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A burst of research activity is witnessed in the area of aggregation-induced emission enhancement (AIE(E)) of luminescent
materials because of their potential applications in organic light-emitting diode (OLED), bioimaging, biosensors for
proteins, detection of insulin fibrillation, and recognition of fingerprints. Number of organic chromophores exhibited the
behavior of AIE(E) properties, but only few of metal-free luminogens showed AIPE (aggregation-induced phosphorescence
effect) active as a result of aggregation. Different from conventional fluorescent compounds, which are singlet-state emitters,
heavy-metal phosphorescent complexes are triplet emitters. The strong metal-induced spin–orbit coupling leads to efficient
mixing of singlet–triplet states, which eliminates the spin-forbidden nature of the radiative relaxation of the triplet state, thus
enabling the enhancement of phosphorescence emission at room temperature. If these metal complexes carry amphiphilic
units such as long alkyl chains, they can undergo aggregation in aqueous solution to form micelles and vesicles leading to
enormous enhancement in luminescence with potential applications. We realized this interesting aggregation-induced emission
enhancement phenomenon for the first time in the Re(I)−tricarbonyl complexes in the past decade soon after the discovery of
AIE phenomenon. Herein, the novel behavior of rhenium(I) supramolecules comprising long alkyl chains to exhibit AIPE and
AIEE properties, and their efficacy as sensors will be explored.