Insights into the low surface area of conjugated microporous polymers and methodological suggestion for the enhancement of porosity

Abstract

This work shows that the porosity of conjugated microporous polymers (CMPs) can be controlled by screening the phosphine ligands of palladium catalysts in the Sonogashira coupling of alkyne and halide building blocks.

Copper‐Free Sonogashira Coupling for High‐Surface‐Area Conjugated Microporous Poly(aryleneethynylene) Networks

“…A decrease in the relative intensity of the smaller pores is accompanied by an increase in surface area. The same tendency was reported previously and culminates in P4 for which pores at 1.10 nm were observed exclusively, and which has the highest BET surface area.…”

Colloidal Template Synthesis of Nanomaterials by Using Microporous Organic Nanoparticles: The Case of C@MoS2 Nanoadsorbents

“…The chemical composition of C-MON-2 was analyzed by using solid-state 13 CNMR spectroscopy( Figure3c). 13 CNMR peaks for the benzyl carbon,i nternal alkyne, and aromatic carbon atoms were observeda td = 64, 86-95, and1 21-147 ppm, respectively,w hich matched well with previousr eports for MON materials that were preparedf rom the same buildingb locks. [10d] Compared to MON-1, the 13 CNMR spectrum of C-MON-2 showed additional peaks at d = 18, 31, 42, 52, and 174 ppm, whichc orresponded to PVP-40000.…”

“…It has been reportedt hat the decrease in the porosity of MON materials can be attributedt ot he local packing of networks. [13] Therefore, we suggest that the entrapped PVP retarded the local packingo ft he networks, thereby enhancing the porosity and surfacea rea of C-MON-2. The pore-size distributions of MON-1 and C-MON-2 were analyzed [a] Reactionc onditions: tetra(4-ethynylphenyl)methane (0.10 g, 0.24 mmol), 1,4-diiodobenzene (0.16 g, 0.48 mmol), PVP,[ PdCl 2 (PPh 3 ) 2 ] (17 mg, 0.024mmol), CuI (4.6 mg, 0.024 mmol), Et 3 N( 20 mL), EtOH (40 mL), 100 8C, 24 h. [b] Surface area was calculated by using BET theory.…”

“…Whilst the surface area of MON‐1 was measured to be 437 m 2 g −1 , C‐MON‐2 showed an enhanced surface area of 611 m 2 g −1 (Figure a). It has been reported that the decrease in the porosity of MON materials can be attributed to the local packing of networks . Therefore, we suggest that the entrapped PVP retarded the local packing of the networks, thereby enhancing the porosity and surface area of C‐MON‐2.…”

“…The pore-size distributions of the materials were analyzed by using DFT calculations. IR spectroscopy was performed on aB ruker VERTEX 70 FTIR spectrometer.S olid-state 13 CNMR spectroscopy was performed in cross-polarization-total side band suppression (CP-TOSS) mode on a5 00 MHz Bruker AD-VANCE II NMR spectrometer at the National Center for Inter-University Research Facilities (NCIRF), Seoul National University,b yu sing a4mm magic angle spinning probe. PXRD studies were performed on aR igaku MAX-2200.…”