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Online since: October 2014
Authors: Yue Ming Sun, Wei Jiang, Yu Dai, Bin Huang, Xin Xin Ban, Huan Ge Xu, Ya Ping Yang, Yuan Yuan Liu, Ya An Zhang
Thermally Activated Delayed Fluorescence Materials based on Carbazole/sulfone
Bin Huang1,2, Wei Jiang1,a*, Yuanyuan Liu 2, Yaan Zhang 2, Yaping Yang 2,
Yu Dai2, Xinxin Ban1, Huange Xu1, Yueming Sun1,b*
1 School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, P.
Structures and synthesis of carbazole/sulfone derivatives. 2.
Scheme 1 shows the synthetic routes and structures of the carbazole/sulfone derivatives.
Ulmann coupling reaction of 3-bromo-diphenylsulfone and 4-bromo-diphenylsulfone with 3,6-di-tert-butylcarbazole provided 3-TC-DPS and 4-TC-DPS. [9] Finally, the products were purified by the silica column method and recrystallization from n-hexane/CH2Cl2, yielding the very pure white powders. 1H-NMR, 13C-NMR, matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry, and elemental analysis were employed to confirm the chemical structures of carbazole/sulfone derivatives in the experimental section. 3.2 The UV-vis absorption spectra of carbazole/sulfone derivatives.
Structures and synthesis of carbazole/sulfone derivatives. 2.
Scheme 1 shows the synthetic routes and structures of the carbazole/sulfone derivatives.
Ulmann coupling reaction of 3-bromo-diphenylsulfone and 4-bromo-diphenylsulfone with 3,6-di-tert-butylcarbazole provided 3-TC-DPS and 4-TC-DPS. [9] Finally, the products were purified by the silica column method and recrystallization from n-hexane/CH2Cl2, yielding the very pure white powders. 1H-NMR, 13C-NMR, matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry, and elemental analysis were employed to confirm the chemical structures of carbazole/sulfone derivatives in the experimental section. 3.2 The UV-vis absorption spectra of carbazole/sulfone derivatives.
Online since: August 2013
Authors: Chang Da Zheng, Wen Qing Fang, Feng Yi Jiang, Chun Lan Mo
Tran et al. first produced the blue luminous diode with the epitaxial structure of InGaN/GaN MQW on Si (111) [12].
Many research groups had reported that the epitaxial high-quality GaN blue LED structure could be achieved on a Si substrate and a blue LED device when a vertical chip structure is produced [9,15].
Interference microscope (Olympus BX51) and AFM (Chinese Academy of Sciences Chemistry Division CSPM3100) were used to analyze the macro- and micro-surface appearance.
Many research groups had reported that the epitaxial high-quality GaN blue LED structure could be achieved on a Si substrate and a blue LED device when a vertical chip structure is produced [9,15].
Interference microscope (Olympus BX51) and AFM (Chinese Academy of Sciences Chemistry Division CSPM3100) were used to analyze the macro- and micro-surface appearance.
Online since: September 2013
Authors: Zhao Jie Cui, Shi Yong Du, Guo Lan Fan, Jie Luo
However, PAH concentrations and distribution patterns are also significantly impacted by the local industrial structures and emission sources [8].
The energy structure also contributed a lot to the PAH production, and it is reported approximately 70% energy comes from coal in northern China [7].
Besides the reason of energy structure discussed above [15], the typical meteorological conditions in winter were favorable for the gather of atmospheric PAHs in particles [12].
Pitts Jr, in: Chemistry of the Upper and Lower Atmosphere: Theory, Experiments and Applications, 969 pp, Academic Press. (2000)
The energy structure also contributed a lot to the PAH production, and it is reported approximately 70% energy comes from coal in northern China [7].
Besides the reason of energy structure discussed above [15], the typical meteorological conditions in winter were favorable for the gather of atmospheric PAHs in particles [12].
Pitts Jr, in: Chemistry of the Upper and Lower Atmosphere: Theory, Experiments and Applications, 969 pp, Academic Press. (2000)
Online since: March 2014
Authors: Muhammad Fahad, Maqsood Ahmed Khan, Marianne Gilbert
The chemical structure of Pluronics is shown in Fig. 1.
Chemical structure of pluronics [1] Pluronics are being used in various commercial applications such as lubrication, emulsification, detergency, foaming, controlled drug release and gelling and are therefore, considered as an important class of surfactants [2,3].
