Molecular Switches

4
4	M
M
	M
4
M	M
	M
M
M	M
M
	M
	M
M
M	M
M
M	M
M
	M
	M
M
	M
M
M
	M
M
	M
M
	M
	M
M	M
M	M
	M
M
	M

M
	M
M
M	M
M	M

F V

E

	$ $

M

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M

M

				M M		M
					M M
			M		M M	M M
				M M
					M	M M
				M M		M M
					M M
				M M	M	M M

M

M 0 M

M

	0.05
	0
	∆ε (E-4) -0.05
	-0.10
								M
								0 M M
	-0.15
	0		1	2	3	4	5
			Irradiation cycles (313 nm)

0M