Synthesis and photochromic properties of phenanthropyran derivative substituted with styryl group
2005
The synthesis and the photochromic properties of new phenanthropyran derivative containing styryl substituent are described. The compound 8 showed two-step two-photon photochromism to produce a thermally stable cyclopentaannulated compound 10 through a thermally unstable open keto form intermediate 9.
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