CSIR-National Physical Laboratory, Dr K S Krishnan Marg, New Delhi, India.
J Colloid Interface Sci. 2012 Mar 1;369(1):40-5. doi: 10.1016/j.jcis.2011.12.020. Epub 2011 Dec 19.
A novel synthesis of the production of luminescent zinc oxide (ZnO), either in its intrinsic, metal, non-metal-doped or composite forms with high yield has been developed by parallel iterative techniques, within a combinatorial library prepared by the reduction of nitroarenes. The reduction of nitroarenes by aluminium/zinc dusts in alkaline medium (pH 10±2) forms azoxy compounds, whereas in acidic medium (pH 4.9±0.2) forms phenyl hydroxylamine and zinc/aluminium dust gets oxidised into respective hydroxide. Here, we demonstrate the reduction of nitroarenes at neutral pH (7.0±0.2), which forms intrinsic as well as doped ZnO at 50±5°C using zinc dust alone or mixtures of salts of several transition and non-transition metals in presence of 1:10 ratio of solvent and water. Interestingly, it is observed that the photoluminescence emission could be tuned in a wide range from 390 to 615 nm useful for many display related devices.
通过平行迭代技术，在通过硝基芳烃还原制备的组合库中，开发了一种新颖的合成方法，可高产率地制备发光氧化锌（ZnO），无论是其本征、金属、非金属掺杂或复合材料形式。在碱性介质（pH 10±2）中，铝/锌粉尘还原硝基芳烃形成偶氮化合物，而在酸性介质（pH 4.9±0.2）中形成苯羟胺，锌/铝粉尘被氧化成相应的氢氧化物。在这里，我们证明了在中性 pH（7.0±0.2）下还原硝基芳烃，使用锌粉或几种过渡金属和非过渡金属盐的混合物，在溶剂和水的 1:10 比例下，在 50±5°C 下形成本征和掺杂 ZnO。有趣的是，观察到光致发光发射可以在 390 到 615nm 的宽范围内调谐，这对于许多与显示相关的设备非常有用。
