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Numerous bio‐organisms employ template‐assisted crystallization of molecular solids to yield crystal morphologies with unique optical properties that are difficult to reproduce synthetically. Here, a facile procedure is presented to deposit bio‐inspired birefringent crystals of xanthine derivatives on a template of single‐crystal quartz. Crystalline sheets that are several millimeters in length, several...
Organic crystalline materials are used as dyes/pigments, pharmaceuticals, and active components of photonic and electronic devices. There is great interest in integrating organic crystals with inorganic and carbon nanomaterials to create nanocomposites with enhanced properties. Such efforts are hampered by the difficulties in interfacing organic crystals with dissimilar materials. Here, an approach...
The stabilization of G‐quadruplexes by means of K+ ions, and the separation of the nanostructures by 18‐crown‐6 or [2.2.2] cryptand, provide means to assemble switchable photonic or electrocatalytic molecular systems. On page 3654, this is exemplified with the construction of a G‐quadruplex‐based photonic “DNA spring” by I. Willner and co‐workers, and by the assembly of a switchable hemin/G‐quadruplex...
The K+/18‐crown‐6‐(or [2.2.2] cryptand)‐stimulated formation and dissociation of G‐quadruplex nanostructures lead to the cyclic and switchable photonic and electrocatalytic molecular devices.
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