理论优化表明，三个吡啶甲酸分子都具有平面的平衡构型。
Theoretical optimizations show that the equilibrium geometries of the three picolinic acid molecules are planar.
研究人员首先在单晶体 TiO2 平面上制作一层或两层的单分子硒化铅量子点。
The researchers began by making samples of one or two monolayers of PbSe quantum dots deposited on flat single-crystalline TiO2.
分子共平面，共轭作用强，对增大二阶光学非线性有利。
Coplanar molecules having stronger conjugation effects facilitate the nonlinear second-order optical susceptibilities too.
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