Planar Ni(II), Cu(II) and Co(II) tetraaza[14]annulenes: structural, electronic and magnetic properties and application to field effect transistors
Planar Ni(II), Cu(II) and Co(II) tetraaza[14]annulenes: structural, electronic and magnetic properties and application to field effect transistors
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DOI：
10.1039/c2jm33079b
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发表时间：
2012-08
影响因子：
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通讯作者：
Alexander M. Whyte;Yoshiaki Shuku;G. Nichol;M. Matsushita;K. Awaga;N. Robertson
中科院分区：
文献类型：
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作者：
Alexander M. Whyte;Yoshiaki Shuku;G. Nichol;M. Matsushita;K. Awaga;N. Robertson
合成了一系列平面Ni（II）、Cu（II）和Co（II）四氮杂[14]轮烯，并对其进行了光学、电化学和磁学研究。这些配合物中的每一个的薄膜已经通过真空沉积来制备，以评估场效应晶体管（FET）的性能以及所形成的膜的形态和结晶度。电化学和UV/维斯吸收研究表明，材料具有氧化还原活性和高度着色，在可见光区的摩尔消光系数高达80 000 M−1 cm−1。顺磁性配合物显示出弱的反铁磁相互作用，符合Bonner-Fisher链模型。每种材料在真空沉积时形成多晶薄膜，并显示出场效应晶体管的行为，电荷载流子迁移率在10−5至10−9 cm 2 V−1 s−1范围内。衬底的SEM成像表明，中心金属离子及其升华温度在限定所得膜的形态方面具有至关重要的作用。
A series of planar Ni(II), Cu(II) and Co(II) tetraaza[14]annulenes has been prepared and studied optically, electrochemically and magnetically. Thin films of each of these complexes have been prepared by vacuum deposition to evaluate the field-effect transistor (FET) performance as well as the morphology and crystallinity of the film formed. The electrochemistry and UV/Vis absorption studies indicate the materials are redox active and highly coloured, with molar extinction coefficients as large as 80 000 M−1 cm−1 in the visible region. The paramagnetic complexes display weak antiferromagnetic interactions, fit to the Bonner–Fisher chain model. Each of the materials formed polycrystalline films when vacuum deposited and showed field-effect transistor behaviour, with charge carrier mobilities in the range of 10−5 to 10−9 cm2 V−1 s−1. SEM imaging of the substrates indicates that the central metal ion, and its sublimation temperature, has a crucial role in defining the morphology of the resulting film.