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Shape-Controlled Synthesis of Organometallic Microcrystal-Based Hollow Hexagonal Micromotors through Evaporation-Induced Supramolecular Self-Assembly
journal contribution
posted on 2016-09-27, 00:00 authored by Ting He, Huiqiong Wu, Xiaojuan Wang, Qiguang Zang, Peng Xue, Rujuan Shen, Li Dang, Yi Zhang, Juan XiangA facile strategy
was developed to fabricate structure controllable
microcrystals of ferrocene-based metal–organic (Fc-Ala-BCB)
materials through evaporation-induced self-assembly. Two distinctive
microcrystals, microrods and microtubes had been achieved by tuning
the solvents during the self-assemblies. X-ray diffraction analysis
was conducted on single crystals to investigate the packing mode of
Fc-Ala-BCB molecules, which indicated the two crystals with the hexagonal
system. Inheriting the aromaticity and chirality of ferrocenyl and l-Ala, this organic molecule self-assembled into a single-helix
structure through intermolecule hydrogen bonds and π–π
stacking. Theoretical analysis and stimulated computations were carried
out to compare the surface energies of certain planes. Among those
microcrystals, the microrods exhibited a higher chemical activity
in catalyzing the decomposition of H2O2, due
to the high-density atomic steps and kinks on the high energy surfaces.
However, the hollow hexagonal tubes displayed appropriate catalytic
activity and novel maneuverability toward catalyzing H2O2. The O2 bubbles accumulated at the inner
walls of the microtube were periodically released as individual bubbles,
suggesting their potential application as a new kind of microengine
(e.g., the microrotor).
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Organometallic Microcrystal-Based Hollow Hexagonal Micromotorsnovel maneuverabilityEvaporation-Induced Supramolecular Self-Assemblymicrorodmicrocrystalintermolecule hydrogen bondsmicrotubeevaporation-induced self-assemblyShape-Controlled Synthesissurface energiescatalyzing H 2 O 2single-helix structureO 2 bubblesenergy surfacesH 2 O 2Fc-Ala-BCB moleculeschemical activityX-ray diffraction analysisTheoretical analysismolecule self-assembled
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