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首页> 外文期刊>Crystal growth & design >In Situ Tailor-Made Additives for Molecular Crystals: A Simple Route to Morphological Crystal Engineering
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In Situ Tailor-Made Additives for Molecular Crystals: A Simple Route to Morphological Crystal Engineering

机译：分子晶体原位定制添加剂：形态晶体工程的简单途径

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摘要

We report on a new morphological crystal engineering technique introducing in situ tailor-made additives for organic molecular crystals. In the crystal growing process, phenolic substrate molecules are transformed to in situ tailor-made phenolate additives by adding a small amount of base, without any additional synthetic and purification processes. To demonstrate the in situ tailor-made additive technique, phenolic OH1 (2-(3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene)malononitrile) crystal, exhibiting highly efficient nonlinear optical and terahertz generation responses, is chosen as substrate crystal. The in situ tailor-made additive molecules containing a phenolate group exhibit considerably different stereoselective interactions with specific crystal surfaces of phenolic substrate OH1 crystals compared to analogous conventional tailor-made additives. The stereospecific interactions result in a morphological change of the grown OH1 crystal more optimal for photonic applications. To show the usefulness of the in situ tailor-made additive technique for applications as well as for fundamental research, newly created parallel surfaces in rectangular rod-shaped OH1 crystals grown in the presence of tailor-made additive are used to demonstrate the THz wave generation by optical rectification, in which one single OH1 crystal can be used in two different optical configurations. Therefore, the in situ tailor-made additive technique is very useful for morphological crystal engineering in fundamental research and various practical applications.
机译：我们报道了一种新的形态晶体工程技术，介绍了有机分子晶体的原位定制添加剂。在晶体生长过程中，无需添加任何其他合成和纯化过程，即可通过添加少量碱将酚类底物分子转化为原位定制的酚盐添加剂。为了证明现场量身定制的添加技术，酚OH1（2-（3-（4-羟基苯乙烯基）-5,5-二甲基环己-2-烯基）丙二腈）晶体表现出高效的非线性光学和太赫兹生成响应。选择作为衬底晶体。与类似的常规量身定制的添加剂相比，含有酚盐基团的量身定制的添加剂分子与酚类底物OH1晶体的特定晶体表面表现出明显不同的立体选择性相互作用。立体特异性相互作用导致生长的OH1晶体的形态变化，更适合光子应用。为了展示原位定制添加剂技术在应用和基础研究中的有用性，使用在定制添加剂存在下生长的矩形棒状OH1晶体中新创建的平行表面来演示太赫兹波的产生通过光整流，其中一个单一的OH1晶体可用于两种不同的光学配置。因此，原位定制的添加技术对于基础研究和各种实际应用中的形态晶体工程非常有用。

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