Pseudotetrahedral Organotin-Capped Chalcogenidometalate Supermolecules with Optical Limiting Performance.

The rational design of crystalline clusters with adjustable compositions and dimensions is highly sought after but quite challenging as it is important to understand their structural evolution processes and to systematically establish structure-property relationships. Herein, a family of organotin-based sulfidometalate supertetrahedral clusters has been prepared via mixed metal and organotin strategies at low temperatures (60-120 °C). By engineering the metal composition, we can effectively control the size of the clusters, which ranges from 8 to 35, accompanied by variable configurations: P1-[(RSn)MS], T3-[(RSn)InMS] (R = butyl-Bu and phenyl-Ph; M = Cd, Zn, and Mn), T4-[(BuSn)InCuS], truncated P2, viz.

Superhydrophobic Pseudosupertetrahedral Sulfido Metalate Clusters for Constructing Liquid Marbles.

One pseudopentasupertetrahedral chalcogenidometalate cluster, [(BuSn)SnCdS(OH)]·6(HDMP) (PPS-1; HDMP = protonated 3,5-dimethylpiperidine), has been isolated by use of an organotin precursor. They are arranged to generate two types of tetrahedrally patterned cages, which further interconnect to form a diamond network. Owing to the covalent attachment of abundant alkyl groups, PPS-1 exhibits excellent hydrophobicity and could be used as an assembly substance for building liquid marbles.

Modification of metallic and non-metallic sites in pentasupertetrahedral chalcogenidometalate clusters for third-order nonlinear optical response.

Four isomorphic P2 chalcogenide clusters named [SnInCuS]·11(HDBU) (1) (DBU = 1,8-diazabicyclo[5.4.0] undec-7-ene), [SnInCuSe]·6(HDMAPA)·2(DMAPA)·9EG (2) (DMAPA = 3-dimethylaminopropylamine, EG = ethylene glycol), [SnInCuSO]·6[HPMDETA]·10EG (3) (PMDETA = pentamethyldiethylenetriamine), [SnGaCuSO]·6(HDMAPA)·7EG (4) have been isolated organotin precursor and mixed-metal strategy.

Photochemical In Situ Exfoliation of Metal-Organic Frameworks for Enhanced Visible-Light-Driven CO Reduction.

Two novel two-dimensional metal-organic frameworks (2D MOFs), 2D-M TCPE (M=Co or Ni, TCPE=1,1,2,2-tetra(4-carboxylphenyl)ethylene), which are composed of staggered (4,4)-grid layers based on paddlewheel-shaped dimers, serve as heterogeneous photocatalysts for efficient reduction of CO to CO. During the visible-light-driven catalysis, these structures undergo in situ exfoliation to form nanosheets, which exhibit excellent stability and improved catalytic activity. The exfoliated 2D-M TCPE nanosheets display a high CO evolution rate of 4174 μmol g  h and high selectivity of 97.

Tin-oxychalcogenide supertetrahedral clusters maintained in a MTN zeolite-analog arrangement by coulombic interactions.

Two crystalline salts, T3-SnOX-MTN (X = S/Se, MTN denotes a defined zeotype), both spatially assembled in an MTN net, have been fabricated. This was achieved by interlinking the isolated tin-oxychalcogenide tetrahedrally shaped clusters of T3-[Sn10O8X16]8- (X = S/Se) through coulombic interactions with protonated organic amine templates. T3-SnOX-MTN (X = S/Se), with 74.

Soluble Supertetrahedral Chalcogenido T4 Clusters: High Stability and Enhanced Hydrogen Evolution Activities.

The discrete supertetrahedral chalcogenido T n clusters can be regarded as a type of quantum dot (QD) with precise structure and uniform size. They were commonly studied in the solid state because of their poor solubility or highly negative charge that leads to instability in common solvents. These drawbacks limit their potential applications as efficient photocatalysts.

A clean and general strategy to decorate a titanium metal-organic framework with noble-metal nanoparticles for versatile photocatalytic applications.

We demonstrate a facile and general approach for the fabrication of highly dispersed Au, Pd, and Pt nanoparticles (NPs) on MIL-125(Ti) without using extra reducing and capping agents. Noble-metal NP formation is directed by an in situ redox reaction between the reductive MIL-125(Ti) with Ti(3+) and oxidative metal salt precursors. The resulting composites function as efficient photocatalysts.

Electronic effects of ligand substitution on metal-organic framework photocatalysts: the case study of UiO-66.

UiO-66-X (X = H, NH2, NO2, Br) have been successfully synthesized and tested for their photocatalytic activity in water treatment. Results show that electronic effect of the ligand substituents greatly affects the photocatalytic activity of UiO-66. The rates obtained by different substituents are linearly correlated with their Hammett coefficients.