Four isostructural coordination polymer crystals having different metal ions were synthesized and studied for ball milling-induced glass formation. Distinct glass formation was discussed from crystal structures. Doping of molecules for CP glass during the milling was demonstrated, and it resulted in tunable glass properties (Tg and Tc) and enhancement of anhydrous H+ conductivity.

A new design strategy for the high-performance organic cathode-active materials of lithium-ion batteries is presented, which involves the assembly of redox-active organic molecules with a crystalline porous structure.

Hexaazatriphenylene (HAT) derivatives have attracted wide attention because of their electron‐deficient nature and unique self‐assembly properties. In this work, a facile synthesis method for obtaining HAT derivatives with alternating electron‐withdrawing nitrile and electron‐donating alkoxy groups (HATCNOCn) is proposed. Crystal structure analysis indicated that HATCNOCn forms a one‐dimensional columnar structure via strong π–π interactions. Density functional theory calculations revealed that the edge of HATCNOCn is divided into positively and negatively charged sites owing to the presence of alternating nitrile and alkoxy groups, which would induce strong π–π interactions. Thermal analysis and polarizing optical microscopy revealed that HATCNOCn exhibits columnar liquid‐crystal phases. Time‐resolved microwave conductivity measurements further demonstrated the photoconductive nature of HATCNOCn. The proposed strategy could provide a new strategy for the design of novel organic semiconductive materials.

A simple, one-pot synthesis of 1,4,5,8,9,12-hexaazatriphenylene (HAT) derivatives with different symmetries and multiple, distinct functional groups was developed. HAT derivatives containing amine and amidine groups with C 3 symmetry and HAT derivatives containing amine, amidine, and nitrile functionalities with C 2 symmetry were obtained by reacting 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene (HAT(CN) 6) with propyl amine and aniline, respectively. Crystal structure analysis, infrared spectra, and density functional theory calculations demonstrated that the amidine structures were stabilized by intramolecular hydrogen bonds.

Solvent-free synthesis is a powerful approach for obtaining elusive crystal structures of coordination polymers (CPs) and metal−organic frameworks (MOFs). However, carboxylic acids were hardly employed in solvent-free synthesis due to their high melting points (T m 's). To employ carboxylates for the construction of CP/MOFs via solvent-free synthesis, we propose utilizing the melt state of organic cocrystals containing carboxylates as a reaction media. We prepared three organic cocrystals consisting of 1,4-benzenedicarboxylate (1,4-bdc 2− ) and azolates (imidazole, 2-methylimidazole, and 2-ethylimidazole). All of them have T m 's below 200 °C, which is far lower than the T m of 1,4-H 2 bdc (402 °C) studied by differential scanning calorimetry (DSC). The solvent-free reaction of corresponding azoles, 1,4-bdc 2− , and ferrocene (T m = 173 °C) in a sealed tube reactor provided new Fe 2+ -based CP structures constructed from 1,4-bdc 2− and corresponding azolates with high purity.

There is a demand for non-precious-metal−carbon composites for use as oxygen reduction reaction (ORR) catalysts. Herein, we report the use of a sealed-tube reactor system to prepare carbon composites from metal−organic framework (MOF) precursors and to optimize its BET surface area, electric conductivity, and metal/nitrogen distribution, which all contribute to ORR performance. [Co(2-methylimidazolate) 2 ] n (ZIF-67) was sealed in a quartz tube and calcined to fabricate a cobalt−carbon composite. The optimized catalyst showed excellent ORR properties that are comparable to those of the Pt/C benchmark (electrontransport number, 3.95; current density = 33.2 mA cm −2 ).