scholarly journals Titanium Compounds Containing Naturally Occurring Dye Molecules

2021 ◽  
Author(s):  
Wei-hui Fang ◽  
Rosa Muller ◽  
Rajesh Bharat Jethwa ◽  
Victor Riesgo-González ◽  
Ning Li ◽  
...  
Keyword(s):  
Solid State ◽  
Dye Molecules ◽  
Naturally Occurring ◽  
Titanium Compounds

A range of titanium compounds containing the naturally occurring dyes quinizarin (QH2) and alizarin (AH2) was synthesized and structurally characterized in the solid state. Among these is the first examples...

scholarly journals Impact of nanosizing a host matrix based on a metal–organic framework on solid-state fluorescence emission and energy transfer

2022 ◽  
Author(s):  
Hikaru Sakamoto ◽  
Akitaka Ito ◽  
Masataka Ohtani
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Metal Organic Framework ◽  
Fluorescence Emission ◽  
Dye Molecules ◽  
Host Matrix ◽  
Metal Organic ◽  
Solid State Fluorescence ◽  
Organic Framework

We demonstrate that the nanosize effect appears to affect the properties of dye molecules encapsulated in the pores of a metal–organic framework (dye@MOF). The emissive properties of the nanosized dye@MOF...

History of Luminescence from Ancient to Modern Times

2015 ◽  
Vol 361 ◽  
pp. 1-13 ◽  
Author(s):  
Hardev Singh Virk
Keyword(s):  
Solid State ◽  
Chinese Text ◽  
Song Dynasty ◽  
Sixth Century ◽  
Luminescent Material ◽  
Modern Times ◽  
Aurora Borealis ◽  
The Song Dynasty ◽  
Naturally Occurring ◽  
History Of

Luminescent phenomena have fascinated mankind since the earliest times. The light from the aurora borealis, glow worms, luminescent wood, rotting fish and meat are all examples of naturally occurring luminescence. E. Newton Harvey’s 770 page volume “A History of Luminescence: From the Earliest Times until 1900” is a classic which narrates interesting stories from ancient cultures to modern times. The earliest written account of a solid state luminescent material comes from a Chinese text published in the Song dynasty (960–1279 A.D.). The Buddhist sacred jewel, called "hashi-no-tama" in Japan, is alleged to be self-luminous and to shed a brilliant light on its surroundings. In the Svetasvatara Upanishad, probably recorded at some time before the sixth century BC, we find a mention of fire-flies as one of the manifestations of Brahma.

Sheet and Tube Organosilicon Polymers

1998 ◽  
Vol 519 ◽  
Author(s):  
D. E. Katsoulist ◽  
T. C.-S. Chaot ◽  
E. A. McQuistont ◽  
Chenggang Chen ◽  
Malcolm E. Kenney ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Solid State ◽  
Interlayer Spacing ◽  
Heterogeneous Reactions ◽  
Naturally Occurring ◽  
Pendent Groups ◽  
Sheet Silicates ◽  
Siloxane Polymers ◽  
Organosilicon Polymers

AbstractReaction of chlorosilanes with sheet silicates, such as the naturally occurring apophyllite, [Ca4Si8O2O(F, OH).8H2O] results in the formation of sheet organofunctional siloxane polymers. Similarly, reaction of chlorosilanes with the tube silicate K2CuSi4O10results in the formation of tube organofunctional siloxane polymers. Representative polymers have been characterized by XRD, KR, XPS and solid state 29Si NMR. The interlayer spacing of the sheet polymers varies with the type of the group pendent on the sheet. When the organofunctional pendent groups of the sheet polymers contain reactive sites, further reactivity can be demonstrated with heterogeneous reactions such as hydrosilation. The sheet polymers behave as very effective thickeners of siloxane fluids. Dispersions of them in siloxane fluids exhibit thixotropic properties. The organosilicon polymers have the potential to show useful chemical, thermal, rheological and mechanical properties

scholarly journals Synthesis and Characterization of Rutile Pigments with Cr and Nb

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Jan Večeřa ◽  
Iveta Šedová ◽  
Petr Mikulášek ◽  
Petra Šulcová
Keyword(s):  
Particle Size ◽  
Solid State ◽  
Particle Size Distribution ◽  
Solid State Reaction ◽  
Organic Matrix ◽  
Synthesis And Characterization ◽  
Visual Color ◽  
Rutile Pigments ◽  
Titanium Compounds

