Three simple bisamide derivatives (G1, G2 and G3) with different structural modifications were synthesized with easy synthetic procedures in order to test their gel behaviour. The outcomes showed that hydrogen bonding was essential in gel formation; for this reason, only G1 provided satisfactory gels. The presence of methoxy groups in G2 and the alkyl chains in G3 hindered the hydrogen bonding between N-H and C=O that occurred G1. In addition, G1 provided thermally and mechanical stable gels, as confirmed with T_sol and rheology experiments. The gels of G1 were also responsive under pH stimuli and were employed as a vehicle for drug crystallization, causing a change in polymorphism in the presence of flufenamic acid and therefore providing the most thermodynamically stable form III compared with metastable form IV obtained from solution crystallization.

MXenes, a class of 2D transition metal carbides and nitrides, hold immense potential for energy storage applications due to their high electrical conductivity, large specific surface area, and tunable surface chemistry. However, their practical implementation in supercapacitors is hindered by structural instability and limited cycling durability. Here, the covalent functionalization of Ti₃C₂T_x MXenes with 5,5′‐bis(triisopropoxysilyl)‐2,2′‐bipyridine (BPS) to mitigate these limitations is investigated. The functionalization is performed in three different solvents, i.e., m‐xylene, ethanol, and isopropanol, to elucidate the influence of solvent choice on surface modification efficacy. X‐ray photoelectron spectroscopy confirms BPS incorporation in all samples, but only m‐xylene promotes effective functionalization without excessively compromising charge transport. Notably, Ti₃C₂T_x‐BPS (m‐xylene) shows enhanced ionic conductivity (2.95 mS cm⁻¹), improved H⁺ diffusion (4.08 × 10⁻¹² cm² s⁻¹), and higher pseudocapacitive contributions compared to pristine Ti₃C₂T_x. When used as the negative electrode in an asymmetric supercapacitor, the Ti₃C₂T_x‐BPS//activated carbon device achieves a maximum energy density of 32.3 Wh kg⁻¹ and a power density of 12 300 W kg⁻¹, with 88.36% capacitance retention after 15 000 cycles, significantly outperforming the pristine Ti₃C₂T_x. These findings highlight the critical role of solvent selection in achieving effective functionalization and demonstrate its impact on the development of robust, high‐performance MXene‐based supercapacitors.

The diketopyrrolopyrrole (DPP) core is widely recognized for its applications in organic electronics and photonics due to its exceptional electronic and optical properties. Recently, DPP-based materials have shown remarkable π–π stacking interactions and tunable self-assembly, making them promising candidates for gel formation. However, the development of DPP-based gels remains in its infancy, primarily hindered by challenges such as limited gelation efficiency, poor mechanical robustness, and sensitivity to environmental conditions. Overcoming these issues is crucial for unlocking their full potential in functional soft materials. This review compiles and analyzes existing studies on DPP-containing gel systems, highlighting their structural versatility, self-assembly mechanisms, and advantages over conventional gelators. By examining these works, we identify key strategies for DPP gel formation, evaluate their physicochemical performance, and discuss innovative approaches to address current limitations. Finally, we propose future research directions to advance the field and establish DPP-based gels as a robust platform for next-generation soft materials.

Deep‐red emitting waveguide‐based lasers are gaining increasing attention for integrated photonic and telecommunication technologies. Here, we report three diketopyrrolopyrrole derivatives ( DPP1 , DPP2 , DPP3 ) functionalized with different electron‐donating groups (triphenylamine, methoxytriphenylamine, and phenylphenoxazine, respectively), showing efficient performance as active materials for waveguide‐based lasers. When the compounds are dispersed in polystyrene films and excited at their green absorption bands, amplified spontaneous emission (ASE) appears at 715, 730, and 703nm for DPP1 , DPP2 , and DPP3 , respectively, with remarkable photostability (> 10 ⁵ pump pulses) under intense excitation. Ultrafast transient absorption spectroscopy was used to investigate the photophysics of these compounds, particularly the dual ASE observed in DPP1 (674 and 713 nm) and DPP2 (688 and 725 nm), when excitation is performed at 355 nm. Distributed‐feedback lasers based on top‐layer dichromated gelatin resonators with engraved 1D or 2D relief gratings were fabricated and tuned for single or dual emission. Overall, rational molecular design, extended π‐conjugation, and high photostability pave the way for deep‐red photonic materials and wavelength‐tunable organic lasers.

Naphthalimide (NI) derivatives constitute attractive building blocks for the construction of fluorescent supramolecular gels owing to their structural versatility, remarkable photophysical properties, and ability to participate in non-covalent interactions. These properties prompted us to write this review, that provides a focused overview of the representative advances reported between 2020 and 2026 in NI-based supramolecular gels, covering the evolution from low-molecular-weight organogelators and metallogels to peptide-based and water-compatible hydrogels. Particular attention is paid to the influence of molecular design on self-assembly and gelation, including the contribution of hydrogen bonding, π–π stacking, metal coordination, and other intermolecular interactions to the formation of fibrillar supramolecular networks. The close relationship between aggregation and the photophysical response of the NI chromophore is also discussed, highlighting phenomena such as aggregation-induced and aggregation-enhanced emission and gelation-induced fluorescence enhancement. These properties have enabled the development of stimuli-responsive materials displaying fluorescence modulation and gel–sol or gel–gel transitions, particularly in response to metal ions and chemical stimuli. Recent studies also further demonstrate a transition toward more complex functional systems, including fluorescent peptide hydrogels and thixotropic materials with potential biomedical applications. The main applications developed during this period, ranging from chemical sensing to smart fluorescent materials, bioimaging, and biomedical systems, are critically analyzed. Finally, current limitations and future opportunities for NI-based gels are discussed, with particular emphasis on the development of red and near-infrared emissive systems and advanced soft photonic materials.