorescence controlled by increasing steric hindrance from metallacycles 4a to 4e based on the proposed molecular design. (b) DFT-optimized ground state structures of titled molecules with the recorded values for the bite angle (Θa), bending angle (Θb), and N-N distance (Å).