Characterizations of Multiple Polymorphs of Copper Acetonitrile-Quinoxaline Complexes Synthesized

Abstract

Coinage-metal complexes are of modern interest in all fields of Chemistry due to their fascinating applications. Particularly, coordination polymers composed of Gold, Silver, or Copper (+1)-cations with organic molecules to form sophisticated mono-ligand or mixedligand coordination polymers capable of photophysical properties like absorbing or emitting light, or forming metal-organic-frameworks that can store various molecules like benzene or ammonia for storage and separation. In this research, copper acetonitrile and quinoxaline complexes with the formula [Cu(CH3CN)y(Quinoxaline)x]BF4 were synthesized with variations in the molar ratios. Green syntheses were conducted using mechanical grinding to reduce the usage of traditional solvents. Typically reactions require environmentally hazardous organic solvents. For this reason, Green Chemistry principles of seeking more environmentallyfriendly alternatives to create equally-efficient compounds are used. Comparisons and characterizations were made of the several products from various techniques like melting point, Fourier-Transform Infrared Spectroscopy (FTIR),Thermogravimetric Analysis (TGA), and Spectrofluorometry.