Abstract
The solvothermal reaction of Cd(NO3)(2)center dot 4H(2)O and KNO3 with 1,3-benzenedicarboxylic acid (m-H2BDC) in the presence of D- or L-2-amino-1-propanol (D- or L-APA) in ethanol led to two enantiomorphic Cd(II)/K(I) coordination polymers, namely [Cd3K3(D-HAPA)(3)(m-BDC)(6)(EtOH)(3)](n) (1D) and [Cd3K3(L-HAPA)(3)(m-BDC)(6) (EtOH)(3)](n) (1L). They are 3D coordination polymers with multi-walled tubular channels constructed from a novel homochiral triple concentric helical structure in which a single helix {CdK-BDC}(n) is wrapped by unequal double-helical chains {Cd-BDC}(n). Both complexes are NLO-active with weak SHG efficiencies.