Jg. Qin et al., A tetrahedral coordination compound for second-order nonlinear optics: synthesis, crystal structure and SHG of Zn(2-NH(2)py)(2)Cl-2, POLYHEDRON, 18(26), 1999, pp. 3461-3464
A coordination compound with a tetrahedral molecular configuration, Zn(NH(2
)py)(2)Cl-2(2-NH(2)py=2-aminopyridine), was prepared. It is transparent in
the visible region and shows second harmonic generation (SHG) effect 8.0 ti
mes as strong as that of KDP. X-ray single crystal structure analysis revea
ls that all Zn(NH(2)py)(2)Cl-2 molecules are aligned in a fully parallel di
rection. The advantages and disadvantages of tetrahedral zinc coordination
compounds as nonlinear optical (NLO) materials are discussed. The results m
ay represent a novel strategy for designing a new class of transparent NLO
materials. (C) 1999 Elsevier Science Ltd. All rights reserved.