Highly Emissive and Electrochemically Stable Thienylene Vinylene Oligomers and Copolymers: An Unusual Effect of Alkylsulfanyl Substituents

Effect of Chalcogens on Electronic and Photophysical Properties of Vinylene-Based Diketopyrrolopyrrole Copolymers

“…Here the vinylene group acts as a spacer between two DPP units to reduce the interchain repulsive interaction. Additionally, vinylene units increase the donating strength to improve the push pull–interaction in D–A copolymers enhancing the p - channel mobility. ,,− Thus, by increasing the number of thiophene or selenophene groups as spacers in DPP based polymers with very long alkyl chains, a significantly higher charge carrier mobility is obtained. , In a similar way, by reducing the steric repulsion with the incorporation of shorter alkyl chains (2-hexyldecyl) in TDPP vinylene polymers, Wu et al have demonstrated a similar charge carrier mobility as in the present work with low threshold voltages which indicates a decrease in the interfacial defects.…”

Binding Geometry of Hydrogen-Bonded Chain Motif in Self-Assembled Gratings and Layers on Ag(111)

“…The self-assembly of organic molecules on surfaces via noncovalent interactions typically is driven by combinations of van der Waals forces, hydrogen bonding, or metal–organic coordination. − Much effort has been directed at understanding both the fundamental static and dynamic processes at the molecular level, as well as at optimizing the growth of thin films for use as active materials in, for example, organic electronic devices, ,− biosensors or liquid crystal displays . In the context of these applications, it is desirable to probe the degree of orientation of the functional layers to predict their properties, as well as their capability to underpin further growth beyond single two-dimensional (2D) layers.…”

“…Revealing the structural details of organic/inorganic interfaces with molecular precision offers a pathway to developing organic electronic devices with tailored and optimized features. Important properties of organic molecules that influence device performance (such as charge carrier mobility, absorption and luminescence) are, in general, highly anisotropic, ,,− and will thus strongly depend on the orientation of the molecules with respect to one another and the supporting substrate.…”