Pseudo crystalline state thermochromic and reverse-photochromic reactivity of spiroindolinobenzopyran upon encapsulation into Zn-MOF-74†
Abstract
After inclusion into the rigid channels of Zn MOF-74 crystals, molecules of spiroindolinobenzopyran (SPH) turned thermochromic by converting to its red merocyanine form on heating and reverse-photochromic by converting to its yellow spiro form under UV irradiation at 365 nm. However, SPH did not show any chromic reactivity in its pure solid form.