Triplet emitters based on platinum(II) complexes have gained major attention in recent times.[1] They can form aggregates or excimers, causing shifts in the emitted wavelengths and affecting the photoluminescence quantum yields (PLQYs). [2] Even though this effect can be exploited for the construction of white organic light emitting diodes (WOLEDs), [3] it is disadvantageous for applications where color purity is desirable. Terpyridine ligands [4] and their N^C^N and N^N^C analogues [5] have been coordinated to platinum(II), leading to neutral, mono-, or doubly charged species, some of which display bright luminescence. They can form supramolecular structures, such as nanowires, nanosheets, and polymeric mesophases, with interesting optical properties.[6]For low-molecular-weight organo-or hydrogelators, [7] the operating mechanism of gelation has been recognized as a supramolecular effect, where the constituting fibers, usually of microscale lengths and nanoscale diameters, are formed in solution predominantly by unidirectional self-assembly.[8] The entanglement of filaments gives a network that entraps solvent molecules within the compartments. As supramolecular gels provide fibrous aggregates with long-range order, they could be of interest in the fields of optoelectronic devices and sensors. In this context, organometallic gelators can display metal-metal interactions that influence their properties.[9]Herein we present a straightforward one-pot synthesis of neutral, soluble platinum(II) coordination compounds bearing a dianionic tridentate terpyridine-like ligand. The coordination of an alkyl pyridine ancillary moiety to the 2,6-bis(tetrazolyl)pyridine complex allowed us to enhance the solubility and thus the processability. The synthetic approach involved mild reaction conditions that involved a nonnucleophilic base and an adequate inorganic platinum(II) precursor. Moisture-and oxygen exclusion were not required, and the product was easily purified by repeated precipitation (Scheme 1). The emission intensity of the complex attained a PLQY of up to 87 % in thin films, with concentrationindependent color and efficiency. We demonstrated its suitability as a dopant in solution-processed OLEDs. Furthermore, we discovered that this complex is also able to selfassemble into bright nanofibers, which can interlock to yield highly emissive gels (90 % PLQY), thus constituting a versatile building block for luminescent supramolecular architectures. Scheme 1. One-pot synthesis of platinum(II) complex 4 and a representation of the self-assembly process, going from luminescent aggregates to fibers and gels.

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Zeolitic imidazolate frameworks (ZIFs) can be melt-quenched to form glasses. Here, we present an alternative route to glassy ZIFs via mechanically induced amorphisation. This approach allows various glassy ZIFs to...