A three-dimensional noncentrosymmetric zinc-4,4',4''-nitrilotribenzoate structure exhibiting second-harmonic generation responses

Publication date: Available online 7 November 2019Source: Inorganic Chemistry CommunicationsAuthor(s): Dan-Dan Liu, Xin-Hui Zhang, Qing-Yan Liu, Yu-Ling WangAbstractA coordination polymer [Zn(H-ntb)]n (1) based on the tritopic carboxylate linker of 4,4',4''-nitrilotribenzoate (H3-ntb) was reported here. Compound 1 crystallizes in a polar space group of Pca21 and contains two-dimensional layers formed from the left- and right-handed helical chains pillared by the benzoate moieties to give a three-dimensional structure. The present compound 1 features a noncentrosymmetric structure and displays a strong phase-matchable second-harmonic-generation (SHG) response of 1.2 times that of potassium dihydrogen phosphate (KDP). The inherent polarity of the 4,4',4''-nitrilotribenzoate and distortive [ZnO4] tetrahedrons as well as the asymmetric arrangement of the building blocks are responsible for the SHG activity for 1.Graphical abstractA three-dimensional structure [Zn(H-ntb)]n (1) constructed from the tetrahedrally coordinated Zn(II) atoms and 4,4',4''-nitrilotribenzoate ligands was presented. Compound 1 exhibits a phase-matchable second-harmonic-generation response of 1.2 times that of KDP.

Source: Inorganic Chemistry Communications - November 9, 2019 Category: Chemistry Source Type: research