Enhanced Second-Harmonic-Generation Response in a KHPO-Type Calcium Nitrate Carboxylate with Unusual Three-Dimensional Inorganic and Organic Connections.

An organic carboxylate ligand was employed in the synthesis of a nonhygroscopic nitrate-based nonlinear-optical (NLO) material. The hybrid-framework solid has unusual three-dimensional inorganic and organic connections with high thermal stability. Sharing similar structural features with the well-known NLO material KHPO (KDP), this compound shows an enhanced second-harmonic-generation (SHG) response of about 1.

Pillared-layered indium phosphites templated by amino acids: isoreticular structures, water stability, and fluorescence.

Two crystalline open-framework indium phosphites (denoted SCU-31 and SCU-32) were prepared using amino acids as structure-directing agents. They have isoreticular pillared-layered structures built up from 6 × 1 and 4 = 1 clusters. Notably, the two compounds show excellent water stability and exhibit blue fluorescence under UV light irradiation at room temperature.

Cluster-oxalate frameworks with extra-large channels: solvent-free synthesis, chemical stability, and proton conduction.

Two cluster-oxalate frameworks (denoted as SCU-62 and SCU-65) were prepared under solvent-free conditions. They contain extra-large 16-ring channels constructed from regular Mn(SO) double six-ring units (D6Rs) and lacunary In(HPO) D6Rs, respectively. Notably, SCU-65 remains stable in both boiling water and aqueous solutions with a pH range of 3-12.

Solvent-free synthesis of new metal phosphate-oxalates: influence of different metal ions on the framework structures.

A series of new metal phosphate-oxalates were synthesized under solvent-free conditions. These compounds display interesting open-framework structures with mmt, ins, fsd, and hcb topologies, respectively. The extra-large 20-ring channel, nanobelt-like inorganic skeleton, and the use of cadmium ions as framework cations are unprecedented in metal phosphate-oxalate structures.

Solvent-free synthesis of new inorganic-organic hybrid solids with finely tuned manganese oxalate structures.

Three manganese phosphate-oxalates have been synthesized under solvent-free conditions. These inorganic-organic hybrid solids are based on a pcu-type topology with nanobelt-like, sql-, and cds-type manganese oxalate skeletons, respectively. The amine molecules play a novel structure-directing role for the formation of different metal-organic skeletons within a specific framework topology.

A hybrid open-framework structure containing different manganese phosphate chains as its building blocks.

An open-framework hybrid solid with two different types of manganese phosphate chains has been synthesized under solvent-free conditions. A type I chain consists of isolated Mn2O10 dimers, while a type II chain contains an infinite Mn-O-Mn chain constructed from corner-sharing Mn2O10 dimers. The compound shows ferrimagnetic behavior, which is different from the antiferromagnetic behavior for its structural analogue that only contains type I manganese phosphate chains.