15min:

JUNG SUP LEE, XU WANG, SERGIY KRASNOKUTSKI AND DONG-SHENG YANG, Department of Chemistry, University of Kentucky, Lexington, KY 40506-0055.

Aluminum complexes of imidazole (1,3-C₃H₄N₂) and pyrimidine (1,3-C₄H₄N₂) are produced by interactions between laser-ablated aluminum atoms with imidazole or pyrimidine vapor in supersonic molecular beams and studied by pulsed field ionization zero electron kinetic energy spectroscopy. The ionization energies of Al-imidazole and -pyrimidine are measured to be 35344(5) and 44182(6) cm^-1, and the Al⁺-imidazole and -pyrimidine stretching frequencies are 308 and 262 cm^-1, respectively. In addition, an Al⁺-imidazole in-plane bending mode is determined to be 125 cm^-1. Preliminary spectral analysis shows that aluminum atom or ion binds with single nitrogen of the ligand, and both complexes are in C_s symmetry.