scholarly journals Cu and Zn Substituted Silicon Clathrates with the Cubic Type-II Structure: Synthesis and Characterization of Cs8 Na16 Cu3.8 Si132.2 and Cs8 Na16 Zn6.9 Si129.1

2017 ◽  
Vol 643 (23) ◽  
pp. 1874-1880 ◽  
Author(s):  
Marion C. Schäfer ◽  
Svilen Bobev
Keyword(s):  
Synthesis And Characterization ◽  
Type Ii ◽  
Silicon Clathrates ◽  
Structure Synthesis ◽  
Cu And Zn

New peripherally substituted lutetium mono and bis phthalocyanines: Synthesis and comparative photophysical and photochemical properties

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1542-1550
Author(s):  
Nagihan Kocaağa ◽  
Öznur Dülger Kutlu ◽  
Ali Erdoğmuş
Keyword(s):  
Mass Spectrometry ◽  
Photodynamic Therapy ◽  
Singlet Oxygen ◽  
Photophysical Properties ◽  
Quantum Yields ◽  
Synthesis And Characterization ◽  
Type Ii ◽  
H Nmr ◽  
Photochemical Properties

In this study, the synthesis and characterization of mono-(phthalocyaninato) lutetium(III) (1-Cl and 1-F) [Lu[Formula: see text](AcO)(Pc)] (Pc [Formula: see text] phthalocyaninato, AcO [Formula: see text] acetate) and bis-(phthalocyaninato) lutetium(III) (2-Cl and 2-Br) [Lu[Formula: see text]Pc[Formula: see text]] bearing halogenated (F, Cl and Br) phenoxy–phenoxy groups are described and verified by IR, [Formula: see text]H-NMR, UV-vis and mass spectrometry. Photochemical and photophysical properties of 1-F, 1-Cl 2-Cl and 2-Br in DMSO are also presented. A comparison between photophysical and photochemical parameters of mono and bis derivatives showed that mono phthalocyanines are better photosensitizers than bis phthalocyanines. Photophysical and photochemical properties of phthalocyanines are very useful for photodynamic therapy applications. Singlet oxygen quantum yields [Formula: see text] give an indication of the potential of the complexes as photosensitizers in photodynamic therapy applications. The chloro, fluoro, bromo-phenoxy–phenoxy substituted mono-(phthalocyaninato) lutetium(III) complexes (1-Cl and 1-F) gave good singlet oxygen quantum yields (from 0.86 to 0.80) in DMSO. Thus, these complexes show potential as Type II photosensitizers for PDT of cancer.

New Crystal Structure: Synthesis and Characterization of Hexagonal Wurtzite MnO

2012 ◽  
Vol 134 (20) ◽  
pp. 8392-8395 ◽  
Author(s):  
Ki Min Nam ◽  
Yong-Il Kim ◽  
Younghun Jo ◽  
Seung Mi Lee ◽  
Bog G. Kim ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Synthesis And Characterization ◽  
Structure Synthesis

scholarly journals Synthesis and Characterization of Type II ZnSe/CdS Core/Shell Nanocrystals

2008 ◽  
Vol 112 (25) ◽  
pp. 9301-9307 ◽  
Author(s):  
Alexander Nemchinov ◽  
Maria Kirsanova ◽  
Nishshanka N. Hewa-Kasakarage ◽  
Mikhail Zamkov
Keyword(s):  
Synthesis And Characterization ◽  
Core Shell ◽  
Type Ii

scholarly journals Synthesis and Characterization of Novel Ti3SiC2 Reinforced Ni-Matrix Multilayered Composite-Based Solid Lubricants

Lubricants ◽  
2019 ◽  
Vol 7 (12) ◽  
pp. 110 ◽  
Author(s):  
Quan Tran ◽  
Matt Fuka ◽  
Maharshi Dey ◽  
Surojit Gupta
Keyword(s):  
Solid Lubricants ◽  
Sem Analysis ◽  
Interfacial Reactions ◽  
Synthesis And Characterization ◽  
Type I ◽  
Type Ii ◽  
Parallel Orientation ◽  
Perpendicular Orientation ◽  
Laminate Thickness

We report the synthesis and characterization of two different types of Ni-based laminated composites (Types I and II). In Type-I composites, layers of Ni and Ti3SiC2 (Ni–Ti3SiC2) were interleaved with Ni, whereas in Type-II composites, Ni–Ti3SiC2 layers were interleaved with Al and Ni. The laminate thickness and Ti3SiC2 content in the individual Ni–Ti3SiC2 layers were systematically varied in both the composites. Detailed SEM studies showed that Ti3SiC2 particulates are well distributed in the Ni-matrix with little or no interfacial reactions with interparticle porosity. However, there were interfacial reactions between Ni and Al in Type II composites. In general, Type I multilayered composites had higher ultimate compressive strength (UCS) in parallel orientation as compared to perpendicular orientation (layers are aligned parallel or perpendicular to the wear surface then it will be referred to as parallel or perpendicular orientation). Comparatively, in Type II composites, the UCS was greater in perpendicular orientation as compared to parallel due to the presence of Al layers as bonding layers. Both the composite designs showed triboactive behavior against alumina disks and sensitivity to laminate thickness and orientation. In Type-I composites, the decrease in µ and wear rate (WR) with laminate thickness was more pronounced in the perpendicular orientation as compared to the parallel orientation. Comparatively, Ni–Ti3SiC2/Al/Ni composites showed that the parallel orientation was more effective in enhancing the triboactive performance. SEM analysis of tribosurfaces showed signs of triboxidation and abrasion, which led to the formation of O-rich tribofilms.

Synthesis and Characterization of Cu(II), Zn(II) Dendritic Metal Complexes

2010 ◽  
Vol 160-162 ◽  
pp. 529-535 ◽  
Author(s):  
Jun Wang ◽  
Peng Zhang ◽  
Shuai Chen ◽  
Cui Qin Li
Keyword(s):  
Hydrogen Bond ◽  
Metal Complexes ◽  
Elemental Analysis ◽  
Molecular Hydrogen ◽  
Stable Structure ◽  
Synthesis And Characterization ◽  
Molecular Hydrogen Bond ◽  
Schiff Reaction ◽  
Cu And Zn

A new kind of dendritic-salicylaldehydeimine ligand was synthesized with 1.0G polyamidoamine and salicylaldehyde through schiff reaction, and further formed two kinds of dendritic metal complexes by complexing Cu and Zn. The dendritic-salicylaldehydeimine ligand and its metal complexes were characterized by elemental analysis, IR, NMR and UV. The results indicate that two kinds of dendritic metal complexes with stable structure have been synthesized by complexing Cu and Zn, the yield were 88.2% and 65.2% respectively; Intra-molecular hydrogen bond between the hydroxyl H atom of ph-OH and the N atom of >C=N- has been formed in the ligand; The structures of complexes agree well with the theory.

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