Inorganic compounds containing the −C≡N group are not called nitriles, but cyanides instead.31643-49-9, formula is C8H3N3O2, Name is 4-Nitrophthalonitrile. Though both nitriles and cyanides can be derived from cyanide salts, most nitriles are not nearly as toxic. Related Products of 31643-49-9.
Huang, Zihan;Yin, Claire;Corrado, Tanner;Li, Si;Zhang, Qinnan;Guo, Ruilan research published 《 Microporous Pentiptycene-Based Polymers with Heterocyclic Rings for High-Performance Gas Separation Membranes》, the research content is summarized as follows. Microporous polymers, such as polymers of intrinsic microporosity (PIMs) and thermally rearranged (TR) polymers, have shown promise in advancing the performance of polymer gas separation membranes to overcome the permeability-selectivity trade-off. In this work, a series of thermally rearranged pentiptycene-based polybenzoxazole (PPBO) polymers were prepared from a new pentiptycene-based poly(o-hydroxyl imide) (PPHI) precursor using carefully designed thermal protocols. Fundamental structure-property relationships within the series were established by comprehensively examining the effects of intermediate treatment temperature and the heating rate on the membrane microporosity, properties, and gas separation performance. The incorporation of bulky pentiptycene units into TR PPBO structures, along with optimized TR thermal protocols in this study, provided a route to finely tune and eventually maximize the separation performance of PPBOs, with several films far exceeding the 2015 upper bound for H2/CH4 and O2/N2. In CO2/CH4 mixed-gas permeation tests, PPBO membranes showed excellent resistance to plasticization under CO2 partial pressure as high as 6.6 atm, far surpassing the 2008 mixed-gas upper bound for CO2/CH4. Moreover, a 5 mo aged PPBO film maintained its superior separation performance above the 2008 O2/N2 upper bound and 2015 H2/CH4 upper bound, indicating the excellent aging resistance of PPBOs.
Related Products of 31643-49-9, 4-Nitrophthalonitrile, also known as 4-Nitrophthalonitrile, is a useful research compound. Its molecular formula is C8H3N3O2 and its molecular weight is 173.13 g/mol. The purity is usually > 95%.
4-Nitrophthalonitrile is a chemical substance that can be synthesized by the reaction of sodium carbonate with 3,4,5-trimethoxybenzyl alcohol. It can also be prepared using nitro phenol and sodium hydroxide. 4-Nitrophthalonitrile has been shown to have high photochemical activity in the presence of light. The frequency shift of its infrared spectrum is indicative of a nucleophilic addition reaction mechanism. 4-Nitrophthalonitrile has been used as an intermediate for producing other chemicals, such as herbicides and pharmaceuticals., 31643-49-9.
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts