Zhou, Shengyang published the artcileSynthesis of Fluorinated Poly(phenyl-alkane)s of Intrinsic Microporosity by Regioselective Aldehyde (A2) + Aromatics (B2) Friedel-Crafts Polycondensation, Application In Synthesis of 2960-93-2, the publication is Macromolecules (Washington, DC, United States) (2021), 54(13), 6543-6551, database is CAplus.
The design of functionalized porous materials is an important research direction in material science, especially for fluorine-containing materials with enhanced thermal/oxidative stability, lower dielec. constants, and better gas-selective permeation. In this work, a series of poly(phenyl-alkane)s of intrinsic microporosity (PIM-xR) were synthesized by the methanesulfonic acid-catalyzed Friedel-Crafts hydroxyalkylation polycondensation of contorted and rigid multibenzene and benzaldehyde derivatives The PIM-xR exhibited good thermal stability, excellent solution processability, and high Brunauer-Emmett-Teller (BET) surface areas (400-1200 m2 g-1). The physicochem. properties and applications of PIM-xR could be tuned by the type, quantity, distribution, and postmodification of substituents on the benzaldehyde derivatives Unlike other contorted and rigid multibenzene derivatives, only electron-rich spirobiindane derivatives directly produced soluble, linear, high-mol.-weight polymers without crosslinking because spirobisindane possesses three t-butyl-like structural units that provide large steric hindrance at potential reactive sites. Subsequently, a series of fluorinated PIMs (PIM-xF) with different fluorine contents and distributions were explored, and the relationship between the microporosity of PIM-xR and degrees of rotational freedom of the polymer chains was analyzed using these PIM-xF. Flexible and transparent PIM-xF membranes were easily obtained by solution processing and exhibited high gas permeabilities and moderate permeability selectivity. In particular, the CO2/N2 separation performance of the PIM-5F membrane exceeded the 2008 Robeson’s upper bound (PCO2 = 3240 barrer and α(CO2/N2) = 27.9). This work provides a facile method for the precise design and preparation of fluorinated or other functionalized porous materials for environmental and energy applications.
Macromolecules (Washington, DC, United States) published new progress about 2960-93-2. 2960-93-2 belongs to naphthyridine, auxiliary class Naphthalene,Ether,Other MOF ligands,Organic ligands for MOF materials, name is 2,2′-Dimethoxy-1,1′-binaphthalene, and the molecular formula is C40H35N7O8, Application In Synthesis of 2960-93-2.
Referemce:
https://en.wikipedia.org/wiki/1,8-Naphthyridine,
1,8-Naphthyridine | C8H6N2 – PubChem