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Full-Text Articles in Physical Sciences and Mathematics
Hypervalent Iodine Compounds With Carboxylate And Tetrazolate Ligands, Avichal Vaish
Hypervalent Iodine Compounds With Carboxylate And Tetrazolate Ligands, Avichal Vaish
Chemistry Theses and Dissertations
In modern organic chemistry, hypervalent (HV) iodine(III) compounds are frequently used as oxidizing agents but application of λ3-iodanes in polymer and material chemistry is still underexplored. This dissertation describes the preparation of dynamic and self-healing materials by employing ligand exchange reactions involving HV iodine(III) compounds of the type ArIL2 (Ar = Aryl, L = ligand, e.g., carboxylate or (pseudo)halide). These compounds can undergo ligand exchange reactions in presence of nucleophiles (Nu-) to form ArINu2. Diacetoxyiodo benzene was successfully employed as a crosslinker to prepare dynamic and self-healing gels derived from carboxylate-containing polymers. Furthermore, …
Polyarylenes: Synthesis And Characterization Towards Advanced Applications, Stephen Budy
Polyarylenes: Synthesis And Characterization Towards Advanced Applications, Stephen Budy
Chemistry Theses and Dissertations
A series of semi-fluorinated and non-fluorinated Diels−Alder step-growth polyarylene polymers and co-polymers were synthesized via typical oil bath heating (days/weeks) and more rapid microwave-assisted polymerization (hours). The polymers were characterized by multi-nuclear (1H, 13C, and 19F) NMR and ATR−FTIR spectroscopy, thermal analysis (TGA, DSC, and DMA), GPC, XRD, water contact analysis (WCA), and refractive index (RI) measurements. The NMR spectra indicated a mixture of para and meta conformations through the polymer backbone increasing to more para with greater fluorine content. Thermal gravimetric analysis revealed the fluorine-containing polyarylenes possessed the highest char yields at almost 80% at …
Metal-Organic Frameworks With Metal Catecholates For O2/N2 Separation, Samuel J. Stoneburner, Hakan Demir, Wooseok Jeong, Debmalya Ray, Xuan Zhang, Omar K. Farha, Christopher J. Cramer, Ilja Siepmann, Laura Gagliardi
Metal-Organic Frameworks With Metal Catecholates For O2/N2 Separation, Samuel J. Stoneburner, Hakan Demir, Wooseok Jeong, Debmalya Ray, Xuan Zhang, Omar K. Farha, Christopher J. Cramer, Ilja Siepmann, Laura Gagliardi
Educator Scholarship
Oxygen and nitrogen are widely produced feedstocks with diverse fields of applications, but are primarily obtained via the energy-intensive cryogenic distillation of air. More energy-efficient processes are desirable, and materials such as zeolites and metal-organic frameworks (MOFs) have been studied for air separation. Inspired by recent theoretical work identifying metal-catecholates for enhancement of O2 selectivity MOFs, in this work the computation-ready experimental (CoRE) database of MOF structures was screened to identify promising candidates for incorporation of metal catecholates. Based on structural requirements, preliminary Grand-Canonical Monte Carlo simulations, and further constraints to ensure the computational feasibility, over 5,000 structures were eliminated …