Conductivity in Thin Films of Transition Metal Coordination Complexes.

Conductivity in Thin Films of Transition Metal Coordination Complexes.
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DOI:
10.1021/acsaem.2c02999
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发表时间:
2023-02-27
影响因子:
6.4
通讯作者:
Freitag, Marina
Freitag, Marina
中科院分区:
材料科学3区
文献类型:
--
作者:
Spinelli, Giovanni;Morritt, George H.;Pavone, Michele;Probert, Michael R.;Waddel, Paul G.;Edvinsson, Tomas;Munoz-Garcia, Ana Belen;Freitag, Marina

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以二硫纶配合物[M(mnt)2]2-(mnt =马来腈二硫纶; M = Ni ~(2+)或Cu ~(2+))为阴离子,以铜(Ⅱ)配合物[Cu(Stetra)](Stetra = 6,6 ′-双(4,5-二氢噻唑-2-基)-2,2 ′-联吡啶)为阳离子,合成了两种配合物。金属中心的变化导致材料电导率的显著变化,M = Cu 2+变体(Cu-Cu)显示半导体行为,电导率约为2.5 × 10-8 S cm-1,而M = Ni 2+变体(Ni-Cu)显示没有可观察到的电导率。计算研究发现,Cu-Cu使得重组能量损失最小化,因此,电荷转移过程的势垒较低,导致报道的电导率较高。
Two coordination complexes have been made by combining the dithiolene complexes [M(mnt)2]2– (mnt = maleonitriledithiolate; M = Ni2+ or Cu2+) as anion, with the copper(II) coordination complex [Cu(Stetra)] (Stetra = 6,6′-bis(4,5-dihydrothiazol-2-yl)-2,2′-bipyri-dine) as cation. The variation of the metal centers leads to a dramatic change in the conductivity of the materials, with the M = Cu2+ variant (Cu–Cu) displaying semiconductor behavior with a conductivity of approximately 2.5 × 10–8 S cm–1, while the M = Ni2+ variant (Ni–Cu) displayed no observable conductivity. Computational studies found Cu–Cu enables a minimization of reorganization energy losses and, as a result, a lower barrier to the charge transfer process, resulting in the reported higher conductivity.
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