A Platinum Molecular Complex Immobilised on the Surface of Graphene as Active Catalyst in Alkyne Hydrosilylation

Controlled bottom-up synthesis of amorphous coordination polymers with tailored metal coordination is a research field in its infancy. In this study, synthesis control was achieved to selectively prepare one-dimensional (1D)...

Download Full-text

Polymer Optical Waveguide Sensor Based on Fe-Amino-Triazole Complex Molecular Switches

Polymers ◽

10.3390/polym13020195 ◽

2021 ◽

Vol 13 (2) ◽

pp. 195

Author(s):

Muhammad Shaukat Khan ◽

Hunain Farooq ◽

Christopher Wittmund ◽

Stephen Klimke ◽

Roland Lachmayer ◽

...

Keyword(s):

Molecular Complex ◽

Electromagnetic Interference ◽

Optical Power ◽

Uv Curing ◽

Molecular Complexes ◽

Core Material ◽

Absorption Bands ◽

Electronic Temperature ◽

Polymer Waveguide ◽

Temperature Detection

We report on a polymer-waveguide-based temperature sensing system relying on switchable molecular complexes. The polymer waveguide cladding is fabricated using a maskless lithographic optical system and replicated onto polymer material (i.e., PMMA) using a hot embossing device. An iron-amino-triazole molecular complex material (i.e., [Fe(Htrz)2.85(NH2-trz)0.15](ClO4)2) is used to sense changes in ambient temperature. For this purpose, the core of the waveguide is filled with a mixture of core material (NOA68), and the molecular complex using doctor blading and UV curing is applied for solidification. The absorption spectrum of the molecular complex in the UV/VIS light range features two prominent absorption bands in the low-spin state. As temperature approaches room temperature, a spin-crossover transition occurs, and the molecular complex changes its color (i.e. spectral properties) from violet-pink to white. The measurement of the optical power transmitted through the waveguide as a function of temperature exhibits a memory effect with a hysteresis width of approx. 12 °C and sensitivity of 0.08 mW/°C. This enables optical rather than electronic temperature detection in environments where electromagnetic interference might influence the measurements.

Download Full-text

Synthesis of Silsesquioxanes with Substituted Triazole Ring Functionalities and Their Coordination Ability

Molecules ◽

10.3390/molecules26020439 ◽

2021 ◽

Vol 26 (2) ◽

pp. 439

Author(s):

Monika Rzonsowska ◽

Katarzyna Kozakiewicz ◽

Katarzyna Mituła ◽

Julia Duszczak ◽

Maciej Kubicki ◽

...

Keyword(s):

Ligand Binding ◽

Molecular Complex ◽

Coordination Compounds ◽

Triazole Ring ◽

Spectroscopic Characterization ◽

Process Conditions ◽

Double Decker ◽

Triazole Ligand ◽

Coordination Ability ◽

High Yields

A synthesis of a series of mono-T8 and difunctionalized double-decker silsesquioxanes bearing substituted triazole ring(s) has been reported within this work. The catalytic protocol for their formation is based on the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) process. Diverse alkynes were in the scope of our interest—i.e., aryl, hetaryl, alkyl, silyl, or germyl—and the latter was shown to be the first example of terminal germane alkyne which is reactive in the applied process’ conditions. From the pallet of 15 compounds, three of them with pyridine-triazole and thiophenyl-triazole moiety attached to T8 or DDSQ core were verified in terms of their coordinating properties towards selected transition metals, i.e., Pd(II), Pt(II), and Rh(I). The studies resulted in the formation of four SQs based coordination compounds that were obtained in high yields up to 93% and their thorough spectroscopic characterization is presented. To our knowledge, this is the first example of the DDSQ-based molecular complex possessing bidentate pyridine-triazole ligand binding two Pd(II) ions.

Download Full-text

Designing heterostructurated core@satellites Prussian Blue Analogue@Au-Ag nanoparticles: effect on the magnetic properties and catalytic activity

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00008j ◽

2021 ◽

Author(s):

Ekaterina Mamontova ◽

María Rodríguez-Castillo ◽

Erwan Oliviero ◽

Yannick Guari ◽

Joulia Larionova ◽

...

Keyword(s):

Magnetic Properties ◽

Catalytic Activity ◽

Prussian Blue ◽

Molecular Complex ◽

Ag Nanoparticles ◽

Prussian Blue Analogue

We report in this article new magneto-plasmonic core@satellites Prussian Blue Analogue (PBA)@Au-Ag nanoheterostructures obtained by using a post-synthetic impregnation of a bimetallic [AuI2AgI2(C6F5)4(OEt2)2]n molecular complex with the ferromagnetic K+/Ni2+/[Cr(CN)6]3− PBA...

Download Full-text

Effective removal of Cd2+, Zn2+ by immobilizing the non-absorbent active catalyst by packed bed column reactor for industrial wastewater treatment

Chemosphere ◽

10.1016/j.chemosphere.2021.130230 ◽

2021 ◽

pp. 130230

Author(s):

Sandhanasamy Devanesan ◽

Mohamad S. AlSalhi

Keyword(s):

Wastewater Treatment ◽

Industrial Wastewater ◽

Active Catalyst ◽

Packed Bed ◽

Packed Bed Column ◽

Industrial Wastewater Treatment ◽

Column Reactor ◽

Effective Removal

Download Full-text

Co3O4-CuCoO2 hybrid nanoplates as a low-cost and highly active catalyst for producing hydrogen from ammonia borane

New Journal of Chemistry ◽

10.1039/d0nj05524g ◽

2021 ◽

Author(s):

Yufa Feng ◽

Jinyun Liao ◽

Xiaodong Chen ◽

Qingyu Liao ◽

Huize Wang ◽

...

Keyword(s):

Fuel Cell ◽

Active Catalyst ◽

Low Cost ◽

Ammonia Borane ◽

Catalytic Materials ◽

Highly Active ◽

Promising Strategy

Developing low-cost and highly active hydrolysis catalytic materials for the dehydrogenation of hydrogen-rich chemicals is a promising strategy to store and easily release hydrogen for fuel cell applications. In this...

Download Full-text