Organic Sol-Gel Synthesis: Solution-Processable Microporous Organic Networks

Concentration is critical: Amine/isocyanate polycondensation below the critical gelation concentration cg affords a sol of growing microporous molecular‐network nanoparticles rather than a gelated network (see picture, for model of particle: NCO red, NH2 blue, tetrahedral cross‐link point gray). Fur...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2010-12, Vol.49 (49), p.9504-9508
Main Authors: Moon, Su-Young, Bae, Jae-Sung, Jeon, Eunkyung, Park, Ji-Woong
Format: Article
Language:English
Subjects:
Benzyl Compounds - chemistry
Crystallography, X-Ray
Cyanates - chemistry
Gels - chemical synthesis
Gels - chemistry
Isocyanates
microporous materials
Models, Molecular
Molecular Structure
nanoparticles
Nitriles - chemistry
Particle Size
polycondensation
Porosity
sol-gel processes
Solutions
Surface Properties
thin films
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Summary:Concentration is critical: Amine/isocyanate polycondensation below the critical gelation concentration cg affords a sol of growing microporous molecular‐network nanoparticles rather than a gelated network (see picture, for model of particle: NCO red, NH2 blue, tetrahedral cross‐link point gray). Further growth to form monolithic networks occurs on solvent evaporation, analogous to sol–gel synthesis of inorganic oxide networks.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201002609