Synthesis, crystal structures and properties of lead phosphite compounds
Here, we report the preparation and characterization of two lead(II) phosphites, namely, Pb{sub 2}(HPO{sub 3}){sub 2} and Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} through hydrothermal reaction or simple solution synthesis, respectively. A new lead phosphite, namely, Pb{sub 2}(HPO{sub 3}){sub 2}, crystallizes in the noncentrosymmetric space group Cmc2{sub 1} (no. 36), which features 3D framework formed by the interconnection of 2D layer of lead(II) phosphites and 1D chain of [Pb(HPO{sub 3}){sub 5}]{sub ∞}. The nonlinear optical properties of Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} have been studied for the first time. The synergistic effect of the stereo-active lone-pairs on Pb{sup 2+} cations and π-conjugated NO{sub 3} units in Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} produces a moderate second harmonic generation (SHG) response of ∼1.8×KDP (KH{sub 2}PO{sub 4}), which is phase matchable (type I). IR, UV–vis spectra and thermogravimetric analysis (TGA) for the two compounds were also measured. - Graphical abstract: Two lead phosphites Pb{sub 2}(HPO{sub 3}){sub 2} and Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} are studied. A new lead phosphite Pb{sub 2}(HPO{sub 3}){sub 2} features a unique 3D framework structure and Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} shows a moderate SHG response of ∼1.8×KDP (KH{sub 2}PO{sub 4}). - Highlights: • A new lead phosphite, Pb{sub 2}(HPO{sub 3}){sub 2} is reported. • Pb{sub 2}(HPO{sub 3}){sub 2} features a unique 3D framework structure. • NLO property of Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} is investigated. • Pb{sub 2}(HPO{sub 3})(NO{sub 3}){sub 2} produces a moderate SHG response of ∼1.8×KDP (KH{sub 2}PO{sub 4}).
- OSTI ID:
- 22573944
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 231; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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