We present here the synthesis of one enantiomeric pair of metal–organic framework materials comprised of a unique multioriented double-helix structure from an achiral spirocenter ligand. Our study clearly shows that the chiral MOF material encompasses concurrently multiple nonlinear-optical functions in the solid state: the noncentrosymmetric structural feature brings the chiral MOF high second-harmonic-generation efficiency; the incorporation of the spirocenter ligand can efficiently produce two-photon-excited photoluminescence with a larger-action cross-sectional value.

中文翻译：

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包含不寻常的多向双螺旋结构的手性金属有机骨架的非线性光学行为

我们在这里介绍了一种由非手性螺中心配体组成的对-对金属-有机骨架材料对的合成，该材料由独特的多取向双螺旋结构组成。我们的研究清楚地表明，手性MOF材料在固态中同时包含多个非线性光学功能：非中心对称的结构特征使手性MOF具有较高的二次谐波产生效率；螺中心配体的掺入可以有效地产生具有较大作用截面值的双光子激发的光致发光。