Reticular chemistry is not a subdiscipline in the normal sense, but rather a way of thinking of net-forming chemical building blocks and the networks they form, or might form, in the solid state. A particular intriguing problem is that of how to combine well know geometrical shapes into 3-periodic networks with specific topologies. Knowing these construction principles are of paramount importance if we shall ever reach a level of “designing” molecule based materials such as Metal-Organic Frameworks in the true sense of crystal engineering. While many shapes have a large number of know combinations with themselves and other shapes, the hexagon has only two reported combinations with the triangle (the nets cys and dnf) and one each with the square (nts), the hexagon itself (hxg), and the triangular prism (htp). Surprisingly, there are none with neither the ubiquitous octahedron nor the tetrahedron. We report here eight MOFs based on the hexatopic and distinctively hexagon-shaped ligand hexakis(4-carboxyphenyl)-benzene, H6CPB (Figure below left). With Fe(II), Cu(II), Co(II), Zn(II) and Bi(III) a variety of topologies were obtained, from the 3D 6- and 3-connected rtl (rutile) see Figure below right, hitherto not demonstrated for hexagons and triangles, to 1D coordination polymers based on the Cu(II) paddle wheel SBU. Structures were obtained using conventional X-ray diffraction as well as electron diffraction. Gas sorption analysis indicate moderate surface areas only, but for selected MOFs we report the use of Secondary Ion Mass Spectrometry, SIMS, to elucidate the interior contents of the MOF. This is important, as one of the major ideas of MOF and COF chemistry is to place, or load, the structure with compounds not present at synthesis. Methods to investigate this are scarce. We present preliminary data on the sorption of iodine into one of our MOFs using SIMS. The choice to study I2 sorption is related to the presence the radioactive isotopes 129I and 131I in radioactive waste and in cases of nuclear accidents. New good sorption methods of iodine are needed, and MOFs are among the most promising materials investigated to date.

Hexagon-based metal-organic frameworks: Reticular chemistry and guest inclusion studied by secondary ion mass spectrometry

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.