Pintea Maria, Mason Nigel, Peiró-Franch Anna, Clark Ewan, Samanta Kushal, Glessi Cristiano, Schmidtke Inga Lena, Luxford Thomas
School of Physical Sciences, University of Kent, Canterbury, United Kingdom.
Department of Chemistry, University of Oslo, Oslo, Norway.
Front Chem. 2023 Jun 19;11:1028008. doi: 10.3389/fchem.2023.1028008. eCollection 2023.
With the use of proton-NMR and powder XRD (XRPD) studies, the suitability of specific Au-focused electron beam induced deposition (FEBID) precursors has been investigated with low electron energy, structure, excited states and resonances, structural crystal modifications, flexibility, and vaporization level. 4,5-Dichloro-1,3-diethyl-imidazolylidene trifluoromethyl gold(I) is a compound that is a uniquely designed precursor to meet the needs of focused electron beam-induced deposition at the nanostructure level, which proves its capability in creating high purity structures, and its growing importance in other AuIm and AuClB (where x and n are the number of radicals, B = CH, CH, or Br) compounds in the radiation cancer therapy increases the efforts to design more suitable bonds in processes of SEM (scanning electron microscopy) deposition and in gas-phase studies. The investigation performed of its powder shape using the XRPD XPERT panalytical diffractometer based on CoK lines shows changes to its structure with change in temperature, level of vacuum, and light; the sensitivity of this compound makes it highly interesting in particular to the radiation research. Used in FEBID, though its smaller number of C, H, and O atoms has lower levels of C contamination in the structures and on the surface, it replaces these bonds with C-Cl and C-N bonds that have lower bond-breaking energy. However, it still needs an extra purification step in the deposition process, either HO, O, or H jets.
通过质子核磁共振和粉末X射线衍射（XRPD）研究，利用低电子能量、结构、激发态和共振、结构晶体修饰、灵活性以及汽化水平，对特定的金聚焦电子束诱导沉积（FEBID）前驱体的适用性进行了研究。4,5-二氯-1,3-二乙基-咪唑亚基三氟甲基金（I）是一种经过独特设计的化合物，可满足纳米结构水平聚焦电子束诱导沉积的需求，证明了其在创建高纯度结构方面的能力，并且其在辐射癌症治疗中对于其他AuIm和AuClB（其中x和n为自由基数量，B = CH、CH或Br）化合物的重要性日益增加，这促使人们在扫描电子显微镜（SEM）沉积过程和气相研究中更加努力地设计更合适的键。使用基于CoK线的XRPD XPERT帕纳分析衍射仪对其粉末形状进行的研究表明，其结构会随温度、真空度和光照的变化而改变；这种化合物的敏感性使其在辐射研究中特别受关注。用于FEBID时，尽管其C、H和O原子数量较少，在结构和表面的C污染水平较低，但它用键能较低的C-Cl键和C-N键取代了这些键。然而，在沉积过程中它仍需要额外的纯化步骤，即使用HO、O或H喷射流。
