Microporous Poly(Schiff Base) Constructed from Tetraphenyladamantane Units for Adsorption of Gases and Organic Vapors

Abstract

A new microporous poly(Schiff base) (PSN-3) is constructed from 1,3,5,7-tetrakis(4-formylphenyl)adamantane and 1,3,5,7-tetrakis(4-aminophenyl)adamantane through an A4 -A4 ' reaction. The surface and internal morphologies of porous PSN-3 are examined by FE-SEM and HR-TEM. PSN-3 exhibits a BET surface area of 865 m(2) g(-1) with a major pore size around 0.6 nm. Moreover, PSN-3 can uptake 1.32 wt% H2 (77 K/1 bar), 13.6 wt% CO2 (273 K/1 bar), 80.5 wt% benzene, and 63.7 wt% cyclohexane (298 K/0.9 bar). The adsorption selectivities for CO2/N2, CO2/CH4, benzene/N2, and benzene/H2O are 88, 16, 267, and 19, respectively. The high adsorption capacities and selectivities for gases and vapors make PSN-3 a promising candidate for H2 storage, CO2 capture, and recovery of organic pollutants.

Advances in Porous Organic Polymers for Efficient Water Capture

“…Wang et al . reported the synthesis of microporous poly(Schiff base), PSN‐3, in which each tetraphenyladamantane moiety is connected by aldimine functionalities through a condensation reaction between formyl and amino groups.…”

Microporous carbonaceous adsorbents for CO2separation via selective adsorption

“…However, it should be pointed out that such high selectivities are determined by from the initial slopes of the adsorption isotherms for different gases instead of the more generally accepted IAST method. 134 Tetraphenyladamantane-based polyaminals (PAN-1 and PAN-2) have been successfully synthesized through polycondensation reaction (Fig. 9).…”

Efficient and Reusable Metal Heterogeneous Catalysts for Conversion of CO2Prepared from a Microwave Synthetized Porous Polyiminopyridine

“…Nitrogen rich porous polymeric materials are becoming very important in polymer chemistry because they combine the advantageous properties of the nitrogen functionality with versatility, robustness, chemical and thermal stability and moldable surfaces areas of porous polymers. N‐rich porous polymers include porous polyamines, polyaminals, porous imine‐linked polymers (polyimines or poly‐Schiff bases), carbazole‐based porous organic polymers, polybenzimidazoles, polyimides and cyanate resins …”

“…This has significant advantages for industrial scale‐up production but difficult to control the size and distribution of pores . However, most of the procedures reported involve temperatures ranging from 120 to 280 °C and long reaction times, between 1 to 3 days . Thus, synthetic procedures of porous polyimines under more suitable environmental conditions, is necessary.…”