SYNTHESIS AND CHARACTERIZATION OF HYBRID FRAMEWORKS DERIVED FROM POLY(TRIAZOLYL)BORATE LIGANDS

Porous hybrid inorganic-organic frameworks show promise for storing hydrogen for energy applications by allowing for easy uptake and release of hydrogen. They also are capable of selectively separating carbon dioxide from industrial output wastes. Hybrid frameworks derived from poly(triazolyl)borate ligands and transition metals, alkaline earth, or alkali metals were investigated to produce functional materials for dihydrogen storage and carbon dioxide separation. A new hybrid inorganic-organic framework, Na[HB(trz)3].DMF (1, trz = triazolate; DMF = dimethylformamide = (CH3)2NC(O)H) was synthesized by the recrystallization of Na[HB(trz)3] from DMF. Compound 1 crystallizes in the noncentrosymmetric Pna21 space group with a highly distorted diamond (dia) topology. Thermalgravimetric analysis (TGA) and Evolved Gas Analysis –FTIR (EGA-FTIR) measurements indicated that the DMF solvate is lost at 180 °C; the framework decomposes at 300 °C. The ligand and resulting products were analyzed by NMR (Nuclear Magnetic Resonance), IR (Infrared Spectroscopy), and X-ray diffraction, to determine purity and structure. Ongoing work involving solvent removal and gas adsorption related to potential porosity of these materials will be discussed.

Additional Abstract Information

Student(s): Jonathan A. Boltersdorf

Department: Chemistry and Biochemistry

Faculty Advisor: Dr. Barbara A. Reisner

Type: Poster

Year: 2011