Li, Bin; Xu, Zhi-Qiang; Xu, Ying-Bo; Yong, Guo-Ping published the artcile< Effects of substituent groups on the crystal structures and luminescence properties of zero-/two-dimensional Zn(II) complexes>, Electric Literature of 350-03-8, the main research area is crystal structure zinc imidazopyridine polymeric monomeric preparation luminescence.
The 3-position substituted imidazo[1,2-a]pyridine ligands C7H4N2Cl-2-(CH:CHC(:O)R)-3 (L1, R = 3-pyridinyl) and (HL2, R = COOH) were facilely synthesized, and used for construction of two novel luminescent Zn(II) complexes, [ZnCl2(L1)2] (1) and [Zn(L2)2]n (2). Single-crystal x-ray diffraction anal. shows that 1 has a zero-dimensional structure, whereas, 2 possesses a two-dimensional polymeric network with rhombic grid motifs. The structural differences between 1 and 2 should be determined by the different substituent groups adjacent to the carbonyl groups of the 3-position substituted imidazo[1,2-a]pyridine ligands. Complex 1 reveals a red shifted emission band, compared to free L1 ligand, whereas, 2 displays a similar emission spectrum as the free HL2 ligand. Such results are also ascribed to substituent group effects and corresponding structural differences.
Inorganic Chemistry Communications published new progress about Crystal structure. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Electric Literature of 350-03-8.