Peptide sequence mediated self-assembly of molybdenum blue nanowheel superstructures.

The precise control over the formation of complex nanostructures, polyoxometalates (POMs), at the sub-nanoscale is challenging but critical if non-covalent architectures are to be designed. Combining biologically-evolved systems with inorganic nanostructures could lead to sequence-mediated assembly. Herein, we exploit oligopeptides as multidentate structure-directing ligands metal-coordination and hydrogen bonded interactions to modulate the self-assembly of POM superstructures.

Unprecedented Halide-Ion Binding and Catalytic Activity of Nanoscale Anionic Metal Oxide Clusters.

One halide ion (X ) can bind on the surface of nanoscale Anderson-type polyoxometalate (POMs) clusters [(n-C H ) N] {AlMo O (OH) [(OCH ) CCH ]}, and form stable complexes in solution with binding constant K=1.53×10 . Single-crystal structural analysis showed that this binding behavior occurs through multiple hydrogen bonding between X and three hydroxy groups on the uncapped side of the cluster.

Correction: Diversified polyoxovanadate derivatives obtained by copper(i)-catalysed azide-alkyne cycloaddition reaction: their synthesis and structural characterization.

Correction for 'Diversified polyoxovanadate derivatives obtained by copper(i)-catalysed azide-alkyne cycloaddition reaction: their synthesis and structural characterization' by Hongli Jia et al., Dalton Trans., 2018, 47, 577-584.

A Series of Weakley-type Polyoxomolybdates: Synthesis, Characterization, and Magnetic Properties by a Combined Experimental and Theoretical Approach.

Using DCC as the dehydrating agent, a series of Weakley-type polyoxomolybdates [BuN]{Ln[MoO(OMe)(NO)]} (Ln = Tb, Dy, Ho, Er) were synthesized in a one-pot reaction and structurally characterized by elemental, IR, UV-vis analysis, PXRD, and single-crystal X-ray diffraction. Furthermore, the static and dynamic measurements were utilized to investigate their magnetic performances. Typically, slow relaxation of magnetization was observed for Dy analogues with an energy barrier for the reversal of the magnetization of 50 K, which is the highest barrier height observed on the polyoxomolybdates-based single-molecule magnets (SMMs).

Diversified polyoxovanadate derivatives obtained by copper(i)-catalysed azide-alkyne cycloaddition reaction: their synthesis and structural characterization.

In this work, we confirmed that the copper-catalysed azide-alkyne cycloaddition (CuAAC) reaction is an effective method for the organic-functionalization of polyoxometalates (POMs). Herein, for the first time, four novel 1,2,3-triazole functionalized polyoxovanadate (POV) organic-inorganic hybrids, (BuN)[VO{(OCH)CHNO}]·1.5CHCN 2, (BuN)[VO{(OCH)CHNO}]·2CHCN 3, (BuN)[VO{(OCH)CHN}] 4 and (BuN)[VO{(OCH)CHNCl}] 5 were prepared through the CuAAC reaction using the azide functionalized hexavanadate, (BuN)[VO{(OCH)CCHN}]·2.

Tosylation of alcohols: an effective strategy for the functional group transformation of organic derivatives of polyoxometalates.

Recently, the organic functionalization of polyoxometalates (POMs) has drawn increasing interest, and an easy and effective route to achieve organic derivatives is of great importance. Herein, the first reported synthesis of a tosyl ester derivative of the polyoxometalate (BuN)[VO{(OCH)CCHSOCH}]·2.5CHCN (compound 1) was performed by using DMAP as an activating reagent and triethylamine as an HCl scavenger.

Buildup of Redox-Responsive Hybrid from Polyoxometalate and Redox-Active Conducting Oligomer: Its Self-Assemblies with Controllable Morphologies.

A redox-responsive hybrid of polyoxometalate and conducting oligomer including its self-assemblies with controllable morphologies are reported. To this end, a hybrid molecule, containing a Lindqvist hexamolybdate as the polar head group and N,N'-bis(4'-amino-2,6-dimethylphenyl)-1,4-quinonediimine as the redox-responsive and aggregating group, is prepared. This hybrid exhibits redox-responsive behavior with controllable assembling morphological transition from spherical vesicles to short cylindrical vesicles.

