0.004
CH
3 dmso
"HBF
4 "
Na
2 CO
3
"HBF
4 "
Na
2 CO
3
CH
3 dmso
Pt
, BF
4
-
, 2BF
4
-
(M)-(-)-69
P
M
(M)-(-)-68
i
)
(M)-(-)-[69,H
+
][BF
4
-
]
(M)-(-)-[68,2H
+
][2BF
4
-
]
Pt
H
H
H
N
N
+
N
+
N
+
N
N
N
N
0.002
0.000
–0.002
–0.004
Ω g
lumΩ
= 3
× 10 –3
160 nm shift
CPL (fluor.)
Ω g
lumΩ
= 1
× 10 –3
to 1
× 10 –3
CPL (phos.)
1.0
0.8
0.6
0.4
0.2
0.0
420 520 620 720
Wavelength (nm)
68 / [68,2H +
]
ΔI
Intensity(arb. units)
0.0015
0.0010
0.0005
0.0000
ΔI
–0.0005
–0.0010
–0.0015
P
M
1.0
0.8
0.6
0.4
0.2
0.0
540 620 700
Wavelength (nm)
69 / [69,H +
]
Intensity(arb. units)
Fig. 4.27
Synthesis of cycloplatinated helicene (M )-69 from (M )-68 and reversible protonation and deprotonation process of organic and organometallic
systems, observed by emission and CPL spectroscopies. (i) Pt(dmso)
2 (CH
3 )
2 , acetone, 50
C, 5 h, 90%. Variation of emission and CPL responses upon
protonation [67]
4 Circularly Polarized Luminescence in Helicene and Helicenoid Derivatives
85
CH
3 dmso
"HBF
4 "
Na
2 CO
3
"HBF
4 "
Na
2 CO
3
CH
3 dmso
Pt
, BF
4
-
, 2BF
4
-
(M)-(-)-69
P
M
(M)-(-)-68
i
)
(M)-(-)-[69,H
+
][BF
4
-
]
(M)-(-)-[68,2H
+
][2BF
4
-
]
Pt
H
H
H
N
N
+
N
+
N
+
N
N
N
N
0.002
0.000
–0.002
–0.004
Ω g
lumΩ
= 3
× 10 –3
160 nm shift
CPL (fluor.)
Ω g
lumΩ
= 1
× 10 –3
to 1
× 10 –3
CPL (phos.)
1.0
0.8
0.6
0.4
0.2
0.0
420 520 620 720
Wavelength (nm)
68 / [68,2H +
]
ΔI
Intensity(arb. units)
0.0015
0.0010
0.0005
0.0000
ΔI
–0.0005
–0.0010
–0.0015
P
M
1.0
0.8
0.6
0.4
0.2
0.0
540 620 700
Wavelength (nm)
69 / [69,H +
]
Intensity(arb. units)
Fig. 4.27
Synthesis of cycloplatinated helicene (M )-69 from (M )-68 and reversible protonation and deprotonation process of organic and organometallic
systems, observed by emission and CPL spectroscopies. (i) Pt(dmso)
2 (CH
3 )
2 , acetone, 50
C, 5 h, 90%. Variation of emission and CPL responses upon
protonation [67]
4 Circularly Polarized Luminescence in Helicene and Helicenoid Derivatives
85