Destruction and reconstruction of the robust [Cu2(OOCR)4] unit during crystal structure transformations between two coordination polymers

Du, Miao; Li, Chengpeng; Wu, Jincheng; Guo, Jian‐Hua; Wang, Gui‐Chang

doi:10.1039/c1cc12184g

Cited by 87 publications

(33 citation statements)

References 39 publications

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“…H 2 Oa cts as the accelerator to promote the speed of phase transformation,w hichi si na greement with the previous example in which two Cu-based MOFs have been reported to undergo an enthalpy-driven phaset ransformation induced by H 2 O. [12] We investigated the synergistic effects of H 2 Oa nd temperature during the nucleation period to further understand the transformation betweenM n-sdc-1 and Mn-sdc-2. First, the effects of H 2 Ow ere studied at 160 8Cb ya lteringt he volumes of DMF and H 2 Oi nt he reaction.…”

Section: Resultsmentioning

confidence: 61%

Solvent‐Triggered Reversible Phase Changes in Two Manganese‐Based Metal–Organic Frameworks and Associated Sensing Events

Huang

Zhang

Yue

et al. 2018

Chemistry A European J

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A flexible Mn-based MOF, Mn-sdc-1, has been successfully synthesized by using the ligand 4,4'-stilbenedicarboxylic acid (H sdc). Attributed to the flexibility of the framework, Mn-sdc-1 can transform into a new phase (Mn-sdc-2) with completely different structural geometry; this is induced by trace levels of H O at room temperature. Reversibly, the transformation from Mn-sdc-2 to Mn-sdc-1 can be triggered by DMF upon heating beyond 100 °C. These results inspired a study of the influences of temperature and H O volume in the solid-state transformation of two MOF phases and, for the first time, a phase diagram of MOFs has been depicted. This phase diagram reflects the gradual H O-/temperature-dependent changes between Mn-sdc-1 and Mn-sdc-2, which is very meaningful in achieving the controllable synthesis of these two MOFs and lead to targeting the desired water-stable structure. As a result, the obtained water-stable Mn-sdc-2 can be developed as an excellent Pb sensor in aqueous solution through the luminescence quenching effect with a limit of detection of 31.4 nm.

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Section: Resultsmentioning

confidence: 61%

Solvent‐Triggered Reversible Phase Changes in Two Manganese‐Based Metal–Organic Frameworks and Associated Sensing Events

Huang

Zhang

Yue

et al. 2018

Chemistry A European J

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“…The design and synthesis of metal-organic frameworks (MOFs) have attractedconsiderableattention becauseoftheir potentialapplications as functional materials as well as their structural diversity and intriguing variety of topologies [1][2][3][4][5]. Among the various ligands, Isophthalic acid (H 2 isop) and its derivatives with special conformations, such as with a120°angle between two carboxylic groups, have been extensively used to prepare avariety of coordination polymers in virtue of the robust and versatile coordination capability of carboxylates.…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of catena-(5-bromoisophthalate)manganese(II)-[1,4-bis- (imidazol-1-ylmethyl)ben zene], [Mn(C7H3O4Br)(C14H14N4)]n, C22H17BrMnN4O4

Ju²

2012

Zeitschrift für Kristallographie - New Crystal Structures

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Source of material DiscussionThe construction of metal-organic frameworks (MOFs) has becomeanexciting and expanding approach to novel materials. The design and synthesis of metal-organic frameworks (MOFs) have attractedconsiderableattention becauseoftheir potentialapplications as functional materials as well as their structural diversity and intriguing variety of topologies [1][2][3][4][5]. Among the various ligands, Isophthalic acid (H 2 isop) and its derivatives with special conformations, such as with a120°angle between two carboxylic groups, have been extensively used to prepare avariety of coordination polymers in virtue of the robust and versatile coordination capability of carboxylates. 5-bromoisophthalate (5-Br-H 2 ip), mayserve as asuitable building block to construct novel coordination polymers due to the existence of anoncoordinating electron-withdrawing Br-group on the aromatic backbone, which will have aprofound impact on the electron density of such aligand and therefore different physical and chemical properties [6][7]. On the other hand, the flexible bis-(N-containing heterocyclic ring) ligands containing 1-or 2-substituted tetrazole, 1-substituted imidazole, benzimidazole, benzotriazole or 1,2,3-triazole, and 1-or 4-substituted 1,2,4-triazole rings tethered by an alkyl spacer have been extensivelyused [8][9]. In this paper, we select 5-bromoisophthalate and 1,4-bis-(imidazol-1-ylmethyl)benzene (bix) to react with Mn(II) ions to obtain anew MOFs. The X-ray structural analysis shows that the title complex crystallizes in the triclinic system,space group P1.The structure of the title complex consists of a2 Dn etwork containing noncentrosymmetric dinuclear Mn units as nodes.The asymmetric structure unit of the title complex consists of aMn(II) ion, a5-Br-ip ligand, and abix ligand (figure, top

