Abstract: The present invention relates to a compound of formula (I) based on a structure including functionalized spirofluorene and fused aromatics or non-aromatic rings with at least one heteroatom, and used as hole transporting material in a optoelectronic and/or photoelectrochemical device.

Abstract: The present invention relates to a compound of formula (I) based on a structure including functionalized spirofluorene and fused aromatics or non-aromatic rings with at least one heteroatom, and used as hole transporting material in a optoelectronic and/or photoelectrochemical device.

Abstract: An organic photochromic material suitable for use as a molecular switch is provided. It comprises a substituted diarylethene that exhibits both reversible photochromic behavior and nondestructive readout is provided. In a preferred embodiment, the diarylethene comprises conjugated substituents groups that produce fluorescence in the open-ring form of the isomer, but substantially no fluorescence in the closed-ring form of the isomer. In one embodiment, the diarylethene comprises 1,2-Bis-(2-(2-benzothiazolyl)-benzo[b]thien-3-yl)perfluorocyclopentene; 1,2-Bis-(2,5-bis-(2-benzothiazolyl)-thien-3-yl)perfluorocyclopentene; or a combination thereof. The molecular switch compound is useful as memory media, for example, 3-D memory media. In one embodiment, the molecular switch compound is dispersed in a UV-transparent polymeric matrix.