Department of Molecular Chemistry and Materials Science, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel.
Department of Chemical Research Support, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel.
Nat Commun. 2021 May 24;12(1):3072. doi: 10.1038/s41467-021-23179-9.
Multicolor luminescent portrayal of complexed arrays is indispensable for many aspects of science and technology. Nevertheless, challenges such as inaccessible readouts from opaque objects, a limited visible-light spectrum and restricted spectral resolution call for alternative approaches for multicolor representation. Here, we present a strategy for spatial COlor Display by Exploiting Host-guest Dynamics (CODE-HD), comprising a paramagnetic cavitand library and various guests. First, a set of lanthanide-cradled α-cyclodextrins (Ln-CDs) is designed to induce pseudo-contact shifts in the F-NMR spectrum of Ln-CD-bound guest. Then, capitalizing on reversible host-guest binding dynamics and using magnetization-transfer F-MRI, pseudo-colored maps of complexed arrays are acquired and applied in molecular-steganography scenarios, showing CODE-HD's ability to generate versatile outputs for information encoding. By exploiting the widely shifted resonances induced by Ln-CDs, the guest versatility and supramolecular systems' reversibility, CODE-HD provides a switchable, polychromatic palette, as an advanced strategy for light-free, multicolor-mapping.
多色发光描绘复合物阵列在科学技术的许多方面都是不可或缺的。然而，诸如无法从不透明物体读取、可见光光谱有限和光谱分辨率受限等挑战，需要替代的多色表示方法。在这里，我们提出了一种通过利用主体-客体动态（CODE-HD）进行空间 COlor 显示的策略，该策略包括一个顺磁笼形 cavitand 库和各种客体。首先，设计了一组镧系元素笼状α-环糊精（Ln-CDs），以在 Ln-CD 结合客体的 F-NMR 光谱中诱导赝接触位移。然后，利用可逆的主体-客体结合动力学，并使用磁化转移 F-MRI，获得了复合物阵列的伪彩色图谱，并将其应用于分子隐写术场景，展示了 CODE-HD 生成用于信息编码的多功能输出的能力。通过利用 Ln-CDs 诱导的广泛位移共振、客体多功能性和超分子系统的可逆性，CODE-HD 提供了一种可切换的、多色的调色板，作为一种无需光照的多色映射的先进策略。
