Chang, Xingmao; Wang, Zhaolong; Wang, Gang; Liu, Taihong; Lin, Simin; Fang, Yu published an article in 2021. The article was titled 《Perylene Bisimide-Cored Supramolecular Coordination Complexes: Interplay between Ensembles, Excited State Processes, and Aggregation Behaviors》, and you may find the article in Chemistry – A European Journal.Product Details of 2510-22-7 The information in the text is summarized as follows:
Manipulating the optical properties of fluorescent species is challenging owing to complicated and tedious synthetic works. Herein, the photophys. properties of perylene bisimide (PBI) were effectively tuned by varying the geometrical arrangement of PBI moieties within supramol. coordination complexes (SCCs), where a PBI-based dicycle (2) and a trigonal prism (3) were generated via using a typical 90° Pt(II) reagent, cis-(PEt3)2Pt(OTf)2-based coordination-driven self-assembly approach. The ligand, an ortho-tetrapyridiyl-PBI (1), exhibits a moderate fluorescence quantum yield (∼13%) and efficient inter-system crossing (ISC). 2, however, is much more emissive with a fluorescence quantum yield of ∼41%, and the relevant ISC process is significantly hindered. The fluorescence quantum yield of 3 is merely ∼6% due to the observed symmetry-breaking charge separation (SB-CS), which turns to triplet state upon charge recombination. Interestingly, 3 could be fully transformed into 2 by simply adding a suitable amount of a 90° Pt(II)-based neutral triangle. Moreover, 2 tends to form discrete dimers both in crystal and solution states, but 3 does not show the property. Therefore, controlling geometrical arrangement of fluorophores through coordination-driven self-assembly could be taken as another effective way to tune their excited state relaxation pathways and construct high-performance optical mol. materials, which generally have to be prepared via organic synthesis. In the experiment, the researchers used 4-Ethynylpyridine(cas: 2510-22-7Product Details of 2510-22-7)
4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Product Details of 2510-22-7