X-Ray crystallographic studies of three substituted indium(iii) phthalocyanines: effect of ring substitution and the axial ligand on molecular geometry and packing
作者:Aur�lien Auger、Paul M. Burnham、Isabelle Chambrier、Michael J. Cook、David L. Hughes
DOI:10.1039/b413189b
日期:——
Crystal structure analyses of a series of three substituted indium phthalocyanines, viz., chloro[1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyaninato]indium(III), 1, 4-fluorophenyl[1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyaninato]indium(III), 2, and racemic chloro[2-bromo-1,4-dibutoxy-8,11,15,18,22,25-hexakis(hexyl)phthalocyaninato]indium(III), 3, are reported. Despite varying the axial ligand from a chloro group to the more space demanding 4-fluorophenyl group, and introducing somewhat different substituents onto one of the benzenoid rings of one of the derivatives, the three compounds form similar types of columnar stacks. Key components of the stack structure are concave–concave pairs of molecules. The molecules are offset but allow for a significant degree of overlap. Components of these pairs then participate in a lower area convex–convex overlap with adjacent pairs to form an offset column of pairs. However, one of the compounds, 1, shows a different type of global packing to the other two. For this compound, the molecules of one column are tilted with respect to those in an adjacent column and thus exhibit a type of herring bone arrangement; the molecules of the other two compounds pack with their central planes parallel. All three compounds form apparently even and transparent films by the spin coating method. UV-vis spectroscopy shows that the visible region absorption band is shifted to the red relative to the solution phase spectra.
一系列三种取代的铟酞菁,即氯[1,4,8,11,15,18,22,25-八(己基)酞菁]铟(III), 1, 4-氟苯基[ 1,4,8,11,15,18,22,25-八(己基)酞菁]铟(III),2,和外消旋氯[2-溴-1,4-二丁氧基-8,11,15,18报道了22,25-六(己基)酞菁]铟(III), 3。尽管将轴向配体从氯基团改变为需要更多空间的4-氟苯基基团,并且在其中一种衍生物的苯环之一上引入稍微不同的取代基,但这三种化合物形成相似类型的柱状堆叠。堆叠结构的关键组成部分是凹-凹分子对。分子是偏移的,但允许很大程度的重叠。然后,这些对的组件参与与相邻对的较低区域凸凸重叠,以形成对的偏移列。然而,其中一种化合物 1 表现出与其他两种不同类型的全局堆积。对于这种化合物,一列的分子相对于相邻列中的分子倾斜,因此表现出一种人字形排列;其他两种化合物的分子以其中心平面平行排列。所有三种化合物均通过旋涂方法形成明显均匀且透明的薄膜。紫外-可见光谱表明,可见区吸收带相对于溶液相光谱向红色移动。