Unconventional mesoporous single crystalline NiO by synergistically controlled evaporation and hydrolysis

2017 ◽  
Vol 5 (45) ◽  
pp. 23840-23843 ◽  
Author(s):  
Hao Wu ◽  
Jing Geng ◽  
Peng Han ◽  
Hongtao Ge ◽  
Abdullah M. Alenizi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Metal Ion ◽  
Solvent Evaporation ◽  
Single Crystalline ◽  
Metal Ion Hydrolysis

Mesoporous single-crystal NiO was synthesized by controlling metal ion hydrolysis and solvent evaporation rates, exhibiting excellent electrochemical activities.

scholarly journals Pyrene Carboxylate Ligand Based Coordination Polymers for Microwave-Assisted Solvent-Free Cyanosilylation of Aldehydes

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1101
Author(s):  
Anirban Karmakar ◽  
Anup Paul ◽  
Elia Pantanetti Sabatini ◽  
M. Fátima C. Guedes da Silva ◽  
Armando J. L. Pombeiro
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
Coordination Polymers ◽  
Metal Ion ◽  
Solvent Free ◽  
Lewis Acidity ◽  
Carboxylate Ligand ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microwave Assisted

The new coordination polymers (CPs) [Zn(μ-1κO1:1κO2-L)(H2O)2]n·n(H2O) (1) and [Cd(μ4-1κO1O2:2κN:3,4κO3-L)(H2O)]n·n(H2O) (2) are reported, being prepared by the solvothermal reactions of 5-{(pyren-4-ylmethyl)amino}isophthalic acid (H2L) with Zn(NO3)2.6H2O or Cd(NO3)2.4H2O, respectively. They were synthesized in a basic ethanolic medium or a DMF:H2O mixture, respectively. These compounds were characterized by single-crystal X-ray diffraction, FTIR spectroscopy, thermogravimetric and elemental analysis. The single-crystal X-ray diffraction analysis revealed that compound 1 is a one dimensional linear coordination polymer, whereas 2 presents a two dimensional network. In both compounds, the coordinating ligand (L2−) is twisted due to the rotation of the pyrene ring around the CH2-NH bond. In compound 1, the Zn(II) metal ion has a tetrahedral geometry, whereas, in 2, the dinuclear [Cd2(COO)2] moiety acts as a secondary building unit and the Cd(II) ion possesses a distorted octahedral geometry. Recently, several CPs have been explored for the cyanosilylation reaction under conventional conditions, but microwave-assisted cyanosilylation of aldehydes catalyzed by CPs has not yet been well studied. Thus, we have tested the solvent-free microwave-assisted cyanosilylation reactions of different aldehydes, with trimethylsilyl cyanide, using our synthesized compounds, which behave as highly active heterogeneous catalysts. The coordination polymer 1 is more effective than 2, conceivably due to the higher Lewis acidity of the Zn(II) than the Cd(II) center and to a higher accessibility of the metal centers in the former framework. We have also checked the heterogeneity and recyclability of these coordination polymers, showing that they remain active at least after four recyclings.

Facile growth of centimeter-sized single-crystal graphene on copper foil at atmospheric pressure

2015 ◽  
Vol 3 (15) ◽  
pp. 3530-3535 ◽  
Author(s):  
Jing Li ◽  
Xuan-Yun Wang ◽  
Xing-Rui Liu ◽  
Zhi Jin ◽  
Dong Wang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Flow Rate ◽  
Atmospheric Pressure ◽  
Copper Foil ◽  
Gas Flow ◽  
Gas Flow Rate ◽  
Single Crystalline ◽  
Slowing Down ◽  
Cu Foil

By mildly oxidizing Cu foil and slowing down the gas flow rate, centimeter-sized single-crystalline graphene was grown on Cu at atmospheric pressure.

scholarly journals Interface engineering strategies towards Cs2AgBiBr6 single-crystalline photodetectors with good Ohmic contact behaviours

2020 ◽  
Vol 8 (1) ◽  
pp. 276-284 ◽  
Author(s):  
Yangyang Dang ◽  
Guoqing Tong ◽  
Wentao Song ◽  
Zonghao Liu ◽  
Longbin Qiu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Ohmic Contact ◽  
Interface Engineering ◽  
Single Crystalline ◽  
Ag Electrodes ◽  
Room Condition ◽  
Photo Response

Cs2AgBiBr6 single crystal photodetectors using Ag electrodes under different wavelength at room condition showed the excellent photo-response with Ohmic-contact among the different electrodes (Au, Ag and Al).

Growth of Ultrathin Single-Crystalline IrO2(110) Films on a TiO2(110) Single Crystal

Langmuir ◽  
2019 ◽  
Vol 35 (24) ◽  
pp. 7720-7726 ◽  
Author(s):  
Marcel J. S. Abb ◽  
Tim Weber ◽  
Lorena Glatthaar ◽  
Herbert Over
Keyword(s):  
Single Crystal ◽  
Single Crystalline

Synthesis and electrical properties of single crystalline black phosphorus nanoribbons

CrystEngComm ◽  
2020 ◽  
Vol 22 (22) ◽  
pp. 3824-3830 ◽  
Author(s):  
Ying Yu ◽  
Jiadong Yao ◽  
Xinyue Niu ◽  
Boran Xing ◽  
Yali Liu ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Single Crystal ◽  
Chemical Vapor ◽  
Black Phosphorus ◽  
Vapor Transport ◽  
Chemical Vapor Transport ◽  
Single Crystalline ◽  
Zigzag Direction

Single crystal black phosphorus nanoribbons along the zigzag direction have been successfully grown by chemical vapor transport.

scholarly journals Single crystalline hollow metal–organic frameworks: a metal–organic polyhedron single crystal as a sacrificial template

2015 ◽  
Vol 51 (17) ◽  
pp. 3678-3681 ◽  
Author(s):  
Hyehyun Kim ◽  
Minhak Oh ◽  
Dongwook Kim ◽  
Jeongin Park ◽  
Junmo Seong ◽  
...  
Keyword(s):  
Single Crystal ◽  
Metal Organic Frameworks ◽  
Hard Template ◽  
Single Crystalline ◽  
Sacrificial Template ◽  
Metal Organic ◽  
Hollow Metal

Single crystalline hollow MOFs with cavity dimensions on the order of several micrometers and hundreds of micrometers were prepared using a metal–organic polyhedron single crystal as a sacrificial hard template.

OPTICAL REFLECTIVITY STUDY ON THE SINGLE CRYSTALLINE (La1−xSrx)2CuO4

1988 ◽  
Vol 01 (09n10) ◽  
pp. 353-361 ◽  
Author(s):  
S. TAJIMA ◽  
S. UCHIDA ◽  
H. ISHII ◽  
H. TAKAGI ◽  
S. TANAKA ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Energy Range ◽  
Single Crystal ◽  
Phonon Spectrum ◽  
Wide Energy Range ◽  
Phonon Modes ◽  
Single Crystalline ◽  
Optical Reflectivity ◽  
Reflectivity Spectra ◽  
Wide Energy

The optical reflectivity spectra were measured for single crystalline La2CuO4 and La1.8Sr0.2CuO4 over a wide energy range from 12meV to 3eV. Comparing the phonon spectrum of single crystal with that of polycrystal, the observed four phonon modes can be classified into the two—the vibrations parallel and perpendicular to the c-axis. The infrared spectrum of La1.8Sr0.2CuO4 shows the normal Drude-type behavior without any extra excitation.

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