Anisotropic high electron mobility and photodynamics of a self-assembled porphyrin nanotube including C60 molecules
Anisotropic high electron mobility and photodynamics of a self-assembled porphyrin nanotube including C60 molecules
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DOI：
10.1021/jp9076849
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发表时间：
2009-10
影响因子：
3.7
通讯作者：
Hirofumi Nobukuni;F. Tani;Y. Shimazaki;Y. Naruta;K. Ohkubo;Tatsuaki Nakanishi;Takahiko Kojima;S. Fukuzumi;S. Seki
中科院分区：
文献类型：
--
作者：
Hirofumi Nobukuni;F. Tani;Y. Shimazaki;Y. Naruta;K. Ohkubo;Tatsuaki Nakanishi;Takahiko Kojima;S. Fukuzumi;S. Seki
环状卟啉二聚体（Ni 2 −CPDPy）由带有4-吡啶基的丁二炔部分连接，在溶液中将C60分子包含在其空腔内，得到1：1的包合物（C60-Ni 2 −CPDPy）。在C60 Ni 2 −CPDPy溶液的紫外-维斯吸收光谱中，在645 nm处观察到电荷转移（CT）带。在C60-Ni 2-CPDPy的循环伏安图中，与其原始氧化还原电位相比，卟啉氧化电位的阳极偏移和富勒烯还原电位的阴极偏移都很小，这表明卟啉与C60之间存在CT相互作用。在C60-Ni 2-CPDPy的晶体结构中，通过Ni 2-CPDPy的自组装形成卟啉纳米管。Ni 2 −CPDPy分子通过非经典的C−H···N氢键和吡啶基沿着晶体学B轴的π−π相互作用连接在一起。所包含的C60分子在纳米管中线性排列，提供超分子豆荚。C60 Ni 2 −CPDPy单晶的电荷载流子迁移率随温度的升高而降低。
A cyclic porphyrin dimer (Ni2−CPDPy) linked by butadiyne moieties bearing 4-pyridyl groups includes a C60 molecule inside its cavity in solution to give a 1:1 inclusion complex (C60⊂Ni2−CPDPy). The charge-transfer (CT) band is observed at 645 nm in the UV−vis absorption spectrum of the solution of C60⊂Ni2−CPDPy. In the cyclic voltammogram of C60⊂Ni2−CPDPy, a small anodic shift of the porphyrin oxidation potential and a small cathodic shift of the fullerene reduction potential compared with their original redox potentials are indicative of CT interaction from the porphyrin to C60. In the crystal structure of C60⊂Ni2−CPDPy, a porphyrin nanotube is formed by the self-assembly of Ni2−CPDPy. Ni2−CPDPy molecules link together through nonclassical C−H···N hydrogen bonds and π−π interactions of the pyridyl groups along the crystallographic b axis. The included C60 molecules are linearly arranged in the nanotube to afford a supramolecular peapod. The charge-carrier mobility of the single crystal of C60⊂Ni2−CPDPy w...