N-methyl-2-pyrrolidone

Chemical type

• Polar aprotic organic solvent

Key properties

• High boiling point
• Strong solvating ability for aromatic and polar organic compounds
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• High dielectric constant
• Strong solvating power
• Disrupts ionic hydration shells
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Solvent for TPBTC

Enables:

• Formation of homogeneous TPBTC solution
• Infiltration into porous α-Al₂O₃ substrates

Completely removed during low-temperature heating (200–250 °C)

Functional significance

• Facilitates confined assembly of HOF-8
• Does not remain in final membrane structure

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• Major component of electronic cleaning agents
• Target solvent for desalination and recovery
• Used to evaluate membrane stability and performance

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Classification by use

• Chemical used as a solvent for framework precursor processing
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• Chemicals used as industrial solvents requiring desalination
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1. [Cite:1] Confined conversion of hydrogen-bonded organic framework into carbon molecular sieve-interlocked-substrate membrane for efficient CO2/CH4 separation, Advanced Membranes, Volume 7, June 2026, 100191
2. [Cite:2] Solvent desalination nanofiltration (SDNF) membranes with rigid microporous network, Advanced Membranes, Volume 7, June 2026, 100203