The impact of solid-solution composition on kinetics and mechanism of [2+2] photodimerizations of cinnamic acid derivatives

CrystEngComm ◽  
2021 ◽  
Author(s):  
Lorenzo Pandolfi ◽  
ANDREA GIUNCHI ◽  
Tommaso Salzillo ◽  
Aldo Brillante ◽  
Raffaele Guido Guido Della Valle ◽  
...  
Keyword(s):  
Solid Solution ◽  
General Formula ◽  
Solid Solutions ◽  
Cinnamic Acid ◽  
Kinetics And Mechanism ◽  
Solution Composition ◽  
Cinnamic Acid Derivatives ◽  
Solid Solution Composition ◽  
The Impact

We propose the use of solid-solutions for the modulation of the kinetic in [2+2] photocycloaddition. Solid-solutions with general formula [1H]BrxCl1-x (1 = 4-amino-cinnamic acid; 0 < x < 1) were...

Mineral analysis of river sand around Mt. Tsukuba for provenance estimation of Atamadai type pottery (2500–1500 BC) from Hinoki site (Tochigi, Japan)

2019 ◽  
Vol 34 (2) ◽  
pp. 159-163
Author(s):  
S. Ichikawa ◽  
Y. Sakito ◽  
T. Kurisaki
Keyword(s):  
Solid Solution ◽  
Solid Solutions ◽  
Manufacturing Process ◽  
Mineral Analysis ◽  
Solution Composition ◽  
River Sand ◽  
Solid Solution Composition ◽  
X Ray ◽  
Geological Characteristics ◽  
Mineral Analyses

A total of 77 pottery shards originating from the Middle Jomon period (2500–1500 BC) were excavated from the Hinoki site in Tochigi, Japan. Fifty-five of those were Atamadai type pottery, which might contain some temper fragments from the manufacturing process. The pottery shards were analyzed by X-ray diffractometry (XRD). The mineral analyses were compared with the river sands around Mt. Tsukuba to demonstrate the temper's origin of the Atamadai type pottery. Their XRD profiles revealed the following solid solutions which could be fingerprint minerals: biotite for the temper and plagioclase, and hornblende for the clay and temper. These minerals might indicate the origin of each sample because their d-spacings depended on the solid solution composition reflecting their geological characteristics.

scholarly journals Теплоемкость твердых растворов системы Er-=SUB=-2-=/SUB=-Ge-=SUB=-2-=/SUB=-O_7- Er-=SUB=-2-=/SUB=-Sn-=SUB=-2-=/SUB=-O-=SUB=-7-=/SUB=- в области 350-1000 K

2019 ◽  
Vol 61 (4) ◽  
pp. 660
Author(s):  
Л.Т. Денисова ◽  
Л.А. Иртюго ◽  
В.В. Белецкий ◽  
Н.В. Белоусова ◽  
В.М. Денисов
Keyword(s):  
Solid Solution ◽  
Differential Scanning Calorimetry ◽  
Solid State ◽  
Specific Heat ◽  
Solid Solutions ◽  
Thermodynamic Functions ◽  
Solution Composition ◽  
Scanning Calorimetry ◽  
Solid Solution Composition ◽  
Effects Of Temperature

AbstractEr_2Ge_2O_7–Er_2Sn_2O_7 solid solutions have been obtained using solid-state synthesis by burning the stoichiometric mixtures of the initial oxides in air in the temperature range of 1273–1473 K. The effects of temperature and solid solution composition on the specific heat have been examined by differential scanning calorimetry. The Er_2Ge_2O_7 thermodynamic functions have been calculated.

scholarly journals Влияние состава зародышевого слоя AlGaAs на формирование антифазных доменов в структурах (Al)GaAs, выращенных газофазной эпитаксией на подложках Ge/Si(100)

2021 ◽  
Vol 47 (8) ◽  
pp. 37
Author(s):  
А.В. Рыков ◽  
Р.Н. Крюков ◽  
И.В. Самарцев ◽  
П.А. Юнин ◽  
В.Г. Шенгуров ◽  
...  
Keyword(s):  
Solid Solution ◽  
Optical Properties ◽  
Seed Layer ◽  
Aluminum Content ◽  
Sample Surface ◽  
Gaas Layer ◽  
Solution Composition ◽  
Solid Solution Composition ◽  
Si Substrates ◽  
Antiphase Domains

GaAs-based heterostructures grown by metalorganic vapor-phase epitaxy on virtual Ge/Si substrates using an AlxGa1-xAs seed layer with different aluminum content x in the solid solution are investigated. The effect of solid solution composition on the density and size of antiphase domains emerging on the sample surface and on the optical properties of the GaAs layer is shown. Si(100) substrates with a small unintentional miscut of 0.7° to [110] were used for growth.

