Gao, Qingqing published the artcilePalladium-catalyzed polyannulation of pyrazoles and diynes toward multifunctional poly(indazole)s under monomer non-stoichiometric conditions, Application In Synthesis of 930-36-9, the publication is Polymer Chemistry (2019), 10(39), 5296-5303, database is CAplus.
A new synthetic route toward multifunctional poly(indazole)s (PIs) with an effect of monomer stoichiometry imbalance-promoted polymerization is described in this work. The palladium-catalyzed oxidative polyannulations of internal diynes and 1-methylpyrazole proceed smoothly in 1,4-dioxane at 120掳C with copper acetate monohydrate functioning as the oxidant. A series of PIs with high mol. weights (Mw up to 35 800) are generated in good yields (up to 84.0%) under monomer non-stoichiometric conditions. These polymers exhibit high thermal stability, losing merely 5% of their weights at high temperatures of 321-353掳C. The solid thin films of these PIs show high and UV-tunable refractive indexes (n = 1.8870-1.6051) in a wide wavelength range of 400-900 nm. The tetraphenylethene-containing PI shows obvious solid-state emission properties and good photosensitivity. Its thin film was successfully fabricated into a well-defined two-dimensional fluorescent photopattern with sharp edges.
Polymer Chemistry published new progress about 930-36-9. 930-36-9 belongs to pyrazoles-derivatives, auxiliary class Pyrazole, name is 1-Methylpyrazole, and the molecular formula is C4H6N2, Application In Synthesis of 930-36-9.
Referemce:
https://en.wikipedia.org/wiki/Pyrazole,
Pyrazoles – an overview | ScienceDirect Topics