Details

Autor(en) / Beteiligte

• Miller, Kristen
• Gayle, Jessica M.
• Roy, Soumyabrata
• Abdellah, Mohamed H.
• Hardian, Rifan
• Cseri, Levente
• Demingos, Pedro G.
• Nadella, Hema Rajesh
• Lee, Frank
• Tripathi, Manoj
• Gupta, Sashikant
• Guo, Galio
• Bhattacharyya, Sohini
• Wang, Xu
• Dalton, Alan B.
• Garg, Ashish
• Singh, Chandra Veer
• Vajtai, Robert
• Szekely, Gyorgy
• Ajayan, Pulickel

Titel

Tunable 2D Conjugated Porous Organic Polymer Films for Precise Molecular Nanofiltration and Optoelectronics

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2024-08, Vol.20 (33), p.e2401269-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• Structural design of 2D conjugated porous organic polymer films (2D CPOPs), by tuning linkage chemistries and pore sizes, provides great adaptability for various applications, including membrane separation. Here, four free‐standing 2D CPOP films of imine‐ or hydrazone‐linked polymers (ILP/HLP) in combination with benzene (B‐ILP/HLP) and triphenylbenzene (TPB‐ILP/HLP) aromatic cores are synthesized. The anisotropic disordered films, composed of polymeric layered structures, can be exfoliated into ultrathin 2D‐nanosheets with layer‐dependent electrical properties. The bulk CPOP films exhibit structure‐dependent optical properties, triboelectric nanogenerator output, and robust mechanical properties, rivaling previously reported 2D polymers and porous materials. The exfoliation energies of the 2D CPOPs and their mechanical behavior at the molecular level are investigated using density function theory (DFT) and molecular dynamics (MD) simulations, respectively. Exploiting the structural tunability, the comparative organic solvent nanofiltration (OSN) performance of six membranes having different pore sizes and linkages to yield valuable trends in molecular weight selectivity is investigated. Interestingly, the OSN performances follow the predicted transport modeling values based on theoretical pore size calculations, signifying the existence of permanent porosity in these materials. The membranes exhibit excellent stability in organic solvents at high pressures devoid of any structural deformations, revealing their potential in practical OSN applications. Pore and linkage chemistry engineering in locally ordered 2D porous conjugated polymer films exhibit precise and tunable molecular sieving ability dictated by structural predesign for membrane‐based organic solvent nanofiltration. Their microstructural anisotropy, in‐plane conjugation in a 2D layered structure, porosity, and adaptable form factors yield many interesting optical, electrical, and nanoscale properties that can find use in diverse functional applications.