1033754-72-1Relevant academic research and scientific papers
Synthesis and characterization of light-driven dithienylcyclopentene switches with axial chirality
Li, Yannian,Urbas, Augustine,Li, Quan
, p. 7148 - 7156 (2011)
Three new photochemically reversible but thermally stable dithienylcyclopentene switches with axial chirality were synthesized and characterized. All the compounds exhibited photochemically reversible isomerization with thermal stability between its open form and closed form in both organic solvent and liquid crystal host. Their photoresponsive behaviors in organic solvents were characterized by 1H NMR, UV-vis, and CD spectra. These chiral molecular switches were found not only to be able to act as a chiral dopant and induce a helical superstructure in an achiral liquid crystal host but also to be able to reversibly and dynamically tune the transmittance and reflection of the resulting chiral phase upon light irradiation. The helical twisting powers, transmittance, and reflection spectra of photoswitchable cholesteric LCs were measured. Dopant 1 exhibited an unusually high helical twisting power, which is significantly larger than those of the known chiral diarylethenes reported as chiral dopants so far.
Optic and proton dual-control of the fluorescence of Rhodamine based on photochromic diarylethene: mimicking the performance of an integrated logic gate
Zheng, Haiyan,Zhou, Weidong,Yuan, Mingjian,Yin, Xiaodong,Zuo, Zicheng,Ouyang, Canbin,Liu, Huibiao,Li, Yuliang,Zhu, Daoben
, p. 1588 - 1592 (2009)
A proton and optic dual-responsive fluorescence switch dyad which contains Rhodamine and photochromic diarylethene has been designed and an integrated logic circuit at the molecular level has been proposed.
Synthesis and spectroscopic properties of photochromic dithienylethene-functionalized subphthalocyanine conjugate
Shi, Maohu,Chen, Jingzhi,Shen, Zhen
, p. 1082 - 1089 (2016/12/14)
A subphthalocyanine-dithienylethene dyad has been synthesized and characterized by 1H-, 13C-NMR, HR-MS, UV-visible and emission spectroscopy. The results show that photoinduced isomerization of dithienylethene moiety from close-form to opened form can be achieved under visible light using subphthalocyanine as a light-harvesting unit and the fluorescence properties of subphthalocyanine could be modulated by the isomerization state of the dithienylethene moiety.
Exploiting protein symmetry to design light-controllable enzyme inhibitors
Reisinger, Bernd,Kuzmanovic, Natascha,Loeffler, Patrick,Merkl, Rainer,Koenig, Burkhard,Sterner, Reinhard
supporting information, p. 595 - 598 (2014/01/23)
The activity of the metabolic branch-point enzyme PriA from Mycobacterium tuberculosis (mtPriA) can be controlled reversibly by light. Two-pronged inhibitors based on the dithienylethene scaffold were designed utilizing mtPriA's natural rotational symmetr
Synthesis and characterization of thermally irreversible photochromic cholesteric liquid crystals
Rameshbabu, Krishnamurthy,Urbas, Augustine,Li, Quan
, p. 3409 - 3415 (2011/06/21)
Three thermally irreversible photochromic chiral liquid crystal dithienylcyclopentenes were found not only to be able to self-organize into a phototunable helical superstructure, i.e., cholesteric phase, but also to be able to induce a photoresponsive helical superstructure in an achiral liquid crystal host. The cholesteric phase in the three chiral compounds went into a glassy phase without crystallization upon cooling. All the materials exhibited reversible photochromism with thermal stability in both solution and thin film, and their fluorescence was shifted to longer wavelength upon UV irradiation while the shifted fluorescence was recovered upon visible light irradiation. The enhanced fluorescence emission with the addition of fluoride anions was observed, and its reverse process happened with the addition of an equivalent proton. ? 2011 American Chemical Society.
Photoresponsive dithienylethene-urea-based organogels with "reversed" behavior
Akazawa, Masako,Uchida, Kingo,De Jong, Jaap J. D.,Areephong, Jetsuda,Stuart, Marc,Caroli, Giuseppe,Browne, Wesley R.,Feringa, Ben L.
supporting information; experimental part, p. 1544 - 1547 (2008/10/09)
Dithienylperhydrocyclopentene-bisurea-based low molecular weight gelators are described that function as photoresponsive organogels that show a remarkable gel-to-liquid transition upon irradiation. The two series of derivatives, with and without alkyl spacers between the urea hydrogen bonding groups and the photochromic unit, show different gelation behavior. Upon UV irradiation of the gels, a gel liquified at only 1.4% conversion of the photochromic unit. Transmission electron microscopy (TEM) shows that the gel fibres consist of thin ribbons. Semi-empirical (PM3) calculations indicate that the hydrogen bonding between the open-ring isomer (o) molecules is weak, and that formation of the closed-ring isomer (c) destabilises the hydrogen bonding further. The results indicate that a small amount of the closed-ring isomer will disrupt the intermolecular hydrogen-bonding, leading to disintegration of the gel fibre ribbons and hence reversible liquification. The Royal Society of Chemistry 2008.
