title: Two additive-induced isomeric aluminoborates templated by methylamine.
abstract: Two additive-induced isomeric aluminoborates, (CH(3)NH(3))(2)(H(2)O)(2)[Al(B(5)O(10))] (1) and (CH(3)NH(3))(H(2)O)[Al(B(5)O(10))] (2), have been obtained by using small methylamine molecules as structure directing agents (SDA) under solvothermal conditions and characterized by elemental analysis, IR, TGA, powder X-ray diffraction, single-crystal X-ray diffraction, NLO determination, UV-vis spectral investigation, electronic structure calculation and ion exchange. Different arrangements of B(5)O(10) units and AlO(4) tetrahedra results in two different structures with two pairs of helical channels along [100] and [010] directions, respectively. Interestingly, the two frameworks with noncentrosymmetric and chiral space groups separately exhibit the same diamond topologies and display good second harmonic generation efficiencies of about 2.0 times the value of KDP.
authors: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, PR China.
authors: Gao-Juan
authors: GJ
authors: Cao
authors: Jian
authors: J
authors: Lin
authors: Jin-Yun
authors: JY
authors: Wang
authors: Shou-Tian
authors: ST
authors: Zheng
authors: Wei-Hui
authors: WH
authors: Fang
authors: Guo-Yu
authors: GY
authors: Yang