Synthesis and characterization of four novel manganese(II) chains formed by 4,4′-azobis(pyridine) and benzoate or nitrobenzoates: Stabilization of unusual ladder structures

Kar, Paramita; Drew, Michael G. B.; Gómez‐García, Carlos J.; Ghosh, Ashutosh

doi:10.1016/j.poly.2012.10.036

Cited by 14 publications

(3 citation statements)

References 63 publications

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“…The main advantages in the synthesis of such soft materials are very mild reaction conditions and enormous choices of discrete molecular building units, which lead to extended networks (host–guest complex) sustained by noncovalent interactions (e.g., H-bonding, π···π stacking, C–H···π interaction, etc.) . On the other hand, flexible and dynamic MOFs or porous coordination polymers (PCPs), so-called third generation porous frameworks as classified by Kitagawa et al, exhibit guest-induced sliding, framework breathing, and structural asymmetry (expansion or contraction) .…”

Section: Introductionmentioning

confidence: 99%

Charge-Assisted Soft Supramolecular Porous Frameworks: Effect of External Stimuli on Structural Transformation and Adsorption Properties

Hazra

Gurunatha

Maji

2013

Crystal Growth & Design

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Four novel supramolecular frameworks {(H 2 −bpee) 4 [Fe(CN) 6 ] 2 •9H 2 O} (1), {(H 2 −bpee)(H 3 O) 2 [Fe(CN) 6 ]•2H 2 O} (2), {[(H 2 -bpee)(H-bpee)] 2 [Fe(CN) 6 ] 2 •5H 2 O} (3) and {[(H 1.5 −bpee) 2 ][Fe(CN) 6 ]•6H 2 O} (4) (bpee = 1,2−bis(4−pyridyl)ethylene) have been synthesized by the reaction of bpee and K 4 [Fe(CN) 6 ] ( for 1 and 2) or K 3 [Fe(CN) 6 ] (for 3 and 4) in aqueous medium. The supramolecular structures are constructed by cooperative non−covalent hydrogen bonding and ππ interactions between protonated bpee, [Fe(CN) 6 ] 3/4− and crystalline water molecules. All the supramolecular soft hosts transformed to two different states depending upon the dehydration condition as observed from the PXRD patterns. When the compounds were activated under vacuum at 373 K (1ʹ−4ʹ), they exhibit different adsorption behaviour with different adsorbates like H 2 O, MeOH and EtOH compared to when they were activated under high vacuum at room temperature for 24 hrs (1ʺ−4ʺ). Desolvated compounds 1ʹ−4ʹ show gradual uptake of water while multistep water adsorption profiles were observed with 1ʺ−4ʺ suggesting difference in hydrophilicity in these two set of compounds. Further, 1ʹ−4ʹ and 1ʺ−4ʺ unveil type I and double step MeOH (at 293 K) adsorption profiles respectively which have been correlated to guest induced structural transformation in the desolvated soft frameworks obtained at two different activation conditions. crystals are a class of molecular complexes where two or more components are bonded by non-covalent, non-ionic intermolecular interactions. 1 The process of co-crystallization is governed by molecular recognition and self-assembly, rather than formation and deformation of covalent bonds, which is suitable for meliorating pharmaceutical formulation. 2 The synthesis of co-crystal drags immense interest 3 to the scientist in the recent years because of their application in the field of magnetism, 4 ferroelasticity, 5 nonlinear optical effect, 6 chemical storage, 7 catalysis, 8 semiconductor, 9 adsorption and separation. 10 Extended structures of co-crystals sustained by non-covalent interactions are rather soft compared to conventional porous framework structures 11 (e.g. metal-organic frameworks and zeolites). This type of structures exhibit some degree of directionality and interesting host-guest property based on non-covalent interactions. 12 The main advantages in the synthesis of such soft materials are very mild reaction conditions and enormous choice of discrete molecular building units which lead to extended networks (host-guest complex) sustained by non-covalent interactions (e.g. H-bonding, ππ stacking, C−Hπ interaction etc). 13 On the other hand, flexible and dynamic MOFs or porous coordination polymers (PCPs), so called 3rd generation porous frameworks as classified by Kitagawa et al., 14 exhibit guest induced sliding, frameworkbreathing, and structural asymmetry (expansion or contraction). 16 Furthermore, this type of soft framework materials also demonstrated interesting properties in t...

