Transformation from Kinetically into Thermodynamically Controlled Self-Organization of Complex Helical Columns with 3D Periodicity Assembled from Dendronized Perylene Bisimides
作者： Virgil Percec , Hao-Jan Sun , Pawaret Leowanawat , Mihai Peterca , Robert Graf
DOI: 10.1021/JA400639Q
关键词: Crystallography 、 Cooling rates 、 Stereochemistry 、 Chemistry 、 Hexagonal phase 、 Monoclinic crystal system 、 Molecule 、 Perylene 、 Differential scanning calorimetry 、 Kinetic energy
摘要: The dendronized perylene 3,4:9,10-tetracarboxylic acid bisimide (PBI), (3,4,5)12G1-1-PBI, was reported by our laboratory to self-assemble into complex helical columns containing dimers of PBI with one molecule in each stratum, different intra- and interdimer rotation angles but identical distance 3.5 A, exhibiting a four-strata 21 repeat. A thermodynamically controlled 2D columnar hexagonal phase short-range intracolumnar order represents the thermodynamic product at high temperature, while kinetically monoclinic array 3D periodicity is low temperature. With heating cooling rates higher than 10 °C/min 1 °C/min, temperature periodic kinetic for this PBI. Here synthesis structural analysis library (3,4,5)nG1-m-PBI n = 12 6 m are reported. combination differential scanning calorimetry, X-ray diffracti...
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