Discotic liquid crystals of transition metal complexes 49: establishment of helical structure of fullerene moieties in columnar mesophase of phthalocyanine-fullerene dyads
Discotic liquid crystals of transition metal complexes 49: establishment of helical structure of fullerene moieties in columnar mesophase of phthalocyanine-fullerene dyads
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DOI：
10.1142/s1088424613500752
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发表时间：
2013-11
影响因子：
1.5
通讯作者：
Lisa Tauchi;Takahiro Nakagaki;M. Shimizu;E. Itoh;M. Yasutake;K. Ohta
中科院分区：
文献类型：
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作者：
Lisa Tauchi;Takahiro Nakagaki;M. Shimizu;E. Itoh;M. Yasutake;K. Ohta
合成了一系列酞菁-富勒烯二元系化合物Cn-PcM（OFbaC_（60））（n = 6，8，10，12; M = Cu，Ni，Co：3a-3f），并研究了间隔链长度（n = 6，8，10，12）和中心金属（M = Cu，Ni，Co）对介晶性的影响.有趣的是，较短间隔基取代的（n = 6，8; M = Cu）二联体3a和3b显示六方柱状中间相（Colh），而较长间隔基取代的（n = 10，12; M = Cu，Ni，Co）二联体3c-3f显示四方柱状中间相（Coltet）。更有趣的是，这些柱状中间相在0.8 < 2θ < 2.0度的非常小的角度区域中给出了非常独特的XRD反射峰，表示为峰H。我们已经建立了在第一次从我们开发的两个新的XRD样品制备技术，峰H是由于螺旋结构的富勒烯周围的柱形成的一维堆叠的Pc核心。最近提出了两个电极之间的给体和受体的一维纳米阵列结构，以获得更高的有机薄膜太阳能电池光电转换效率。这种1D纳米阵列结构几乎与两个玻璃板之间的本发明的垂直排列的Pc-C60二联体3a-3f相容。因此，这些新颖的Pc-C60二联体3a-3f可能非常适合于有机薄膜太阳能电池。
A homologous series of the phthalocyanine-fullerene dyads, Cn-PcM(OFbaC60) (n = 6, 8, 10, 12; M = Cu, Ni, Co: 3a–3f) have been synthesized to obtain homeotropic alignment at rt and investigate the effects of spacer chain length (n = 6, 8, 10, 12) and central metal (M = Cu, Ni, Co) on the mesomorphism. Interestingly, the shorter-spacer-substituted (n = 6, 8; M = Cu) dyads 3a and 3b showed a hexagonal columnar mesophase (Colh), whereas the longer-spacer-substituted (n = 10, 12; M = Cu, Ni, Co) dyads 3c–3f showed a tetragonal columnar mesophase (Coltet). Moreover, each of the homologs 3a–3e shows perfect homeotropic alignment in both the Colh and Coltet mesophases at rt. More interestingly, these columnar mesophases gave a very unique XRD reflection peak denoted as Peak H in a very small angle region of 0.8 < 2θ < 2.0 degree. We have established at the first time from our developed two new XRD sample preparation techniques that the Peak H is due to the helical structure of fullerenes around columns formed by one-dimensionally stacked Pc cores. 1D nano array structure of donor and acceptor between two electrodes is recently proposed to obtain higher photoelectric conversion efficiency for organic thin film solar cells. This 1D nano array structure is almost compatible with the present homeotropically aligned Pc-C60 dyads 3a–3f between two glass plates. Hence, these novel Pc-C60 dyads 3a–3f may be very suitable to organic thin film solar cells.