A simple synthetic route to polyoxovanadate-based organic-inorganic hybrids using EEDQ as an ester coupling agent.

A reaction strategy for the post-functionalization of hexavanadate derivatives is presented herein. In this study, five polyoxovanadate-based organic-inorganic hybrids TBA[VO{(OCH)CCOO(CH)CH}] (2), TBA[VO{(OCH)CCOO(CH)CH[double bond, length as m-dash]CH}] (3), TBA[VO{(OCH)CCOOCHCF}] (4), TBA[VO{(OCH)CCOO(CHCHO)CH}] (5), and TBA[VO{(OCH)CCOO(CH)OH}]·2CHCHOH (6) were successfully synthesized via esterification of carboxylic acid groups-containing TBA[VO{(OCH)CCOOH}] (1) with five alcohols possessing different functional groups. These hybrids were characterized by single crystal X-ray diffraction, IR, ESI-MS, H and C-NMR spectroscopies, and elemental analysis.

Degradable Organically-Derivatized Polyoxometalate with Enhanced Activity against Glioblastoma Cell Line.

High efficacy and low toxicity are critical for cancer treatment. Polyoxometalates (POMs) have been reported as potential candidates for cancer therapy. On accounts of the slow clearance of POMs, leading to long-term toxicity, the clinical application of POMs in cancer treatment is restricted.

Label-free colorimetric detection of mercury via Hg(2+) ions-accelerated structural transformation of nanoscale metal-oxo clusters.

Mercury and its compounds are known to be extremely toxic but widely distributed in environment. Although many works have been reported to efficiently detect mercury, development of simple and convenient sensors is still longed for quick analyzing mercury in water. In this work, a nanoscale metal-oxo cluster, (n-Bu4N)2[Mo5NaO13(OCH3)4(NO)], (MLPOM), organically-derivatized from monolacunary Lindqvist-type polyoxomolybdate, is found to specifically react with Hg(2+) in methanol/water via structural transformation.

Aliphatic organoimido derivatives of polyoxometalates containing a bioactive ligand.

A series of aliphatic organoimido derivatives of hexamolybdate based on amantadine, namely (nBu4 N)2 [Mo6 O18 (NC10 H15 )] (1), (nBu4 N)2 {cis-[Mo6 O17 (NC10 H15 )2 ]} (2), (nBu4 N)2 {trans-[Mo6 O17 (NC10 H15 )2 ]} (3), and (nBu4 N)2 [Mo6 O16 (NC10 H15 )3 ] (4), was synthesized in reasonable yield by dehydration with N,N'-dicyclohexylcarbodiimide (DCC). They were characterized by IR and UV/Vis spectroscopy, elemental analysis, ESI mass spectrometry, and single-crystal X-ray structure analysis. The spectral and structural similarities and differences between monosubstituted, cis-disubstituted, and trans-disubstituted organoimido derivatives were elucidated and may provide guidance for related work on organoimido-functionalized Lindqvist-type polyoxometalates.

Spontaneous resolution of polyoxometalate-based inorganic-organic hybrids driven by solvent and common ion.

Three single-sided, triol-functionalized Anderson POM hybrids were successfully synthesized. With suitable solvents and the effect driven by common-ion synergy, enantiopure crystals were obtained when the spontaneous resolution of enantiomers occurred upon crystallization. The chirality of POM-organic hybrids was confirmed by single-crystal X-ray diffraction and solid-state CD spectrum.

A direct anchoring of Anderson-type polyoxometalates in aqueous media with tripodal ligands especially containing the carboxyl group.

Polyoxometalate-based organic-inorganic hybrids were synthesized by direct modification of the parent Anderson cluster with both the traditional tripodal ligand, CH3C(CH2OH)3, and a novel one containing a carboxyl group, CH3C(CH2OH)2(COOH), which was inaccessible from the traditional self-assembly protocol.