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180 results on '"Wong-Foy, Antek G."'

3. Photophysics of poly(paracyclophan-1-ene) and derivatives: evidence for intrachain energy transfer and chromophore aggregation

Author

Miao, Yi-Jun, Herkstroeter, William G., Sun, Benjamin J., Wong-Foy, Antek G., and Bazan, Guillermo C.

Subjects
Polymers -- Analysis, Energy transfer -- Observations, Chemistry
Abstract

The polymer of (2.2)paracyclophan-1-ene and its other derivatives are obtained by treating the respective monomer with the Schrock initiator Mo(NAr)(OC(CF3)2Me)2-(CHCMe2Ph) (Ar = 2,6-diisopropylphenyl). These stereoregular main-chain polystilbenes are structurally related to poly(p-phenylenevinylene). The paracyclophan-1-enes have high ratios of chromophore compared to the total polymer mass. Considerable energy transfer occurs from excited monomeric stilbenes to the aggregated sites.

Published
1995

8. Coordination copolymerization mediated by [Zn.sub.4]O[(C[O.sub.2]R).sub.6] metal clusters: a balancing act between statistics and geometry

Author

Kyoungmoo Koh, Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Carbon dioxide -- Chemical properties, Organometallic compounds -- Structure, Organometallic compounds -- Chemical properties, Polymerization -- Analysis, Zinc compounds -- Structure, Zinc compounds -- Chemical properties, Chemistry
Abstract

Guidelines are provided for application of the copolymerization method by exploring coordination modes and also three new microporous coordination polymers (MCPs) are described. The MCPs prepared by the copolymerization method has shown Brunauer-Emmett-Teller (BET) surface areas and high pore volumes and the alignment of poly(3-hexylthiophene) within mesoporous channels of UMCM-1 is described as a demonstration of the unique properties of these hosts.

Published
2010

9. Linker-directed vertex desymmetrization for the production of coordination polymers with high porosity

Author

Schnobrich, Jennifer K., Lebel, Olivier, Cychosz, Katie A., Dailly, Anne, Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Carboxylation -- Analysis, Rare earth metals -- Chemical properties, Zinc -- Chemical properties, Chemistry
Abstract

Five non-interpenetrated microporous coordination polymers (MCPs) are derived by vertex desymmetrization by using linkers with symmetry inequivalent coordinating groups and these MCPs have included properties like rare metal clusters, new network topologies and supramolecular isomerism. The structural features present in MCPs derived from the reduced symmetry linkers have included the presence of more than one type of Cu-paddlewheel in a structure derived from a terphenyl tricarboxylate and a three-bladed zinc paddlewheel metal cluster in an MCP derived from a pentacarboxylated triphenylbenzene linker.

Published
2010

11. Enabling cleaner fuels: desulfurization by adsorption to microporous coordination polymers

Author

Cychosz, Katie A., Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Adsorption -- Analysis, Coordination compounds -- Structure, Coordination compounds -- Chemical properties, Fuel -- Contamination, Thiophene -- Chemical properties, Thiophene -- Structure, Chemistry
Abstract

The applications of microporous coordination polymers (MCPs) as an efficient adsorbents for the removal of the organosulfur compounds dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (DMDBT) from model diesel fuel and diesel fuel are demonstrated. The realization of high selectivities and capacities, particularly for the adsorption of the refractory compounds that are difficult to eradicate using current desulfurization techniques, in a reversible sorbent indicated that fuel desulfurization might be an important application for MCPs.

Published
2009

12. A porous coordination copolymer with over 5000 [m.sup.2]/g BET surface area

Author

Kyoungmoo Koh, Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Carboxylic acids -- Chemical properties, Porous materials -- Evaluation, Chemistry
Abstract

New levels of surface area are achieved in a coordination polymer (UMCM-2, University of Michigan Crystalline Material) derived from zinc-mediated coordination copolymerization of a dicarboxylic and tricarboxylic acid. The coordination polymers are thermally robust and hydrogen uptake performance of UMCM-2 has approached 7 wt% at 77 K.

