Molecular Switches

0 M

M

X X

λ1

	R3			R2 R1	λ2		R1 R3	R2
			Y					Y
			M-15					P-15
					X	Y
		R1	R2	R3
	15	H	OMe	NO2	S	S
	16	Me	OMe	H	CH2	S
	17	H	NO2	NMe2	S	S
	18	NMe2	NO2	H	S	S

M

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& &

M

			M
		M	&	2 X 11

Y

23

M M

& &

M M

J

M

M

60

50

∆ε	0

-50

-70 200 300 400 500

Wavelength[nm]

M

M

M

M

∆ absorbance x 103

1.5

1.0

0.5

0.0

-0.5

-1.0

CD spectrum of 26a

-1.5

300

400

500

600

700

∆ absorbance x 103

wavelength (nm)

6
4
2
0
-2
-4		CD spectrum of 26b
-6
300	400	500	600	700

wavelength (nm)