scholarly journals Pyrolysis of Porous Organic Polymers under a Chlorine Atmosphere to Produce Heteroatom-Doped Microporous Carbons

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3656
Author(s):  
Wojciech Kiciński ◽  
Sławomir Dyjak ◽  
Mateusz Gratzke
Keyword(s):  
Chemical Composition ◽  
Carbon Materials ◽  
Sol Gel ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Helium Atmosphere ◽  
Microporous Carbons ◽  
Annealing Conditions ◽  
Heterocyclic Aldehydes ◽  
Oxidative Chlorine

Three types of cross-linked porous organic polymers (either oxygen-, nitrogen-, or sulfur-doped) were carbonized under a chlorine atmosphere to obtain chars in the form of microporous heteroatom-doped carbons. The studied organic polymers constitute thermosetting resins obtained via sol-gel polycondensation of resorcinol and five-membered heterocyclic aldehydes (either furan, pyrrole, or thiophene). Carbonization under highly oxidative chlorine (concentrated and diluted Cl2 atmosphere) was compared with pyrolysis under an inert helium atmosphere. All pyrolyzed samples were additionally annealed under NH3. The influence of pyrolysis and additional annealing conditions on the carbon materials’ porosity and chemical composition was elucidated.

scholarly journals Nitrogen-Doped Carbons Derived from Imidazole-Based Cross-Linked Porous Organic Polymers

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 668
Author(s):  
Wojciech Kiciński ◽  
Sławomir Dyjak
Keyword(s):  
Carbon Materials ◽  
Sol Gel ◽  
Single Atom ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Heterocyclic Aldehyde ◽  
Nitrogen Doped ◽  
Surface Areas ◽  
Carbon Gels ◽  
Heterocyclic Aldehydes

Nitrogen-doped and heteroatom multi-doped carbon materials are considered excellent metal-free catalysts, superior catalyst supports for transition metal particles and single metal atoms (single-atom catalysts), as well as efficient sorbents for gas- and liquid-phase substances. Acid-catalyzed sol–gel polycondensation of hydroxybenzenes with heterocyclic aldehydes yields cross-linked thermosetting resins in the form of porous organic polymers (i.e., organic gels). Depending on the utilized hydroxybenzene (e.g., phenol, resorcinol, phloroglucinol, etc.) and heterocyclic aldehyde variety of heteroatom-doped organic polymers can be produced. Upon pyrolysis, highly porous and heteroatom-doped carbons are obtained. Herein, polycondensation of phloroglucinol with imidazole-2-carboxaldehyde (and other, similar heterocyclic aldehydes with two heteroatoms in the aromatic ring) is utilized to obtain porous, N-doped organic and carbon gels with N-content of up to 16.5 and 12 wt.%, respectively. Utilization of a heterocyclic aldehyde with two different heteroatoms yields dually-doped carbon materials. Upon pyrolysis, the porous polymers yield ultramicroporous N-doped and N,S co-doped carbons with specific surface areas of up to 800 m2g−1. The influence of the initial composition of reactants and the pyrolysis temperature on the structure and chemical composition of the final doped organic and carbon materials is studied in detail.

Phosphorus Containing Porous Organic Polymers: Synthetic Techniques and Applications in Organic Synthesis and Catalysis

2021 ◽  
Author(s):  
Pramod Kumar ◽  
Animesh Das ◽  
Biplab Maji
Keyword(s):  
Organic Synthesis ◽  
Homogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Organic Polymer ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Porous Organic Polymer ◽  
Phosphorus Containing

The phosphorous-containing porous organic polymer is a trending material for the synthesis of heterogeneous catalysts. Decades of investigations have established phosphines as versatile ligands in homogeneous catalysis. Recently, phosphine-based heterogeneous...

scholarly journals Rational design of bifunctional conjugated microporous polymers

2021 ◽  
Author(s):  
Yanpei Song ◽  
Pui Ching Lan ◽  
Kyle Martin ◽  
Shengqian Ma
Keyword(s):  
Rational Design ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
First Report ◽  
Microporous Polymers ◽  
Conjugated Microporous Polymers

Conjugated microporous polymers (CMPs) are an emerging class of porous organic polymers that combine -conjugated skeletons with permanent micropores. Since their first report in 2007, the enormous exploration of linkage...

Highly Proton Conductive Phosphoric Acid Porous Organic Polymers via Knitting Method

2021 ◽  
Author(s):  
Tianhao Zhu ◽  
Benbing Shi ◽  
Hong Wu ◽  
Xinda You ◽  
Xiaoyao Wang ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Organic Polymers ◽  
Porous Organic Polymers
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