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Online since: September 2012
Authors: Stefan Glang, Dorothee Borchmann, Thorsten Rieth, Heiner Detert
Detert*1,d
1Institute for Organic Chemistry, Johannes Gutenberg-University, Mainz, 55099, Germany
astglang@gmx.de, bdeb343@nyu.edu, crietht@students.uni-mainz.de, ddetert@uni-mainz.de
Keywords: discotic liquid crystals, fluorescence, solvatochromism, heterocycles, mesophases
Abstract.
Scheme 1: Synthesis of aryl-substituted tristriazolotriazines Table 1: Structures and properties of aryl-substituted tristriazolotriazines.
The structure of the mesophase of 3 was studied by wide-angle X-ray scattering.
Measurement on a pre-oriented sample at 145 °C showed a disordered hexagonal columnar structure of the LC phase with a column spacing of a = 24.2 Å.
These disc-like molecules can form thermotropic mesophases, a hexagonal columnar structure has been found for TTT 3.
Scheme 1: Synthesis of aryl-substituted tristriazolotriazines Table 1: Structures and properties of aryl-substituted tristriazolotriazines.
The structure of the mesophase of 3 was studied by wide-angle X-ray scattering.
Measurement on a pre-oriented sample at 145 °C showed a disordered hexagonal columnar structure of the LC phase with a column spacing of a = 24.2 Å.
These disc-like molecules can form thermotropic mesophases, a hexagonal columnar structure has been found for TTT 3.
Online since: September 2012
Authors: Isabel Van Driessche, Anne Schwarz, Lieva Van Langenhove, Bram Van Genabet, Els Bruneel, Lina Rambausek
To interconnect components within the system, textile structures need to be equipped with electro-conductive properties.
Therefore, since a decade, textile structures are equipped with conductive properties.
Research groups in Europe focus not only on making the textile structures electro-conductive but also on transferring the textile structure itself into an electronic component.
This structure is the centre of our work.
Figure 1 - Structure of a thin-film transistor on a conductive cylindrical substrate top-contacted and bottom-contacted [1] There are various ways to equip textile structures with conductive properties.
Therefore, since a decade, textile structures are equipped with conductive properties.
Research groups in Europe focus not only on making the textile structures electro-conductive but also on transferring the textile structure itself into an electronic component.
This structure is the centre of our work.
Figure 1 - Structure of a thin-film transistor on a conductive cylindrical substrate top-contacted and bottom-contacted [1] There are various ways to equip textile structures with conductive properties.
Online since: August 2017
Authors: Ampar Chitharanjan Hegde, Akshatha R. Shetty
Shetty and Ampar Chitharanjan Hegde*
Electrochemistry Research Laboratory, Department of Chemistry,
National Institute of Technology Karnataka,
Surathkal, Srinivasnagar-575025, India
*Corresponding author: acrhegde@gmail.com
Keywords: Ni-Co-CNT composite, Hydrogen evolution reaction and Oxygen evolution reaction study.
The structure-property relationship of both Ni-Co and Ni-Co-CNT alloy coatings for HER and OER were used to explain the role of CNT in enhancing electrocatalytic activity, with the support of XRD, SEM and EDX analyses.
The phase structure of binary and composite alloy coatings revealed that diffraction peak of (200) of plane at 43.30 corresponding to fcc structure of NiO(JCPDS 00-047-1049).The peaks at 44.70, 51.80,76.40 corresponding to (111),(200) and (220) crystal planes of fcc Ni structure.
Accordingly, the peak intensity of fcc structure increased.
The coatings found to exhibit peritectic phase structure at higher angles, which is a combination of both fcc and hcp phase corresponding to (112) and (311) reflections[5].
The structure-property relationship of both Ni-Co and Ni-Co-CNT alloy coatings for HER and OER were used to explain the role of CNT in enhancing electrocatalytic activity, with the support of XRD, SEM and EDX analyses.
The phase structure of binary and composite alloy coatings revealed that diffraction peak of (200) of plane at 43.30 corresponding to fcc structure of NiO(JCPDS 00-047-1049).The peaks at 44.70, 51.80,76.40 corresponding to (111),(200) and (220) crystal planes of fcc Ni structure.
Accordingly, the peak intensity of fcc structure increased.
The coatings found to exhibit peritectic phase structure at higher angles, which is a combination of both fcc and hcp phase corresponding to (112) and (311) reflections[5].
Online since: March 2008
Authors: Akiyoshi Osaka, Satoshi Hayakawa, Kanji Tsuru
The more
HCl was employed, the more Ca(II) could be incorporated in the structure.
Those suggest that the starting solution composition would induce much different structure.
These porous hybrids had a plateau stage characteristic of a typical cellular solid structure.
Bayle, In Better Ceramics Through Chemistry VII: Organic/Inorganic Hybrid Materials, Material Research Society Symposium Proceedings, Vol. 435, B.
Kiefer, In Better Ceramics Through Chemistry VII: Organic/Inorganic Hybrid Materials, Material Research Society Symposium Proceedings, Vol. 435, B.
