Colloidal dispersion of chiral layered hydroxide salt (LHS) nanocrystals exhibiting chiroptical response
Colloidal dispersion of chiral layered hydroxide salt (LHS) nanocrystals exhibiting chiroptical response
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DOI：
10.1007/s10971-022-05766-4
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发表时间：
2022-04
影响因子：
2.5
通讯作者：
Yasuaki Tokudome;Akihiro Koyama;H. Murata;K. Okada;A. Nakahira;S. Nishimura;Masahide Takahashi
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作者：
Yasuaki Tokudome;Akihiro Koyama;H. Murata;K. Okada;A. Nakahira;S. Nishimura;Masahide Takahashi
手性无机材料在催化、电子、光子学和传感等领域受到越来越多的关注。对一类具有手性的新型功能材料进行了广泛的探索。在此，我们展示了手性氨基酸（D-或L-）苯丙氨酸（PHE）修饰的纳米镍层氢氧化物盐（Ni-LHS）的合成。用环氧丙烷在镍-苯丙氨酸水络合物初始混合物中诱导碱化反应，导致苯丙氨酸在Ni-LHS表面和层间原位插入并吸附。手性分子还可以作为表面改性剂抑制晶体的广泛生长和聚集，形成直径为2 ~ 3 nm的Ni-LHS，在溶剂中处于稳定悬浮状态。在Ni（II）金属中心d-d跃迁光谱范围内，Ni- lhs表现出诱导的圆二色性（ICD）。具有热效应的层状纳米材料作为分子检测的高级吸附剂是一种很有前途的选择。图形抽象
Chiral inorganic materials have attracted increasing attention in the fields such as catalysis, electronics, photonics, and sensing. A new class of functional materials with chirality is extensively explored. Herein, we demonstrate the synthesis of nanometric nickel layered hydroxide salt (Ni-LHS) modified with chiral amino acids, (D- or L-) phenylalanine (PHE). An alkalization reaction in a starting mixture of nickel-phenylalanine aqua complexes was induced by using propylene oxide, leading to intercalate and adsorb phenylalanine on the surface and into the interlayers of Ni-LHS in an in-situ manner. The chiral molecules also act as surface modifier to inhibit the extensive crystal growth and aggregation, to form Ni-LHS with a diameter of 2–3 nm in a state of stablly-suspended in a solvent. It was also found that Ni-LHS exhibit induced circular dichroism (ICD) in the spectral range ofd-dtransitions of Ni(II) metal centres. The layered nanomaterials with chiroptical response demonstrated here is a promising option as an advanced adsorbent for detection of molecules.Graphical abstract