منابع مشابه
Aqueous azobenzene switching
P H O T O S : (L E F T T O R IG H T ) M V A L IG U R S K Y / IS T O C K P H O T O ; N N P H O T O S / S H U T T E R S T O C K effects of DNA damage and defects in DNA repair processes. Knowledge of how specific signatures originate could have a major impact on cancer diagnosis and prevention. One approach to address this question is to reproduce the signatures in experimental systems by genetic...
متن کاملCooperative switching events in azobenzene foldamer denaturation.
Insight into the mechanism of photoswitchable foldamer denaturation was gained by incorporating two azobenzene switching units (see figure; orange) into the helix backbone. Optimizing the location of the units leads to cooperative photoisomerization events, causing complete unfolding. The switching cooperativity coupled with the cooperative unfolding transition enables the design of highly phot...
متن کاملColorimetric cyanide detection using an azobenzene acid in aqueous solutions.
An azo-based dye (I) was designed for the detection of cyanide by utilizing a new indirect method. In the presence of Cu(II), compound I could give rise to visible red-to-yellow color change. The resultant yellow solution could change to red immediately upon the addition of trace cyanide, with the detection limit of 0.15 ppm, but no changes were observed in the presence of other anions, includi...
متن کاملPhotochromic switching of the DNA helicity induced by azobenzene derivatives
The photochromic properties of azobenzene, involving conformational changes occurring upon interaction with light, provide an excellent tool to establish new ways of selective regulation applied to biosystems. We report here on the binding of two water-soluble 4-(phenylazo)benzoic acid derivatives (Azo-2N and Azo-3N) with double stranded DNA and demonstrate that the photoisomerization of Azo-3N...
متن کاملOptothermal Switching of Cholesteric Liquid Crystals: A Study of Azobenzene Derivatives and Laser Wavelengths
The laser-initiated thermal (optothermal) switching of cholesteric liquid crystals (CLCs) is characterized by using different azobenzene (Azo) derivatives and laser wavelengths. Under 405-nm laser irradiation, Azo-doped CLCs undergo phase transition from cholesteric to isotropic. No cis-to-trans photoisomerization occurs when the 405-nm laser irradiation is blocked because only a single laser i...
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ژورنال
عنوان ژورنال: Science
سال: 2017
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.358.6360.184-g