Those suggest that the starting solution composition would induce much different structure.
These porous hybrids had a plateau stage characteristic of a typical cellular solid structure.
Bayle, In Better Ceramics Through Chemistry VII: Organic/Inorganic Hybrid Materials, Material Research Society Symposium Proceedings, Vol. 435, B.
Kiefer, In Better Ceramics Through Chemistry VII: Organic/Inorganic Hybrid Materials, Material Research Society Symposium Proceedings, Vol. 435, B.
Online since: April 2013
Authors: M. Nasiruzzaman Shaikh
On the other hand, water soluble and colloidally stable nanoparticles play a vital role to investigate their interesting surface functionalization chemistry.
Lauffer, Gadolinium(III) Chelates as MRI Contrast Agents: Structure, Dynamics, and Applications Chem.
Merbach, The Chemistry of Contrast Agents in Medical Magnetic Resonance Imaging, Wiley: Chichester, 2001
Howard, Structures of the yttrium complexes of 1,4,7,10-tetraazacyclododecane-N,N′,N″,N'''-tetraacetic acid (H4dota) and N,N″-bis(benzylcarbamoylmethyl)diethylenetriamine-N,N′,N″-triacetic acid and the solution structure of a zirconium complex of H4dota J.
Lauffer, Gadolinium(III) Chelates as MRI Contrast Agents: Structure, Dynamics, and Applications Chem.
Merbach, The Chemistry of Contrast Agents in Medical Magnetic Resonance Imaging, Wiley: Chichester, 2001
Howard, Structures of the yttrium complexes of 1,4,7,10-tetraazacyclododecane-N,N′,N″,N'''-tetraacetic acid (H4dota) and N,N″-bis(benzylcarbamoylmethyl)diethylenetriamine-N,N′,N″-triacetic acid and the solution structure of a zirconium complex of H4dota J.
Online since: July 2022
Authors: Taifunisyam Taib, Mohd Rafie Johan, Wan Jefrey Basirun
Enhanced Optical and Ragged Metamaterials Properties of Silver Silica Nanocomposite Thin Film via Sol-Gel and Electrophoresis Deposition Technique
Taifunisyam Taib1,a , Mohd Rafie Johan2,3,b* and Wan Jefrey Basirun4,c
1Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
2Nanomaterials Engineering Research Group, Advanced Material Research Laboratory, University of Malaya, Kuala Lumpur, Malaysia
3Nanotechnology and Catalysis Research Center (NANOCAT), University of Malaya, Kuala Lumpur, Malaysia
3Department of Chemistry, University of Malaya, Kuala Lumpur, Malaysia
ataiful@siswa.um.edu.my, *bmrafiej@um.edu.my , cjeff@um.edu.my
*Corresponding author
Keywords: Silver silica; Permittivity; Sol-gel; Refractive index; Electrophoresis deposition, Spectroscopy ellipsometry, metamaterials.
The broad diffraction pattern at angle of 2θ = 23°, similar for all samples are attributed to the amorphous structure of silica in the nanocomposite.
The size and height of the maximum peak (111) at 38° was also reported in another work [18] which shows an apparent growth and nucleation of the AgNP nanocrystal cubic structure into twinned particles.
Basu, Suspension chemistry and electrophoretic deposition of zir-conia electrolyte on conducting and non-conducting substrates, Mater.
Sanders, The structure and orientation of cystals in deposits of metals on mica, Surf.
The broad diffraction pattern at angle of 2θ = 23°, similar for all samples are attributed to the amorphous structure of silica in the nanocomposite.
The size and height of the maximum peak (111) at 38° was also reported in another work [18] which shows an apparent growth and nucleation of the AgNP nanocrystal cubic structure into twinned particles.
Basu, Suspension chemistry and electrophoretic deposition of zir-conia electrolyte on conducting and non-conducting substrates, Mater.
Sanders, The structure and orientation of cystals in deposits of metals on mica, Surf.
Online since: August 2022
Authors: Harsh Dave, Kaustubh Samvatsar
Several materials are used that are exposed to various chemistries of compounds [9, 2].
The Fe-Ni-Cr alloy UNS N08120, generally in annealed or cold-worked form, is commonly used in condensers, heat-exchanger tubes and seamless pipes, but cast material for heavier structures have also been found suitable [10, 11].
If defects exist within the components, corrosion process is seen accelerating up to a certain extent because the entrapped residual gases may form different chemistries in a localized manner by chemical reactions.
UNS N08120 exhibits an austenite structure much similar to that of austenitic structure observed in stainless steel.
The Fe-Ni-Cr alloy UNS N08120, generally in annealed or cold-worked form, is commonly used in condensers, heat-exchanger tubes and seamless pipes, but cast material for heavier structures have also been found suitable [10, 11].
If defects exist within the components, corrosion process is seen accelerating up to a certain extent because the entrapped residual gases may form different chemistries in a localized manner by chemical reactions.
