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Chemistry Presentations Part I
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SUNY Oswego
Brown, Thomas ( Speaker )
Makara, Anna ( Speaker )
Feng, Karman ( Speaker )
Pincay, Stephany ( Speaker )
Kent, Ashley ( Speaker )
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Investigation Into Polyoxometalates by Anna Makara The exploratory synthesis of Keggin type polyoxometalates was investigated. The Keggin type was chosen for exploration because it offers thermal stability, structural diversity, and has versatile electronic properties. The reagents (sodium molybdate dihydrate, copper (II) chloride dihydrate, pyrazole) were reacted in Teflon pouches under hydrothermal conditions in Teflon-lined Paar acid digestion vessels. The known polyoxometalate, [{CuII(pz)4}2Mo8O26]2H2O, was successfully synthesized. Using this technique, the copper (II) chloride dihydrate reagent was replaced with cobalt (II) chloride to investigate unreported syntheses. This has yielded a fine pink and purple crystalline mixture. To isolate one variant, the effect of the volume of water, time in the oven and temperature on the reaction has been investigated. While these variables influenced the amount of crystallization, the reaction produced a mixture of both types. Further investigation into the unknown mixture is being done through an analysis of single-crystal X-ray diffraction data. Additional knowledge of this type of polyoxometalate can be applied to catalysts, whether it be acid, eco-friendly, or redox, and biologically, as a mimetic material in anti-viral, anti-cancer, and anti-bacterial therapies. ( ,, )
Analysis of Microbial Volatile Organic Compounds Produced from Molds Using Headspace Solid Phase Microextraction and Gas Chromatography-Mass Spectroscopy by Karman Feng, Stephany Pincay Microbial volatile organic compounds (MVOCs) are produced from many common household molds that are harmful to humans. Since it is a common occurrence in many households across the United States, it is important to have an effective and affordable method to detect these harmful chemicals in indoor air. In this project, a head space solid-phase microextraction ((HS-SPME) with a polymer-coated fiber was used to collect MVOCs and they were analyzed using gas chromatography coupled with mass spectroscopy (GC-MS). Twelve species of common mold samples were purchased for this study. These bacterial samples have shown consistent MVOC extraction using an SPME from three different containers with increasing volumes including 20-mL vial, 1.5-L jar, and 72-L container. These results indicate a promising future for using this method in an indoor room and prove more effective than the traditional visual inspection of molds in a household.
Photophysical Properties of Copper(I) as a Function of Ligand Rigidity and Bite Angle by Ashley Kent Copper(I) coordination compounds have unique photophysical properties which could have future applications in display technologies. Four-coordinate copper(I) is of particular interest due to its synthetic ease and discrete tunability. A variety of compounds were synthesized varying with respect to the steric and electronic properties of the bisphosphine and diimine ligands. In particular, the effects of the rigidity and bite angle of the various phosphine ligands were examined. The synthesized compounds were characterized using UV-vis, NMR, and IR spectroscopy. To investigate the coordination environment’s effects upon the photophysical properties, additional investigations were performed using fluorimetry. To determine the solid state structures of the monometallic compounds, vapor diffusion crystallization vials were employed. To examine the obtained crystals, X-ray crystallography was performed using Single Crystal X-ray Diffractometry.
Session Chair: Thomas Brown
Collected for SUNY Oswego Institutional Repository by the online self-submittal tool. Submitted by Zach Vickery.

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