Synthesis of a Highly Electron-Deficient, Water-Stable, Large Ionic Box: Multielectron Accumulation and Proton Conductivity

Synthesis of Highly Dipolar, Zwitterionic Naphthalene Diimides: Access to Stable, Six-State Amphoteric-Redox Property, and Large NLO Response

Highly dipolar molecules are crucial in areas of optics, energy, etc. However, their effective design, synthesis, and purification remain a challenge. Herein, we report the synthesis of highly dipolar zwitterions by successive ArSN reactions via C-C and C-N bond formation to pivot donor and acceptor at the NDI core. The zwitterions reveal a large nonlinear optical response, excited-state dipole moments up to 47 D, which is one of the largest observed in arylene diimides.

Multi-hydrophilic groups synergistic assembly ionic HOFs with multiple-water clusters and superprotonic single-crystal conductivity

Two ionic hydrogen-bonded organic frameworks (iHOF-43 and iHOF-44) containing multiple-water clusters were prepared through the synergistic induction strategy of the multi-hydrophilic groups. The proton conductivity of iHOF-43 along the a-axis attained 1.66 × 10-1 S cm-1, which provided a guiding direction for the design of superprotonic conductive materials with multiple-water clusters.

Proton-assisted seven-electron acceptor properties of di-iso-propylphenyl-bis-iminoacenaphthene

Herein, we report the record-breaking seven-electron reduction of di-iso-propylphenyl-bis-iminoacenaphthene (dpp-bian) involving protons under chemical and electrochemical reduction conditions. Using the dpp-bian-H2 compound as a starting reagent, its mono- and trisodium salts were obtained. A voltammetric study showed that the trinuclear sodium salt can accept an additional seventh electron upon electrochemical reduction.

Giant Cavity Macrocycle: Synthesis, Structure, and Its Complexation with Pagoda[5]arene

A novel stretched hexagon structure naphthalene diimides-extended-pillar[6]arene 1 with a giant cavity size of 18.769 Å in width and 17.109 Å in height is reported. 1 exhibits highly selective binding of pagoda[5]arene compared to pillar[5]arene and prism[5]arene. Size matching and charge transfer interactions play a key role in the formation of the ring-in-ring stable complex.

Synthesis and Properties of Electron-Deficient and Electron-Rich Redox-Active Ionic π-Systems

There is growing interest towards the design and synthesis of organic redox-active systems, which exist in ionic form. Multi- redox systems entail life-sustaining processes like photosynthesis and cellular respiration. The significant challenge for material scientists is to rationally design complex molecular materials that can store and transfer multiple electrons at low operational potentials and are stable under ambient conditions. Also, important are the designed ionic π-systems that combine efficient electron and ion transport. Here, we discuss the synthesis of ionic π-systems which exist in the closed-shell form. Firstly, different classes of ionic arylenediimides and viologens with different π-linkers are discussed from the synthetic, structural and redox perspective. These ionic π-systems are based on the electron deficient π-scaffolds, and are shown to accumulate upto six electrons. We then discuss electron-rich ionic arylenediimides which can exist in anionic form or zwitterionic form. The anionic electron donors have absorption extending to the near Infrared (NIR) region and can be stabilized in aqueous solution. We also discuss the effect of the electron accumulation on the aromaticity and non-aromaticity of the naphthalene and the imide rings of the naphthalenediimides. We finally discuss in brief, the applications related to the organic mixed ionic-electronic conductors.