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“…The design and synthesis of metal-organic frameworks (MOFs) have attracted considerable attention because of their potential applications as functional materials as well as their structural diversity and intriguing variety of topologies [1][2][3][4][5][6][7]. It is well known that carboxylate ligands play an important role in coordination chemistry, which may adopt diverse binding modes such as monodentate, chelating, and bridging in the syn-syn, syn-anti, and anti-anti configurations [8][9].…”

Section: Discussionmentioning

confidence: 99%

Crystal structure of catena-poly[(4-bromoisophthalato-κ2O:O')-[1,1'-(1,3- propanediyl)bis(benzimidazole-κ2N:N')cobalt(II)], C25H19BrCoN4O4

Wang

Zhang

2015

Zeitschrift Für Kristallographie - New Crystal Structures

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Source of materialThe title compound was prepared under the hydrothermal conditions. A mixture of 4-bromoisophthalate (4-Br-H 2 ip, 0.1 mmol), 1,1'-(1,3-propanediyl)bis(benzimidazole) (pbbm, 0.1 mmol) and Co(OAc) 2 ×4H 2 O (0.1 mmol) in distilled water (15 mL) was stirred for 30 min, and the pH value of the solution was adjusted to about 4 with 1 M KOH. After stirring for another 30 min, the mixture was transferred to a 25 mL Teflon-lined stainless steel vessel and heated at 120°C for 3 days. Then the reaction system was cooled to room temperature over 24 h, and red block crystals were obtained. DiscussionThe design and synthesis of metal-organic frameworks (MOFs) have attracted considerable attention because of their potential applications as functional materials as well as their structural diversity and intriguing variety of topologies [1][2][3][4][5][6][7]. It is well known that carboxylate ligands play an important role in coordination chemistry, which may adopt diverse binding modes such as monodentate, chelating, and bridging in the syn-syn, syn-anti, and anti-anti configurations [8][9]. On the other hand, the flexible bis(N-containing heterocyclic ring) ligands containing 1-or 2-substituted tetrazole, 1-substituted imidazole, benzimidazole, benzotriazole or 1,2,3-triazole, and 1-or 4-substituted 1,2,4-triazole rings tethered by an alkyl spacer have been extensively used [10][11]. In this paper, we select 4-bromoisophthalate (4-Br-H 2 ip) and 1,1'-(1,3-propanediyl)bis(benzimidazole) (pbbm) to react with Co(II) ions to obtain a new MOF. The asymmetric unit of the title structure consists of a Co(II) ion, a 4-Br-ip ligand, and a pbbm ligand (figure, top). The Co(II) ion adopts a distorted tetrahedral coordination geometry, coordinating to two carboxylic O atoms from two 4-Br-ip ligands (Co1-O1 = 1.929(3) Å and Co1-O3A = 1.950(3) Å) and two N atoms from two pbbm ligands (Co1-N1 = 2.014(3) Å and Co1-N4A = 2.034(3) Å). The title complex displays an interesting infinite 1D looped chains structure composed of two kinds of rings, the 16-membered ring and the 20-membered ring (figure, bottom). The 16-membered ring is formed by two 4-Br-ip ligands bridging two Co(II) ions and the Co(II)×××Co(II) distance is 6.903 Å. The 20-membered ring is made up of two pbbm ligands bridging two Co(II) ions and the Co(II)×××Co(II) distance is 10.206 Å. The two rings are connected alternately via Co(II) ions forming an infinite 1-D chain. Moreover, the adjacent looped chains are linked through hydrogen bonds by weak intermolecular C-H×××O hydrogen bonds to generate a three-dimensional network. The bond lengths and angles of these weak hydrogen bonding parametres are in the range of 3.278(6) -3.345(6) Å and 142-174°, respectively. The pbbm ligand adopts a bidentate-bridging conformation mode with the dihedral angle between the two benzimidazole rings of 62.94°.

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Destruction and reconstruction of the robust [Cu2(OOCR)4] unit during crystal structure transformations between two coordination polymers

Abstract: This work first demonstrates that the robust [Cu(2)(OOCR)(4)] unit can be destroyed and reconstructed in the solid state, as observed in water-induced structural interconversion of two distinct coordination polymers with 5-bromonicotinate.

Cited by 87 publications

References 39 publications

Solvent‐Triggered Reversible Phase Changes in Two Manganese‐Based Metal–Organic Frameworks and Associated Sensing Events

Solvent‐Triggered Reversible Phase Changes in Two Manganese‐Based Metal–Organic Frameworks and Associated Sensing Events

Crystal structure of catena-(5-bromoisophthalate)manganese(II)-[1,4-bis- (imidazol-1-ylmethyl)ben zene], [Mn(C7H3O4Br)(C14H14N4)]n, C22H17BrMnN4O4

Crystal structure of catena-poly[(4-bromoisophthalato-κ2O:O')-[1,1'-(1,3- propanediyl)bis(benzimidazole-κ2N:N')cobalt(II)], C25H19BrCoN4O4

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