Published
2009

13. Phase selection and discovery among five assembly modes in a coordination polymerization

Author

Caskey, Stephen R., Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Polymerization -- Analysis, Zinc compounds -- Structure, Zinc compounds -- Chemical properties, Benzene -- Structure, Benzene -- Chemical properties, Chemistry
Abstract

The combination of zinc(II) nitrate with 1,3,5-(triscarboxyphenyl)benzene ([H.sub.3]BTB) has led to five different microporous coordination polymers (MCPs). The concept of polymorphic frameworks in which the same secondary building units (SBU) and linkers are used to construct materials of different topology and pore structure is described.

Published
2008

14. Liquid phase adsorption by microporous coordination polymers: removal of organosulfur compounds

Author

Cychosz, Katie A., Wong-Foy, Antek G., and Matzger, Adam J.

Subjects
Organosulfur compounds -- Chemical properties, Organosulfur compounds -- Structure, Adsorption -- Analysis, Polymers -- Structure, Polymers -- Chemical properties, Chemistry
Abstract

The article discusses the liquid phase adsorption exhibited by the microporous coordination polymers (MCPs), which are capable of adsorbing large quantities of the organosulfur compounds. The shape and size of the pore is shown to highly affect the adsorption capacity of a given MCP.

Published
2008

15. Porous crystal derived from a tricarboxylate linker with two distinct binding motifs

Author

Wong-Foy, Antek G., Lebel, Olivier, and Matzger, Adam J.

Subjects
Copper compounds -- Structure, Copper compounds -- Chemical properties, Copper compounds -- Optical properties, Sorption -- Research, Chemistry
Abstract

Biphenyl-3,4',5-tricarboxylate is used with Cu(II) for generating a highly porous crystalline material containing both the common binuclear Cu(II) paddlewheel cluster and the exotic trinuclear Cu(II) cluster. This material has displayed relatively high excess gravimetric and volumetric [H.sub.2] uptake.

Published
2007

16. Exceptional H(sub 2) saturation uptake in microporous metal-organic frameworks

Author

Wong-Foy, Antek G., Matzger, Adam J., and Yaghi, Omar M.

Subjects
Hydrogen -- Structure, Hydrogen -- Properties, Crystallography -- Analysis, Volumetric analysis, Chemistry
Abstract

The sorption data collected for seven metal-organic framework (MOF) materials at 77 K that leads to saturation at pressures between 25 and 80 bar with uptakes from 2.0 to 7.5 wt % is reported. The results demonstrate that H2 saturation uptake in MOF's correlate well with surface area and viable volumetric densities in highly porous structures can be achieved.

Published
2006

20. Metal-Dependent Phase Selection in Coordination Polymers Derived from a C2v-Symmetric Tricarboxylate

Author

Lim, Choong-Sun, Schnobrich, Jennifer K., Wong-Foy, Antek G., and Matzger, Adam J.

Abstract

Reacting biphenyl-3,4′,5-tricarboxylic acid (H3BHTC) with the appropriate metal salt yields the microporous coordination polymers (MCPs) Mn3(BHTC)2(1), Mg3(BHTC)2(2), and Co3(BHTC)2(3) containing hourglass metal clusters. The addition of Cu to reactions with CoII, FeIII, or MnIIleads to the formation of heterobimetallic UMCM-150 isostructural analogues Co1Cu2(BHTC)2(4), Fe1Cu2(BHTC)2(5), and Mn1Cu2(BHTC)2(6) containing both paddlewheel and trinuclear metal clusters. X-ray diffraction analysis of the crystals of the heterobimetallic MCPs suggests that Cu on the trinuclear site of UMCM-150 was replaced by the other metal, whereas Cu in paddlewheel sites remains unchanged. N2sorption isotherms were measured for the mixed-metal UMCM-150 analogues, and it was confirmed that there is no structural collapse after the metal replacement.

