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首页> 外文期刊>Chemistry: A European journal >Self-assembly of molecular dumbbells into organized bundles with tunable size
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Self-assembly of molecular dumbbells into organized bundles with tunable size

机译：将分子哑铃自组装成大小可调的有组织束

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摘要

Dumbbell-shaped molecules consistiong of three biphenyls connected throunghvinyl inkages as a conjugated rod segmentand aliphatic polyether dendritic wedges with different crossisections(i.e.,dibranch(1),tetrabranch(2)and hexabranch(3)were synthrsized and characterized.The molecular dumbbells self-assemble into discrete bundles that organizeinto three-dimen-sional superlattices.Molecule 1, based on a dibranched dendritic wedge,organizes into primitive monoclinic-crystalling and body-centered,tetragonal liquid crystalline structures,while molecules 2 and 3,based on tetra- and hexabranched dendritic wedges,respectively,form only body-centered,tetragonal liquid crystalline and density measurements showed that the rod-bum-dle cross-sectional ares decreaseswith increasing cross-section ofthe dendritic wedges.the influencesof suparmolecular structure on the bulk-state optical properties were investigated bymeasuring the VU/Vis absorption and steady state fluorescence spectroscopies.As the cross-section of the dendritic wedge of the molecule increases,the absorption and emission maxima shift to higher energy.This can be attributed to a quantum size effect of the three-dimen-sionally confined nanostructure
机译：合成并表征了由三个连接于苯乙烯基墨水上的三联苯基组成的哑铃形分子，它们是共轭的杆段和具有不同横截面的脂肪族聚醚树枝状楔形分子（即dibranch（1），tetrabranch（2）和hexabranch（3））。组装成离散的束，将其组织成三维超晶格。分子1基于支化的树枝状楔形体，组织成原始的单斜晶和体心四方液晶结构，而分子2和3基于四维和三维。六支树枝状楔形物分别仅形成体心，四方液晶，并且密度测量结果显示，棒状-束状横截面随着树枝状楔形物的增大而减小。超分子结构对整体态光学性质的影响通过测量VU / Vis吸收和稳态荧光光谱法进行了研究。分子的树枝状楔的oss-截面增加，吸收和发射最大值移至更高的能量。这可以归因于三维有限纳米结构的量子尺寸效应

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