L. Zhang et al., Two dimensional stair-shaped coordination polymer exhibiting three-dimensional structure with cavities, CHEM COMMUN, (8), 2000, pp. 717-718
The crystal structure of {[NaCr(2,2'-bipy)(ox)(2)](2)[bis(1-pyrazolyl)metha
ne]. 2H(2)O}(n) reveals the first 2-D stair-shaped architecture which const
ructs a 3-D network via interlayer pi-pi interactions with guest water mole
cules present in the cavities.