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. 2018 Apr 6;57(19):5310–5314. doi: 10.1002/anie.201712931

Figure 2.

Figure 2

Rotaxanes a) 5 (λ ex=435 nm), b) 6 (λ ex=380 nm), and c) 7 (λ ex=379 nm) and their fluorescence response to 5 equiv M(ClO4)2 (MeCN, 100 μm; blue bars). Red bars in (c) refer to the fluorescence response upon sequential addition of M2+ followed by Zn2+ (5 equiv each). R=CH2C(H)Ph2, R′=3,5‐di‐tBu‐C6H3.