Viologen-based dendritic macromolecular asterisks: synthesis and interplay with gold nanoparticles
作者:Nadia Katir、Abdelkrim El Kadib、Vincent Collière、Jean Pierre Majoral、Mosto Bousmina
DOI:10.1039/c4cc02392g
日期:——
The viologen-skeleton reacts with a hydrazine-terminated cyclotriphosphazene core to provide novel dendritic macromolecular asterisks that efficiently exchange, deliver and stabilize gold nanoparticles for up to eight months.
Molecular and Macromolecular Engineering with Viologens as Building Blocks: Rational Design of Phosphorus-Viologen Dendritic Structures
作者:Nadia Katir、Jean Pierre Majoral、Abdelkrim El Kadib、Anne-Marie Caminade、Mostapha Bousmina
DOI:10.1002/ejoc.201101376
日期:2012.1
The design of symmetric or asymmetric diversely functionalized monomer, dimer, or trimer viologens and the design of phosphorus buildingblocks allows the synthesis of unique types of mix phosphorus–viologen dendrimers. Strategies for the preparation of dendrimers of generations 0 and 1 are presented as are those for various dendrons. These methods exhibit broad applicability, high efficiency and usability
Disclosed are viologen derivatives as an electrochromic material having improved stability and lifetime, a metal oxide electrode including the same, and an electrochromic device using the viologen derivative as an electrochromic material. The viologen derivative includes a suitable regulator group capable of increasing ΔE that is a potential difference between E
1
(potential at the first redox reaction) and E
2
(potential at the second redox reaction). When ΔE increases, the mole fraction of viologen molecules present in the second reduction state decreases. Therefore, it is possible to lower the mole fraction of viologen molecules present in an irreversibly reduced state at an applied potential, thereby increasing the lifetime of an electrochromic material and an electrochromic device.