Synthesis of a Chiral Crystal Form of MOF-5, CMOF-5, by Chiral Induction
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- 作者：Shi-Yuan Zhang ; Dan Li ; Dong Guo ; Hui Zhang ; Wei Shi ; Peng Cheng ; Lukasz Wojtas ; Michael J. Zaworotko
- 刊名：Journal of the American Chemical Society
- 出版年：2015
- 出版时间：December 16, 2015
- 年：2015
- 卷：137
- 期：49
- 页码：15406-15409
- 全文大小：305K
- ISSN：1520-5126
文摘
Chiral variants of the prototypal metal鈥搊rganic framework MOF-5, 螞-CMOF-5 and 螖-CMOF-5, have been synthesized by preparing MOF-5 in the presence of l-proline or d-proline, respectively. CMOF-5 crystallizes in chiral space group P213 instead of Fm3虆m as exhibited by MOF-5. The phase purity of CMOF-5 was validated by single-crystal and powder X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, N2 adsorption, microanalysis, and solid-state vibrational circular dichroism. CMOF-5 undergoes a reversible single crystal-to-single crystal phase change to MOF-5 when immersed in a variety of organic solvents, although N-methyl-2-pyrrolidone (NMP) does not induce loss of chirality. Indeed, MOF-5 undergoes chiral induction when immersed in NMP, affording racemic CMOF-5.