An attempt to synthesize a terthienyl-based analog of indacenedithiophene (IDT): unexpected synthesis of a naphtho[2,3-]thiophene derivative.

We report herein our attempt to synthesize an analog of indacenedithiophene (IDT) based on a tetraphenylhexyl substituted, covalently bridged -terthienyl unit. Instead of the expected compound the adopted synthetic route led to the formation of an unexpected, new naphtho[2,3-]thiophene derivative. The structure of this compound was fully characterized by NMR and HRMS as well as single crystal X-ray diffraction and its electronic properties have been analyzed by UV-vis absorption spectroscopy and cyclic voltammetry.

Parents and Mobile Devices, from Theory to Practice: Comparison between Perception and Attitudes to 0-5 Year Old Children's Use.

Pediatrics associations recommend avoiding the use of mobile devices (MDs) in children aged 0-2 years and limiting them to one hour per day for children aged 3-5 years. This study aimed to explore public risk perception on MDs use by children aged 0-5 years and attitudes of parents to children's use. Participants were recruited on a voluntary basis by social media using a self-administered survey.

Physical mechanisms involved in the formation and operation of memory devices based on a monolayer of gold nanoparticle-polythiophene hybrid materials.

Understanding the physical and chemical mechanisms occurring during the forming process and operation of an organic resistive memory device is a requisite for better performance. Various mechanisms were suggested in vertically stacked memory structures, but the analysis remains indirect and needs destructive characterization ( analysis of the cross-section to access the organic layers sandwiched between electrodes). Here, we report a study on a planar, monolayer thick, hybrid nanoparticle/molecule device (10 nm gold nanoparticles embedded in an electro-generated poly(2-thienyl-3,4-(ethylenedioxy)thiophene) layer), combining physical (scanning electron microscopy, physicochemical thermogravimetry and mass spectroscopy, and Raman spectroscopy) and electrical (temperature dependent current-voltage) characterization on the same device.

Mass spectrometry evidence for self-rigidification of π-conjugated oligomers containing 3,4-ethylenedioxythiophene groups using RRKM theory and internal energy calibration.

The self-rigidification of ionized π-conjugated systems based on two combinations of thiophene (T) and 3,4-Ethylenedioxythiophene (E) is investigated using mass-analyzed ion kinetic energy spectrometry (MIKES) of ions produced from electron impact ionization at 70 eV. The m/z 446 radical cations of the two isomers ETTE and TEET lead to detect m/z 418 and 390 daughter ions. The MIKE spectra differ only by the intensities of these fragment ions.

Arylamine Based Photoactive Push-Pull Molecular Systems: A Brief Overview of the Chemistry "Made in Angers".

This mini review aims at taking stock of some arylamine based push-pull chromophores developed in the "Systèmes Conjugués Linéaires" (SCL) group at the University of Angers. Selected examples highlight more than a decade of design principles and strategies implemented to afford simple and accessible soluble molecular donors as active material for organic solar cells (OSCs).