Rutile pigments Ti1-3xCrxNb2xO2±δ (where x=0, 0.05, 0.10, 0.20, 0.30 and 0.50) prepared by solid-state reaction are investigated. Chromium is chromophore (coloring ion) and niobium is counterion (charge-compensating element for electroneutrality). The effect of composition (x), calcination temperature (850, 900, 950, 1000, 1050, 1100 and 1150°C), and starting titanium compounds (anatase TiO2, hydrated anatase paste, TiOSO4·2H2O, and hydrated Na2Ti4O9 paste) on their color properties into organic matrix and particle size distribution was observed. According to the highest chroma C and visual color evaluation, yellow and orange pigments were selected as in color the most interesting. They have concentration x=0.05 or 0.10 and are prepared from anatase TiO2 and TiOSO4·2H2O at temperature ≥1050°C.

Impedance spectroscopy study of solid-state dye-sensitized solar cells with varying Spiro-OMeTAD concentration

2009 ◽  
Vol 1211 ◽  
Author(s):  
Márcio S Góes ◽  
Francisco Fabregat-Santiago ◽  
Paulo R Bueno ◽  
Juan Bisquert
Keyword(s):  
Solar Cells ◽  
Solid State ◽  
Dye Sensitized Solar Cells ◽  
Hole Transport ◽  
Dye Molecules ◽  
Dye Sensitized ◽  
Diode Ideality Factor ◽  
Impedance Spectroscopy Study ◽  
Sensitized Solar Cells ◽  
Current Potential

AbstractThis work reports on the changes of solid-state cells dye-sensitized solar cells performance with the variation of concentration of spiro-OMeTAD between 5% and 25% in the fabrication of the cell. The changes in charge recombination and capacitance correlate with the improvement of current-potential characteristics a increasing spiro-OMeTAD content, which is explained by reduction of transport resistance for hole transport, the increase of charge separation in the dye molecules, and importantly, with the increase of the β-factor in the recombination resistance, that causes a reduction of the diode ideality factor.

Carbohydrate-based PBT copolyesters from a cyclic diol derived from naturally occurring tartaric acid: a comparative study regarding melt polycondensation and solid-state modification

2014 ◽  
Vol 16 (4) ◽  
pp. 1789-1798 ◽  
Author(s):  
Cristina Lavilla ◽  
Erik Gubbels ◽  
Abdelilah Alla ◽  
Antxon Martínez de Ilarduya ◽  
Bart A. J. Noordover ◽  
...  
Keyword(s):  
Solid State ◽  
Comparative Study ◽  
Tartaric Acid ◽  
Melt Polycondensation ◽  
Naturally Occurring

Utilization of Expanded Perlite as a Source of Silica for Synthesizing Wollastonite by Solid State Reaction

2016 ◽  
Vol 690 ◽  
pp. 143-149 ◽  
Author(s):  
Napat Chantaramee ◽  
Pornpimol Kaewpoomee ◽  
Ratchadaporn Puntharod
Keyword(s):  
Solid State ◽  
Calcination Temperature ◽  
Solid State Reaction ◽  
Volcanic Glass ◽  
Starting Material ◽  
Molar Ratio ◽  
Expanded Perlite ◽  
Mixing Ratios ◽  
Naturally Occurring

Naturally occurring volcanic glass in the form of the expanded perlite consist of 72.59wt% silica was used as a starting material together with the calcined eggshell in order to explore the wollastonite formation via solid state reaction. The molar mixing ratios of CaO:SiO2 were carried out from 1:0.8 to 1:1.4, calcined in the range of 600 - 1100°C for 2 - 5 hours. The XRD results confirm the formation of wollastonite (CaSiO3) started at 800°C, and increasing of calcination temperature favoured the formation of gelehnite (Ca2Al2SiO7) associated with wollastonite. The morphology characterized by SEM clearly show tiny needle-like shape of primary wollastonite on the surface of agglomerate particles. The CaO:SiO2 ratio of 1:1.4 which calcined at 1100 °C for 2-5 hours was found to be the most appropriate molar ratio in the case of using the calcined eggshell and expanded perlite as starting materials.

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