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Construction of a Layered Hydrogen-Bonded Organic Framework Showing High-Contrast Mechanoresponsive Luminescence Turn-On

By Yu-Xin Peng (1864378), Yi-Tao Gan (6087470), Rong-Guang Shi (6087473), Wei Huang (36889) and Tao Tao (19313)


This paper probes the mechanoresponsive luminescence and aggregation-induced emission (AIE) properties of <i>N</i>-phenylcarbazole-based thiophene/dicyanovinyl (T–DCV) derivatives. In bis-T–DCV planar molecule <b>1</b>, a layered hydrogen-bonded organic framework (HOF) structure is formed with the assistance of multiple C–H···N and strong interlayer interactions. The formation of such a layer packing HOF structure can quench the solid fluorescent emission when aggregated as nanosuspensions but guarantees the high-contrast luminescence on–off switching (1.2 × 10<sup>3</sup> fold) in the solid state. Moreover, the grinding-induced destruction of HOF <b>1</b> is reflected by powder X-ray diffraction measurements, in which the destruction of the α and β rings in the planar HOF stripe and the close interlayer stacking could be observed. This work achieves the successful construction of long-wavelength emission AIE molecules (<b>2</b> and <b>3</b>) by introducing sufficient steric hindrance rotors to disturb the intermolecular π–π stacking and/or dipole–dipole interactions

Topics: Biophysics, Biochemistry, Molecular Biology, Neuroscience, Physiology, Pharmacology, Biotechnology, Ecology, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, grinding-induced destruction, steric hindrance rotors, long-wavelength emission AIE molecules, mechanoresponsive luminescence, molecule 1, HOF 1, paper probes, HOF stripe, interlayer interactions, powder X-ray diffraction measurements, aggregation-induced emission, high-contrast luminescence, HOF structure, High-Contrast Mechanoresponsive Luminescence Turn-On, Layered Hydrogen-Bonded Organic Framework, β rings
Year: 2018
DOI identifier: 10.1021/acs.jpcc.8b10118.s001
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Provided by: FigShare
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