Published
2024
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21. Nonlinear Properties in Coordination Copolymers Derived from Randomly Mixed Ligands

Author

Park, Tae-Hong, Koh, Kyoungmoo, Wong-Foy, Antek G., and Matzger, Adam J.

Abstract

Random copolymerization is a core strategy of the polymer industry, enabling broad tuning of materials properties through mixing monomers with similar reactivities. In coordination polymers, analogous results have recently been achieved using combinations of isomorphic linkers copolymerized by appropriate metals; in general, the properties of the resultant coordination copolymers can be described as a linear combination of the properties of the constituent building blocks. Here we demonstrate that this need not be the case: coordination copolymerization is a powerful strategy for directing phase formation. For example, reaction of 1,4-benzenedicarboxylic acid with Zn2+typically affords phase-impure material in N,N-dimethylformamide whereas using an amino functionalized linker leads to pure high surface area material with the structure of MOF-5. However, mixed-linker copolymers derived from a combination of both linkers display surface areas comparable to that of MOF-5 synthesized in N,N-diethylformamide, indicating that even a minor linker component can direct phase selection. In a second illustration, the pore blockage of the bulky group in 9,10-bis(triisopropylsilyloxy)phenanthrene-2,7-dicarboxylate (TPDC) not only suppresses the framework interpenetration of biphenyl-based IRMOF architectures but also blocks adsorption sites, yielding a low surface area material. However, the random coordination copolymerization of Zn2+with a mixture of TPDC and 3,3′,5,5′-tetramethyl-4,4′-biphenyldicarboxylate (Me4BPDC) controls the level of framework interpenetration and the degree of pore blockage, resulting in higher surface area (up to ∼3000 m2/g) copolymers than the noninterpenetrated Zn4O(TPDC)3and interpenetrated Zn4O(Me4BPDC)3frameworks.

Published
2024
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34. Alkane C-H activation and catalysis by an O-donor ligated iridium complex

Author

Wong-Foy, Antek G., Bhalla, Gaurav, Xiang Yang Liu, and Periana, Roy A.

Subjects
Iridium -- Chemical properties, Catalysts -- Research, Alkanes -- Chemical properties, Chemistry
Abstract

The well-defined, late-metal, O-ligated complexes are demonstrated, which are competent for alkane C-H activation. The O-ligated complexes exhibit high thermal and protic stability, and are efficient catalysts for H/D exchange reactions with alkanes.

Published
2003

37. A Crystalline Mesoporous Coordination Copolymer with High Microporosity This work was supported by the US Department of Energy through the National Energy Technology Laboratory, under Award No. DE-FG26-04NT42121.

Author

Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Ave, Ann Arbor, MI 48109-1055, USA, Fax: (+1)???734-6715-8853, Koh, Kyoungmoo, Wong-Foy, Antek G., Matzger, Adam J., Department of Chemistry and the Macromolecular Science and Engineering Program, University of Michigan, 930 North University Ave, Ann Arbor, MI 48109-1055, USA, Fax: (+1)???734-6715-8853, Koh, Kyoungmoo, Wong-Foy, Antek G., and Matzger, Adam J.

Abstract

No Abstract

Published
2008

43. A Metal???Organic Framework with a Hierarchical System of Pores and Tetrahedral Building Blocks

Author

Materials Design and Discovery Group, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095-1569, USA, Fax: (+1)???310-206-4038, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA, Sudik, Andrea C., C??t??, Adrien P., Wong-Foy, Antek G., O'Keeffe, Michael, Yaghi, Omar M., Materials Design and Discovery Group, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA, Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095-1569, USA, Fax: (+1)???310-206-4038, Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604, USA, Sudik, Andrea C., C??t??, Adrien P., Wong-Foy, Antek G., O'Keeffe, Michael, and Yaghi, Omar M.

Abstract

No Abstract

Published
2007

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