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Macrocyclic Receptors Synthesis, History, Binding Mechanism: An Update on Current Status
Published in Satish Kumar, Priya Ranjan Sahoo, Violet Rajeshwari Macwan, Jaspreet Kaur, Mukesh, Rachana Sahney, Macrocyclic Receptors for Environmental and Biosensing Applications, 2022
Satish Kumar, Priya Ranjan Sahoo, Violet Rajeshwari Macwan, Jaspreet Kaur, Mukesh, Rachana Sahney
Cyclotriveratrylenes (CTVs) are macrocyclic receptors with a whitish appearance and possess an open pyramidal arrangement. In particular, these receptors are bowl-shaped rigid structures with a three-dimensional shape, which possess a C3 symmetry. These receptors contain 9-membered core-ring as part of the unique structural feature. These macrocyclic receptors possess a hydrophobic binding pocket and are suitable for holding bulkier species such as ortho-carborane and fullerene (Hardie 2016). Recently, there is a surge in the applications of cyclotriveratrylene in separation, sensor, gels, liquid crystals, etc. (Hardie 2010; Cai et al. 2012).
Fabrication of (a-nc) boron carbide thin films via chemical vapor deposition using ortho-carborane
Published in Journal of Asian Ceramic Societies, 2020
Rong Tu, Xuan HU, Jun Li, Meijun Yang, Qizhong Li, Ji Shi, Haiwen Li, Hitoshi Ohmori, Takashi Goto, Song Zhang
A thermal Chemical Vapor Deposition system was used for the film deposition on fused quartz substrates. Quartz glass substrates, 15 × 10 × 0.5 mm3 in size, were ultrasonically cleaned with acetone and deionized (DI) water for 20 and 10 min, and then blown dry with N2 stream. Subsequently, substrates were placed on a quartz boat and loaded into the deposition chamber. Ortho-carborane (C2H12B10, 98.0%, Zhengzhou Alfa Chemical Co., Ltd., Zhengzhou, China) is served as a single-source precursor supplying both boron and carbon atoms to the deposition process. Each process is started by establishing an Ar (Wuhan Xiangyun Chemical Co., Ltd., Wuhan, China, 99.999%) flow of 100 sccm into the evacuated chamber for 30 min to degas the chamber walls. Subsequently, o-carborane was vaporized at 220°C and introduced into the CVD chamber, signifying the start of the film deposition. Depositions were carried out under pressure 100–50,000 Pa, temperature 900–1200°C. The deposition time is set to 30 min. After deposition, the furnace was naturally cooled down to room temperature by an Ar flow of 100 sccm.