A Pseudo-Binary Diagram of the (Bi,Pb)-Sr-Ca-Cu-O System

2013 ◽  
Vol 750 ◽  
pp. 184-187
Author(s):  
X.Y. Lu ◽  
D. Yi ◽  
H. Chen
Keyword(s):  
Phase Diagram ◽  
Solid Solution ◽  
Binary Phase Diagram ◽  
Eutectic Reaction ◽  
Peritectoid Reaction ◽  
Solution Composition ◽  
Solid Solution Composition ◽  
Binary Diagram ◽  
Composition Point ◽  
Two Phases

A pseudo-binary phase diagram of the (Bi,Pb)-Sr-Ca-Cu-O system along the Bi1.6Pb0.4Sr2Can-1CunOx line is constructed. This resulting phase diagram shows three kinds of peritectic reactions, one eutectic reaction and one peritectoid reaction. The equilibrium solid phases in this diagram are the 2201 (n=1), 2212 (n=2), 2223 (n=3) and (Sr,Ca)CuO2 (n→∝) phases. The 2201 phase is solid solution which is stable at 1≤n≤1.2. The eutectic composition point is close to the maximum solid solution composition of the 2201 phase. The temperature interval between the peritectic reaction of L + (Sr,Ca)2CuO3 + (Sr,Ca)CuO2 → 2212 and the eutectic reaction of L → 2201 + 2212 is only about 3°C. For the composition of n=3, CaO and the liquid phase are stable at temperatures above 940°C. During the cooling, these two phases react peritectically to (Sr,Ca)2CuO3. At around 890°C, (Sr,Ca)2CuO3 reacts with the liquid to produce (Sr,Ca)CuO2. At around 865°C, (Sr,Ca)2CuO3 and (Sr,Ca)CuO2 react with the liquid to produce the 2212. The 2223 phase is transformed by a peritectoid reaction of the 2212 phase and residual (Sr,Ca)2CuO3, (Sr,Ca)CuO2.

Solid-solution composition and powder high-speed steel properties

1989 ◽  
Vol 28 (4) ◽  
pp. 290-291 ◽  
Author(s):  
A. N. Popandopulo ◽  
Ko Men Chor ◽  
N. B. Tsvetova ◽  
A. A. Smirnov
Keyword(s):  
Solid Solution ◽  
High Speed ◽  
High Speed Steel ◽  
Solution Composition ◽  
Solid Solution Composition ◽  
Steel Properties

The crystal structures, solid solutions and infrared spectra of copiapite-group minerals

2007 ◽  
Vol 71 (5) ◽  
pp. 553-569 ◽  
Author(s):  
J. Majzlan ◽  
R. Michallik
Keyword(s):  
Solid Solution ◽  
General Formula ◽  
Solid Solutions ◽  
Infrared Spectra ◽  
Structural Type ◽  
The Other ◽  
Solid Solution Series ◽  
Complex Behaviour ◽  
Acidic Environments ◽  
Large Groups

AbstractCopiapite is a mineral of iron- and sulphate-rich acidic environments and has a general formula AFe3+4 (SO4)6(OH)2(H2O)20, where A = Fe2+, 2/3Fe3+, 2/3Al3+, Mg, Zn. The structure is built by infinite tetrahedral-octahedral chains and isolated octahedrally coordinated A sites. Our synthetic and natural copiapite samples can be divided into two large groups based on the orientation of the structural fragments. One group comprises copiapite phases where A = Al3+, Fe2+ or Fe3+ and we designate it as the structural type AL. The other group consists of copiapite with A = Mg2+, Zn2+ or Ni2+ and this is the structural type MG. The solid-solution series between Fe3+ and Al3+ copiapite is continuous. The series between Mg2+-Al3+, Mg2+-Fe3+ and Mg2+-Al3+-Fe3+ copiapite are not continuous; the samples with intermediate compositions contain two copiapite phases, one of the type AL and one of the type MG. The series between Mg2+ and Zn2+ copiapite is continuous only at 25°C. At 75°C, the Zn-rich portion of this systemcrystallizes a copiapite-like phase whose structure may be a superstructure of copiapite. The series between Al-Fe2+ and Mg-Fe2+ copiapite are not continuous and show complex behaviour of the intermediate compositions.

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