LiBO·Hdap·HO: A Cotemplated Acentric Layer-Pillared Borate Built by Mixed Oxoboron Clusters.

An acentric layer-pillared borate, LiBO·Hdap·HO (, dap = 1,3-diaminopropane), cotemplated by organic and inorganic cations and build by mixed oxoboron cluster units of BO and BO, has first been made under solvothermal conditions, in which the BO clusters link each other to form 2D layers containing 9-membered ring (MR) windows, while the BO clusters join together to produce 1D chains that further perform as the pillars to connect neighboring layers, resulting in a 3D layer-pillared framework with 13- and 7-MR channels located by Hdap and Li cations, respectively. Its second harmonic generation shows a response of ∼2.1 times that of KDP (KHPO).