Spontaneous assembly of a hinged coordination network

Gardner, Geoffrey B.; Venkataraman, D.; Moore, Jeffrey S.; Lee, Stephen

doi:10.1038/374792a0

Cited by 862 publications

(332 citation statements)

References 24 publications

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“…In addition, the FIBER NFAs underwent a transverse contraction when compressed in one direction and exhibited a negative Poisson's ratio ( Supplementary Fig. 16), which has also been observed in other cellular foams due to the inverting of the cell walls 10,41 . We performed shear and tensile measurements ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 96%

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

et al. 2014

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Three-dimensional nanofibrous aerogels (NFAs) that are both highly compressible and resilient would have broad technological implications for areas ranging from electrical devices and bioengineering to damping materials; however, creating such NFAs has proven extremely challenging. Here we report a novel strategy to create fibrous, isotropically bonded elastic reconstructed (FIBER) NFAs with a hierarchical cellular structure and superelasticity by combining electrospun nanofibres and the fibrous freeze-shaping technique. Our approach causes the intrinsically lamellar deposited electrospun nanofibres to assemble into elastic bulk aerogels with tunable densities and desirable shapes on a large scale. The resulting FIBER NFAs exhibit densities of 40.12 mg cm À 3 , rapid recovery from deformation, efficient energy absorption and multifunctionality in terms of the combination of thermal insulation, sound absorption, emulsion separation and elasticity-responsive electric conduction. The successful synthesis of such fascinating materials may provide new insights into the design and development of multifunctional NFAs for various applications.

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Section: Resultsmentioning

confidence: 96%

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

et al. 2014

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“…The potential of these fragile structures to act like zeolites in separations and catalysis has stimulated intense activity in the synthesis of more robust systems (9)(10)(11)(12)(13)(14)(15)(16)(17), using labile coordinate bonds or H-bonding as the supramolecular recognition elements (18)(19)(20)(21)(22).…”

mentioning

confidence: 99%

Extending supramolecular fullerene-porphyrin chemistry to pillared metal-organic frameworks

Sun

Tham

Reed

et al. 2002

Proc. Natl. Acad. Sci. U.S.A.

138

121

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Porphyrins and fullerenes are spontaneously attracted to each other. This supramolecular recognition element can be exploited to produce ordered arrays of interleaved porphyrins and fullerenes. C 60⅐H2TpyP⅐Pb(NO3)2⅐1.5TCE (H2TpyP ‫؍‬ tetra-4-pyridylporphyrin; TCE ‫؍‬ 1,1,2,2-tetrachloroethane) crystallizes in the tetragonal P4͞n space group and the structure has been solved to high resolution. The Pb 2؉ ions connect the pyridylporphyrins in infinite sheets with an interlayer spacing of 12.1 Å. The fullerenes are intercalated between these layers, acting as pillars. The 6:6 ring juncture bonds of C 60 are centered over the porphyrins, bringing the layers into strict tetragonal register. This arranagement identifies the fullerene-porphyrin interaction as a structure-defining element. The same motif is seen in a related ribbon structure having C 70 intercalated into HgI 2-linked H2TpyTP. The supramolecular design principles involved in assembling these chromophores may have applications in materials science.

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“…Up to now various assembled structures have been reported [2][3][4][5][6][7][8]. We have studied iron complexes bridged by 1,3-bis(4-pyridyl)propane (bpp), containing three methylene groups, by using single crystal X-ray diffraction analysis, Mössbauer spectroscopy and Superconducting Quantum Interference Device (SQUID) measurements.…”

Section: Introductionmentioning

confidence: 99%

The Formation Mechanism of Assembled Complexes Bridged by 1,3–Bis(4–Pyridyl)Propane

Dote¹,

Yasuhara²,

Nakashima³

2016

ChemJMold

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Abstract. Several types of differently coloured crystals (light blue, blue and red) were obtained in the synthesis of assembled complex of mixed crystals with three metals by using solvent diffusion method. The mechanism of obtaining the assembled complexes is discussed based on the structure and colour change. The red crystal has 2D interpenetrated structure. Keywords: mixed crystal, assembled complex, 1,3-bis(4-pyridyl)propane, crystal formation. IntroductionSelf-assembled coordination polymers containing transition metal ions and organic bridging ligands have attracted intensive interest in virtue of their potential abilities for selective inclusion and transformation of ions and molecules [1]. Up to now various assembled structures have been reported [2][3][4][5][6][7][8]. We have studied iron complexes bridged by 1,3-bis(4-pyridyl)propane (bpp), containing three methylene groups, by using single crystal X-ray diffraction analysis, Mössbauer spectroscopy and Superconducting Quantum Interference Device (SQUID) measurements. Fe(NCX) 2 (bpp) 2 (X = S, Se and BH 3 ) had a 2D interpenetrated structure and the NCBH 3 complex showed a spin-crossover phenomenon [9]. When the benzene is enclathrated, the structure becomes 1D chain [10]. Recently, we discussed the spin state of the mixed crystals of iron with zinc or cobalt ion in the 2D interpenetrated structure for the assembled complexes bridged by bpp, and we revealed that NCSe complex had a lowered spin state, in comparison with pure Fe complex, because iron atom is forced to reduce its radius in the zinc or cobalt complexes having smaller unit cell [11].Herein we report on the synthesis of mixed crystals including zinc, cobalt, and iron atoms. Several types of crystals appeared and the colour changed in the reaction medium. The mechanism of obtaining the assembled complexes is put into discussion on the basis of structure and colour modifi cation.

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Spontaneous assembly of a hinged coordination network

Cited by 862 publications

References 24 publications

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

Ultralight nanofibre-assembled cellular aerogels with superelasticity and multifunctionality

Extending supramolecular fullerene-porphyrin chemistry to pillared metal-organic frameworks

The Formation Mechanism of Assembled Complexes Bridged by 1,3–Bis(4–Pyridyl)Propane

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