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Title: Computationally-Guided Synthetic Control over Pore Size in Isostructural Porous Organic Cages

Journal Article · · ACS Central Science

The physical properties of 3-D porous solids are defined by their molecular geometry. Hence, precise control of pore size, pore shape, and pore connectivity are needed to tailor them for specific applications. However, for porous molecular crystals, the modification of pore size by adding pore-blocking groups can also affect crystal packing in an unpredictable way. This precludes strategies adopted for isoreticular metal-organic frameworks, where addition of a small group, such as a methyl group, does not affect the basic framework topology. Here, we narrow the pore size of a cage molecule, CC3, in a systematic way by introducing methyl groups into the cage windows. Computational crystal structure prediction was used to anticipate the packing preferences of two homochiral methylated cages, CC14-R and CC15-R, and to assess the structure-energy landscape of a CC15-R/CC3-S cocrystal, designed such that both component cages could be directed to pack with a 3-D, interconnected pore structure. The experimental gas sorption properties of these three cage systems agree well with physical properties predicted by computational energy-structure-function maps.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1408449
Journal Information:
ACS Central Science, Vol. 3, Issue 7; ISSN 2374-7943
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (21)

Energy-Structure-Function Maps: Cartography for Materials Discovery journal December 2017
Constructing “breathing” dynamic skeletons with extra π-conjugated adsorption sites for iodine capture journal January 2019
Imine‐Linked Covalent Organic Cage Porous Crystals for CO 2 Adsorption journal November 2019
Solvothermal synthesis of porous organic cage CC3 in the presence of dimethylformamide as solvent journal January 2019
Computational evaluation of metal pentazolate frameworks: inorganic analogues of azolate metal–organic frameworks journal January 2018
A carbonized porous aromatic framework to achieve customized nitrogen atoms for enhanced supercapacitor performance journal January 2019
Recent advances of application of porous molecular cages for enantioselective recognition and separation journal October 2019
Core-Shell Crystals of Porous Organic Cages journal June 2018
An evolutionary algorithm for the discovery of porous organic cages journal January 2018
Computational modelling of solvent effects in a prolific solvatomorphic porous organic cage journal January 2018
From Concept to Crystals via Prediction: Multi‐Component Organic Cage Pots by Social Self‐Sorting journal September 2019
stk : A python toolkit for supramolecular assembly journal June 2018
Photocatalytic proton reduction by a computationally identified, molecular hydrogen-bonded framework journal January 2020
Barely porous organic cages for hydrogen isotope separation journal October 2019
Adsorption and sequential thermal release of F 2 , Cl 2 , and Br 2 molecules by a porous organic cage material (CC3‐R): Molecular dynamics and grand‐canonical Monte Carlo simulations journal December 2019
Computational screening for nested organic cage complexes journal January 2020
Covalent Organic Frameworks and Cage Compounds: Design and Applications of Polymeric and Discrete Organic Scaffolds journal March 2018
Supramolecular‐Macrocycle‐Based Crystalline Organic Materials journal September 2019
Core-Shell Crystals of Porous Organic Cages journal June 2018
Porous Aromatic Frameworks as a Platform for Multifunctional Applications journal February 2019
A Molecular Coordination Template Strategy for Designing Selective Porous Aromatic Framework Materials for Uranyl Capture journal July 2019


Figures / Tables (5)