期刊
CHEMISTRY OF MATERIALS
卷 34, 期 5, 页码 2439-2448出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.2c00062
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资金
- Croatian Science Foundation [IP-2019-04-1242]
- Croatian Government
- European Union [KK.01.1.1.02.0016]
This article presents the crystal structure and mechanical properties of a family of one-dimensional coordination polymers, which exhibit two-dimensional anisotropic flexibility. The study reveals that the relative strength and direction of hydrogen bonding interactions play a crucial role in determining the mechanical response.
Crystals of a family of six one-dimensional (1D) coordination polymers of cadmium(II) with cyanopyridines [[CdX2L2]n, where X = Cl, Br, or I and L = 3-cyanopyridine (3CNpy) or 4-cyanopyridine (4-CNpy)] presented a variety of morphologies and mechanical responses with dominant twodimensional (2D) anisotropic flexibility, which has not been previously reported. All mechanically adaptable crystals were 2D flexible and displayed a variety of direction-dependent responses; in addition to 2D isotropic flexibility observed for solely elastic materials, 2D anisotropic flexibility was noticed for both elastic and elastic -> plastic crystals. The consequences of fine and controlled structural variations on mechanical behavior were additionally explored via microfocus single-crystal X-ray diHraction and complementary theoretical studies, revealing that the relative strength and direction of the hydrogen bonding interactions were the key parameters in delivering a specific mechanical response.
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