UNS N08120 exhibits an austenite structure much similar to that of austenitic structure observed in stainless steel.
Online since: January 2017
Authors: Emmanuel Iwuoha, Samantha Douman, Unathi Sidwaba, Usisipho Feleni, Rachel Fanelwa Ajayi, Priscilla Baker, Abongile Jijana
Tin Selenide Quantum Dots Electrochemical Biotransducer for the Determination of Indinavir - A Protease Inhibitor Anti-Retroviral Drug
Usisipho Felenia, Rachel Ajayib, Abongile Jijanac, Unathi Sidwabad,
Samantha Doumane, Priscilla Bakerf, Emmanuel Iwuohag*
SensorLab Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville, South Africa.
Figure 1: Molecular structure of indinavir drug (IDV).
Ekpunobi, Structure and optical properties of chemically deposited tin selenide, Chalcogenide Lett 7 (2010) 531-538
Hanrath, SnSe nanocrystals: synthesis, structure, optical properties, and surface chemistry, J Am Chem Soc 132 (2010) 9519-9521
Figure 1: Molecular structure of indinavir drug (IDV).
Ekpunobi, Structure and optical properties of chemically deposited tin selenide, Chalcogenide Lett 7 (2010) 531-538
Hanrath, SnSe nanocrystals: synthesis, structure, optical properties, and surface chemistry, J Am Chem Soc 132 (2010) 9519-9521
Online since: September 2018
Authors: Atif Islam, Sadia Atta, Mehreen Fatima, Misbah Sultan, Nafisa Gull
Grafting of Silica Particles with Linoleic Acid via Modified Stober’s Method for Preconcenrtration of Pesticides in Drinking Water
SADIA Atta1,a, MEHREEN Fatima1,b, ATIF Islam2,c,*,
NAFISA Gull2,d and MISBAH Sultan1,e
1Institute of Chemistry, University of the Punjab, Lahore, 54590, Pakistan
2Department of Polymer Engineering and Technology,
University of the Punjab, Lahore, 54590, Pakistan
asad-ziam@yahoo.com, bmehreenfatima8914@gmail.com, cdratifislam@gmail.com, dnafisagull@gmail.com, emisbahsultan@ymail.com
Keywords: Silica, Linoleic acid, Pesticides, HPLC, Solid Phase Extraction
Abstract.
Linoleic acid has got attention as organic modifier due to its properties of hydrophobicity, polar group, easy preparation and conjugated structure [1-3].
The intense peak at θ = 24o showed that silica peak is amorphous in nature because of smaller particle size and incomplete inner structure of particles.
Acknowledgements The author is highly obliged to the Institute of Chemistry, University of the Punjab, Lahore and PCSIR for providing lab facilities.
Vansant, Structure and microstructure of nanoscale mesoporous silica spheres, Solid State Sci., 6 (2004) 489-498
Linoleic acid has got attention as organic modifier due to its properties of hydrophobicity, polar group, easy preparation and conjugated structure [1-3].
The intense peak at θ = 24o showed that silica peak is amorphous in nature because of smaller particle size and incomplete inner structure of particles.
Acknowledgements The author is highly obliged to the Institute of Chemistry, University of the Punjab, Lahore and PCSIR for providing lab facilities.
Vansant, Structure and microstructure of nanoscale mesoporous silica spheres, Solid State Sci., 6 (2004) 489-498
Online since: June 2012
Authors: J.A. Rodrigues, Holmer Savastano, S.F. Santos, G.H.D. Tonoli, A.E.F.S. Almeida
Introduction
The properties, behavior and performance of cement-based building materials are mainly dependent on the structure of the cementitious matrix that binds together all the phases in the hydrated Portland cement pastes, such as calcium–silicate–hydrates (C-S-H) gel, where C = CaO, S = SiO2 and H = H2O, and calcium hydroxide (CH).
Trettin Hydration behaviour, structure and morphology of hydration phases in advanced cement-based systems containing micro and nanoscale pozzolanic additives, Cement and Concrete Research, 38 (2008) 955–962
Iler, Chemistry of silica: solubility, polymerization, colloid and surfaces properties and biochemistry, John Wiley & Sons, New York, 1979
Planas, M Elices, Size effect and boundary conditions in the Brazilian test: Experimental verification, Materials and Structures/Materiaux et Constructions, 32 (1999) 210-217
Taylor, Cement chemistry, Thomas Telford Publishing, London, 1997.
Trettin Hydration behaviour, structure and morphology of hydration phases in advanced cement-based systems containing micro and nanoscale pozzolanic additives, Cement and Concrete Research, 38 (2008) 955–962
Iler, Chemistry of silica: solubility, polymerization, colloid and surfaces properties and biochemistry, John Wiley & Sons, New York, 1979
Planas, M Elices, Size effect and boundary conditions in the Brazilian test: Experimental verification, Materials and Structures/Materiaux et Constructions, 32 (1999) 210-217
Taylor, Cement chemistry, Thomas Telford Publishing, London, 1997.