Synthesis of thienyl‐containing photochromes (dithienylethenes, fulgides, fulgimides, and spirocompounds)

Abstract

Abstract© 2007 Wiley Periodicals, Inc. Heteroatom Chem 18:557–567, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20334

Reversible Photoinduced Luminescence Modulation from Nanospheres Containing CdSe/ZnS Quantum Dots and Photochromic Diarylethene

“…1-Dodecanethiol, triethylamine, and poly­(maleic anhydride- alt -1-tetradecene) were purchased from Sigma-Aldrich. 4-{[(1 Z )-{4-[2-(5-Chloro-2-methylthiophen-3-yl)­cyclopent-1-en-1-yl]-5-methylthiophen-2-yl}­methylidene]­amino} benzenethiol (DAE1) diarylethene was synthesized according to the previously published procedures. , Chemical structures of the open and cyclic forms as a result of photochromic transformation are presented in Figure .…”

Novel Dithienylethenes with Extended π‐Systems: Synthesis by Aldol Condensation and Photochromic Properties

“…The combined organic phases were washed with satd. NaHCO 3 solution (40 mL) and dried with MgSO 4 . After evaporation of all volatile components in vacuo 10 was obtained as a yellow crystalline solid; yield 1.420 g (10.13 mmol, 98 %) (compound 10 was identified by 1 H NMR spectroscopy, by comparison with data from the literature [9] …”

“…Because of their high fatigue resistance and thermal stability this class of photoswitches is the target of increased interest for applications in fields of optical data storage and photoswitchable devices. [1][2][3][4] A large percentage of known dithienylethenes can only be switched by UV light. In an earlier publication we showed how to achieve a successive shift of the absorption bands of different dithienylethenes to the visible region of the electromagnetic spectrum by elongation of the conjugated π-system by using Wittig-type reactions.…”

Light-sensitive heterocyclic compounds for information nanotechnologies

“…Fulgimides (XVI) [26][27][28][29][30][31][32][33] As for dihetarylethenes, our study of the kinetics of thermal relaxation of the photoinduced cyclic form В to the initial open form А showed that both forms are thermally stable for at least one month when their solutions are stored in the dark in tightly plugged vessels. The spectralkinetic characteristics for the studied fulgimides are summarized in Table 3.…”