Fig. S4 UV-vis spectral changes of P2 in CHCl3 upon the addition of (a) Fe3+, (b) Sn2+, (c) Fe2+, and (d) Ag+ ions, followed by triethylamine (TEA) at 20 oC.
Fig. S5 UV-vis-near IR spectral changes of P3 in CHCl3 upon the addition of (a) Fe3+, (b) Cu2+, (c) Ti4+, and (d) Sc3+ ions, followed by triethylamine (TEA) at 20 oC.
5. X-ray crystallography Fig. S6 (a) Crystal structure of the Ag+ complex with 5 and (b) magnified coordination structures of Ag(1) and Ag(2) to the cyano groups of 5. Hydrogen atoms and counter anions (OTf) are omitted for clarity.
[Fe3+]/[1] Fig. S8 UV-vis spectral changes of 1 (40.5 μM) in CHCl3 upon the addition of Fe3+ ion (0-6 equiv.). A cuvette with a light-path length of 1 cm was used. ΔAbs was monitored at 469 nm.
400 600 800
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Wavelength (nm)
Abs
orba
nce
0.0 0.5 1.0 1.5 2.0 2.50.00
0.04
0.08
0.12
0.16
[Sn2+]/[1]
ΔAbs
Fig. S9 UV-vis spectral changes of 1 (40.5 μM) in CHCl3 upon the addition of Sn2+ ion (0-2 equiv.). A cuvette with a light-path length of 1 cm was used. ΔAbs was monitored at 469 nm.
400 600 800
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Abs
orba
nce
Wavelength (nm)
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.50.00
0.05
0.10
0.15
0.20
0.25
0.30
0.35
[Fe2+]/[1]
ΔAbs
Fig. S10 UV-vis spectral changes of 1 (314 μM) in CHCl3 upon the addition of Fe2+ ion (0-3 equiv.). A cuvette with a light-path length of 1 mm was used. ΔAbs was monitored at 469 nm.
Fig. S11 Job plot analysis of 2 with (a) Fe3+, (b) Cu2+, (c) Sc3+, (d) and Ti4+ ions in CHCl3. The total concentration of 2 and metal ions is 60 μM.
400 600 800 1000
0.0
0.2
0.4
0.6
0.8
1.0
Abs
orba
nce
Wavelength (nm)
0 1 2 3 40.0
0.1
0.2
0.3
0.4
0.5
0.6
[Fe3+]/[2]
ΔAbs
Fig. S12 UV-vis-near IR spectral changes of 2 (30.0 μM) in CHCl3 upon the addition of Fe3+ ion (0-4 equiv.). A cuvette with a light-path length of 1 cm was used. ΔAbs was monitored at 698 nm.
Fig. S13 UV-vis-near IR spectral changes of 2 (35.0 μM) in CHCl3 upon the addition of Cu2+ ion (0-4 equiv.). A cuvette with a light-path length of 1 mm was used. ΔAbs was monitored at 698 nm.
400 600 800 1000
0.0
0.2
0.4
0.6
0.8
1.0
Abs
orba
nce
Wavelength (nm)0 1 2 3 4 5 6
0.0
0.1
0.2
0.3
0.4
0.5
[Sc3+]/[2]
ΔAbs
Fig. S14 UV-vis-near IR spectral changes of 2 (33.3 μM) in CHCl3 upon the addition of Sc3+ ion (0-5 equiv.). A cuvette with a light-path length of 1 cm was used. ΔAbs was monitored at 698 nm.
400 600 800 1000
0.0
0.2
0.4
0.6
0.8
1.0
Abs
orba
nce
Wavelength (nm)0 1 2 3 4 5
0.0
0.1
0.2
0.3
0.4
0.5
[Ti4+]/[2]
ΔAbs
Fig. S15 UV-vis-near IR spectral changes of 2 (33.3 μM) in CHCl3 upon the addition of Ti4+ ion (0-5 equiv.). A cuvette with a light-path length of 1 cm was used. ΔAbs was monitored at 698 nm.
Fig. S16 UV-vis spectral changes of 1 (314 μM) in CHCl3 upon the addition of Ag+ ion (0-2 equiv.). A cuvette with a light-path length of 1 mm was used. ΔAbs was monitored at 469 nm.
400 600 800 1000
0.0
0.2
0.4
0.6
0.8
Abs
orbe
nce
(a.u
.)
Wavelength (nm)
Fig. S17 UV-vis-near IR spectral changes of 2 (33.3 μM) in CHCl3 upon the addition of Ag+ ion (0-10 equiv.). A cuvette with a light-path length of 1 mm was used.
Fig. S21 UV-vis spectral change of P2 in CHCl3 (a) upon the addition of Ag+ ion (0-2 equiv.) followed by addition of Fe3+ ion (0-1 equiv.) and (b) upon the addition of Fe3+ ion (0-1 equiv.) followed by the addition of Ag+ ion (0-2 equiv.).
400 600 800 1000 12000.0
0.2
0.4
0.6
0.8
1.0
1.2
Abs
orba
nce
Wavelength (nm)
P3 P3+0.50Ag+
P3+1.00Ag+
P3+1.50Ag+
P3+1.50Ag++0.25Fe3+
P3+1.50Ag++0.50Fe3+
P3+1.50Ag++0.75Fe3+
P3+1.50Ag++1.00Fe3+
P3+1.50Ag++1.25Fe3+
P3+1.50Ag++1.50Fe3+
(a)
400 600 800 1000 12000.0
0.2
0.4
0.6
0.8
1.0
1.2
Abs
orba
nce
Wavelength (nm)
P3 P3+0.25Fe3+
P3+0.50Fe3+
P3+0.75Fe3+
P3+1.00Fe3+
P3+1.25Fe3+
P3+1.50Fe3+
P3+1.50Fe3++0.50Ag+
P3+1.50Fe3++1.00Ag+
P3+1.50Fe3++1.50Ag+
(b)
Fig. S22 UV-vis spectral change of P3 in CHCl3 (a) upon the addition of Ag+ ion (0-1.5 equiv.) followed by the addition of Fe3+ ion (0-1.5 equiv.) and (b) upon the addition of Fe3+ ion (0-1.5 equiv.) followed by the addition of Ag+ ion (0-1.5 equiv.).
