No abstract

Luminescent ionic liquids are formed by the melting of tetranuclear rhenium(v) clusters.

Control of ion arrangements in ionic liquids represents a major challenge owing to the presence of the predominant coulombic interactions between cationic and anionic ion species that forms the coulombic ordering. Here, water‐induced ion rearrangement in a room‐temperature ionic liquid (RT‐IL) metal complex, (1‐ethyl‐3‐methylimidazolium)2[MnN(CN)4], is demonstrated through coordinative interactions between anions. Solidification occurred, which was associated with the formation of a “separated” structure consisting of cation columns and anionic cyanide‐bridged one‐dimensional coordination polymers. The energy diagram is in accord with the resultant RT‐IL incorporating mononuclear [MnN(CN)4]2− molecules being a kinetic phase stabilized by inter‐ion repulsions of the anionic divalent metal complex moieties. Water acts to decrease the coulombic interactions, including repulsion, giving rise to breaking of the coulombic ordering arising from coordination bond formation in the IL phase.

This letter presents a device identification method based on the distortion of a power amplifier (PA). The distortion of PA is measured by a logarithmic swept sine, which can distinguish harmonic distortion for each order. In this letter, we propose a new feature extraction utilizing each harmonic distortion to accurate device identification in a multipath environment. The proposed method can reduce computational complexity because it requires no calculation of the pseudoinverse matrix and iterative calculation. Experimental results show that the proposed method can achieve a higher identification ratio in an indoor environment.