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Section: Introductionmentioning

confidence: 99%

Charge-Assisted Soft Supramolecular Porous Frameworks: Effect of External Stimuli on Structural Transformation and Adsorption Properties

Hazra

Gurunatha

Maji

2013

Crystal Growth & Design

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“…The resultant crystalline materials have potential applications in a range of fields, including optical, electronic, magnetic, absorbent, catalytic materials and so on [1][2][3][4][5][6][7][8][9]. Infinite 1-D, 2-D and 3-D nets built from organic and metal-organic components via hydrogen bonding and metal-to-ligand coordinate bonding have diverse topology, connectivity and interpenetration modes [10][11][12][13][14][15][16][17][18][19][20][21]. The choice of organic component is crucial, both for its metal coordination properties, and also for the provision of strong hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

“…Dicyanamide (dca) has already been used extensively for the synthesis of polymetallic complexes with interesting supramolecular architectures [12,13]. Dca-based coordination polymers have also attracted much attention because of their ability to facilitate the synthesis of metalorganic frameworks containing channels and cavities with various sizes and shapes [11].…”

Section: Introductionmentioning

confidence: 99%

Two three-dimensional supramolecular networks built from metallophenols through hydrogen bonds and coordinate bonds

Zheng

Zhou

2015

Transition Met Chem

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Crystallization of Co(NO 3 ) 2 with 4-(imidazol-1-yl)phenol (L) gave a complex formulated as [Co(L) 6 ]-(NO 3 ) 2 , whose X-ray crystal structure revealed a twofold inclined interpenetrated network supported by extensive hydrogen bonding and p-p stacking interactions. Crystallization of Co(ClO 4 ) 2 , L and dicyanamide (dca) in ethanol gave a complex formulated as [Co(L) 4 (l-dca)] n (ClO 4 ) n4n(EtOH)ÁnH 2 O. The X-ray crystal structure of this complex consisted of a three-dimensional open framework, constructed by one-dimensional coordination chains through extensive interchain quadruplicate hydrogen bonding interactions between the phenols and uncoordinated amides. The magnetic properties of [Co(L) 4 (ldca)] n (ClO 4 ) n Á4n(EtOH)ÁnH 2 O have been studied, revealing weak antiferromagnetic exchange between cobalt atoms.

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One Metal‐Organic Framework Showing Two‐Dimensional Sheet Structure: Synthesis, Structure, and Magnetic Property

Zhou

Wang

2015

Bulletin Korean Chem Soc

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Under hydrothermal condition, the reaction of 2,4‐dichlorophenoxyacetic acid (2,4‐DH) and 1,3‐bis(4‐pyridyl)propane with MnCl2 ·2H2O gave a novel metal‐organic framework (MOF), [Mn(2,4‐D)2 (H2O)2] n (1). This complex was characterized by IR, elemental analysis, powder X‐ray diffraction, and thermogravimetry analysis. X‐Ray single‐crystal diffraction shows that the Mn(II) ions are bidendate bridged by carboxyl groups in the syn–anti mode, giving a two‐dimensional (2D) network. Temperature‐dependent magnetic studies reveal that there are weak antiferromagnetic exchange interactions between the Mn(II) ions transmitted by carboxyl groups.

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Synthesis and characterization of four novel manganese(II) chains formed by 4,4′-azobis(pyridine) and benzoate or nitrobenzoates: Stabilization of unusual ladder structures

Cited by 14 publications

References 63 publications

Charge-Assisted Soft Supramolecular Porous Frameworks: Effect of External Stimuli on Structural Transformation and Adsorption Properties

Charge-Assisted Soft Supramolecular Porous Frameworks: Effect of External Stimuli on Structural Transformation and Adsorption Properties

Two three-dimensional supramolecular networks built from metallophenols through hydrogen bonds and coordinate bonds

One Metal‐Organic Framework Showing Two‐Dimensional Sheet Structure: Synthesis, Structure, and Magnetic Property

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