A series of novel non-symmetrical coumarin-fused BODIPY dyes were synthesised. Their absorption and emission properties are strongly influenced by substitution in the coumarin moiety. Diethylamino-substituted dyes showed near-IR emission with large Stokes shifts (up to 144 nm) and good fluorescence quantum yields.

Polymeric aromatic amines were shown to be very promising cathodes for lithium-ion batteries. Surprisingly, these materials are scarcely used for designing post-lithium batteries. In this Letter, we investigate the application of the high-voltage poly(N-phenyl-5,10-dihydrophenazine) (p-DPPZ) cathodes for K-ion batteries. The designed batteries demonstrate an impressive specific capacity of 162 mAh g^–1 at the current density of 200 mA g^–1, operate efficiently at high current densities of 2–10 A g^–1, enabling charge and discharge within ∼1–4 min, and deliver the specific capacity of 125–145 mAh g^–1 with a retention of 96 and 79% after 100 and 1000 charge–discharge cycles, respectively. Finally, these K-ion batteries with polymeric p-DPPZ cathodes showed rather outstanding specific power of >3 × 10⁴ W kg^–1, thus paving a way to the design of ultrafast and durable high-capacity metal-ion batteries matching the increasing demand for high power and high energy density electrochemical energy storage devices.

We report the synthesis and investigation of a novel redox-active poly(N,N′-diphenyl-p-phenylenediamine) (PDPPD) material obtained via the Buchwald–Hartwig C–N cross-coupling reaction. PDPPD has a high density of redox-active amine groups enabling a theoretical specific capacity of 209 mA h g⁻¹, which is much higher than that of all other materials of this family reported so far. The obtained polymer was evaluated as a cathode material for dual-ion batteries and it demonstrated promising operating voltages of 3.5–3.7 V and decent practical gravimetric capacities of 97, 94 and 63 mA h g⁻¹ in lithium, sodium and potassium half-cells, respectively, while being tested at a moderate current density of 1C. A specific capacity of 84 mA h g⁻¹ was obtained for ultrafast lithium batteries operating at 100C (full charge and discharge takes 36 seconds only), which is, to the best of our knowledge, the highest battery capacity reported so far for such high current densities. The PDPPD//Li batteries also showed promising stability reflected in 67% capacity retention after 5000 charge–discharge cycles.

This review is devoted to the scientific achievements of the departments of organic chemistry in higher schools of Russia within the past decade.