New 3-D polyoxovanadoborate architectures based on [V12B18O60]16− clusters

Zhou, Jian; Liu, Xing; Chen, Rong; Xiao, Hong‐Ping; Hu, Feilong; Zou, Hua‐Hong; Zhou, Yun; Liu, Chun; Zhu, Ligang

doi:10.1039/c3ce40428e

Cited by 33 publications

(40 citation statements)

References 26 publications

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“…The χT values at 300 and 2 K for the abovementioned compounds are listed in Table 6. (11) for both atoms) [55]. However, when the χT value of the three uncoupled Cu II centers is subtracted (g = 2.00), the resultant χT value for the [V12B18O60] polyanion of (11) is 3.68 emu K mol −1 , thus presenting the same trend followed by (5), (12), (15), (18), (19), and (27) (Figure 6).…”

Section: Magnetic Propertiesmentioning

confidence: 62%

“…Among all the studied compounds included in this review, the magnetic properties of only (5), (11), (12), (15), (18), (19), (27), and (38) have been reported [53][54][55]57,63]. All of these systems have a mixed valence ratio of 10V IV /2V V , and present a bulk antiferromagnetic behavior.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

“…In general, the two absorption bands in the high energy region are assigned as O→V and O→B charge transfer transitions, respectively. The less intense band in the low energy region has been assigned to Intervalence Charge Transfer Transitions (IVCT) and to d-d transitions [34,48,[52][53][54][55]57,58,63,67]. With respect to the low energy absorption bands (ca.…”

Section: Coordination Geometry Analysis Of the Counterbalancing Alkalmentioning

confidence: 99%

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Structural and Electronic Properties of Polyoxovanadoborates Containing the [V12B18O60] Core in Different Mixed Valence States

et al. 2015

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Abstract:This review summarizes all published data until April 2015 related to crystalline lattices formed by the [V12B18O60] core, which generates polyanionic clusters with different degrees of protonation and mixed-valence ratios. The negative charge of this cluster is counterbalanced by different cations such as protonated amines, hydronium, and alkaline, and transition metal ions. The cluster is shown to form extended 1D, 2D, or 3D frameworks by forming covalent bonds or presenting hydrogen bond interactions with the present secondary cations. These cations have little influence on the solid state reflectance UV-visible spectra of the polyanionic cluster, but are shown to modify the FT-IR spectra and the magnetic behavior of the different reported species. OPEN ACCESSInorganics 2015, 3 310

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Section: Magnetic Propertiesmentioning

confidence: 62%

Section: Magnetic Propertiesmentioning

confidence: 99%

Section: Coordination Geometry Analysis Of the Counterbalancing Alkalmentioning

confidence: 99%

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Structural and Electronic Properties of Polyoxovanadoborates Containing the [V12B18O60] Core in Different Mixed Valence States

et al. 2015

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“…Abstract: A new porous vanadoborate was synthesized by employing the scale chemistry theory with the vanadoborate cluster V 10 B 28 . The twofold interpenetrated lvt network was assembled with zinc-containing elliptical vanadoborate clusters and Zn polyhedra.…”

Section: Dedicated To Professor Xiaodong Zou On the Occasion Of Her 5mentioning

confidence: 99%

“…Although these clusters were discovered decades ago, few 3D framework structures have been reported in which they were used as building units. [27,28] In our previous study, we succeeded in linking V 12 B 18 to form the 3D framework SUT-6.[29] The V 12 B 18 cluster in SUT-6 has D 3d point-group symmetry and prefers a six-coordinated net (hxg in SUT-6). This high coordination number of V 12 B 18 makes its surround- …”

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confidence: 99%

Construction of Mesoporous Frameworks with Vanadoborate Clusters

Chen

Bacsik

et al. 2014

Angewandte Chemie

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A new porous vanadoborate was synthesized by employing the scale chemistry theory with the vanadoborate cluster V 10 B 28 . The twofold interpenetrated lvt network was assembled with zinc-containing elliptical vanadoborate clusters and Zn polyhedra. The single lvt framework contains a three-dimensional 38 38 20 ring channel system with the pore size (24.7 12.7 ) reaching the mesoscale, thus indicating the possibility of constructing 3D ordered mesopores with vanadoborate clusters. The porosity of the SUT-7 structure was confirmed by CO 2 adsorption of the as-synthesized materials.Crystalline inorganic materials including micro-or/and mesopores are of great importance because of their diverse channel systems and wide applications in adsorption, catalysis, and separation. [1][2][3][4] Mesoporous crystalline materials with a channel size above 2 nm are of special interest as the enlargement of the pores can enhance the diffusion of large organic molecules into the pores when the materials are used as catalysts or supports. However, there are only a few inorganic examples reported with such mesopores, such as ITQ-43[5] (a 28-ring germanium silicate), SU-M, [6] JLG-12 [7] (a 30-ring germanate), ITQ-37 [8] (a 30-ring germanium silicate), and NTHU-13, [9] a series of gallium zincophosphites with ring sizes from 24-ring to 72-ring. Compared to the metal-organic frameworks (MOFs), where the pore size can be expanded and designed in a more rational way through reticular chemistry [4,10] or modular chemistry, [11,12] the expansion of the pore size in the inorganic crystalline materials is much slower. Several strategies [9,13] have been proposed to circumvent this challenge. Müller et al. [14] and Khan [15] introduced linkages between isolated cluster compounds to create porosity, while FØrey [16,17] proposed the scale chemistry method and predicted that the larger the structure building unit (SBU), the larger the pores. Very recently, Wang and coworkers [9] demonstrated that the channels in the phosphate framework can be successfully expanded by using templates with longer carbon chains. Of these three strategies, the first two are very successful with cluster-based building units, such as the germanates. [7,18] Vanadoborates are interesting compounds assembled from vanadoborate clusters. Four types of vanadoborate clusters and their derivatives with different connections of VO 5 and BO 3 /BO 4 polyhedra are mainly reported: V 6 B 20 , [19,20] V 10 B 28 , [21,22] V 12 B 18 , [23][24][25] and V 12 B 16 [23, 26, 27] ( Figure 1). Although these clusters were discovered decades ago, few 3D framework structures have been reported in which they were used as building units. [27,28] In our previous study, we succeeded in linking V 12 B 18 to form the 3D framework SUT-6.[29] The V 12 B 18 cluster in SUT-6 has D 3d point-group symmetry and prefers a six-coordinated net (hxg in SUT-6). This high coordination number of V 12 B 18 makes its surround-

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