[3] Liang X., Guo C., Ma J., Wang J., Chen S., Liu H., "Temperature-Dependent Aggregation and Disaggregation of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymer in Aqueous Solution", The Journal of Physical Chemistry B, 2007, Volume 111, Number 46, 13217-13220
[17] Alexandridis P., Yang L., "SANS Investigation of Polyether Block Copolymer Micelle Structure in Mixed Solvents of Water and Formamide, Ethanol, or Glycerol", Macromolecules, 2000, Volume 33, Number 15, 5574-5587
Chemical structure of pluronics [1] Pluronics are being used in various commercial applications such as lubrication, emulsification, detergency, foaming, controlled drug release and gelling and are therefore, considered as an important class of surfactants [2,3].
[3] Liang X., Guo C., Ma J., Wang J., Chen S., Liu H., "Temperature-Dependent Aggregation and Disaggregation of Poly(ethylene oxide)-Poly(propylene oxide)-Poly(ethylene oxide) Block Copolymer in Aqueous Solution", The Journal of Physical Chemistry B, 2007, Volume 111, Number 46, 13217-13220
[17] Alexandridis P., Yang L., "SANS Investigation of Polyether Block Copolymer Micelle Structure in Mixed Solvents of Water and Formamide, Ethanol, or Glycerol", Macromolecules, 2000, Volume 33, Number 15, 5574-5587
Online since: January 2013
Authors: Hua Sheng Wang, Xiao Lu Liu, Chun Hua Yin, Le Lv, Qian Qian Xu, Hai Yan
School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2.
MC-RR has the different structure from MC-LR because of the Arg L-amino acids, and MC-YR has the different structure because of the Tyr L-amino acids.
The enzyme encoded by USTB-05-A is responsible for cleaving the target peptide bond between Adda and arginine in the cyclic structure of MC-RR and of MC-YR.
MC-RR has the different structure from MC-LR because of the Arg L-amino acids, and MC-YR has the different structure because of the Tyr L-amino acids.
The enzyme encoded by USTB-05-A is responsible for cleaving the target peptide bond between Adda and arginine in the cyclic structure of MC-RR and of MC-YR.
Online since: December 2024
Authors: Ainun Zulfikar, Nia Sasria, Nababan John Stanley
Starch is composed of starch and amylopectin whose structure is shown in Figure 5.
Structure of starch (Muharam, 2022) Figure 5 shows the presence of hydroxyl groups in the starch polymer chains which can interact with H2O molecules, causing low water resistance.
This happens because elastic material structures tend to increase in length more easily [23].
Lubis, Pengaruh carboxymethyl cellulose terhadap sifat bioplastik berbasis tandan kosong kelapa sawit dan plasticizer gliseroL, Alchemy: Journal of Chemistry. 11 (2023) 25-31
Structure of starch (Muharam, 2022) Figure 5 shows the presence of hydroxyl groups in the starch polymer chains which can interact with H2O molecules, causing low water resistance.
This happens because elastic material structures tend to increase in length more easily [23].
Lubis, Pengaruh carboxymethyl cellulose terhadap sifat bioplastik berbasis tandan kosong kelapa sawit dan plasticizer gliseroL, Alchemy: Journal of Chemistry. 11 (2023) 25-31
Online since: April 2019
Authors: Karna Wijaya, Wega Trisunaryanti, Amalia Kurnia Amin
Effect of Promoters and Calcination Temperature on Surface and Acidity of Modified Zirconia
Amalia Kurnia Amina, Wega Trisunaryantib and Karna Wijayac*
Departement of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Yogyakarta, Indonesia
aamalia.kurnia.a@mail.ugm.ac.id, bwegats@ugm.ac.id, ckarnawijaya@ugm.ac.id
Keywords: Sulfated zirconia, Ni sulfated zirconia, Calcination, Acidity
Abstract.
The aim of the research is to study the effect of sulfuric acid, calcination temperature, and Ni metal on the physicochemical properties of modified zirconia including the crystalline structure, crystallinity, surface properties, acidity, and morphology.
Effect of calcination temperature and sulfating agent concentration toward structure and sulfur content.
Sauer, The surface structure of sulfated zirconia : periodic ab initio study of sulfuric acid adsorbed on ZrO2 (101) and ZrO2 (001), J.
The aim of the research is to study the effect of sulfuric acid, calcination temperature, and Ni metal on the physicochemical properties of modified zirconia including the crystalline structure, crystallinity, surface properties, acidity, and morphology.
Effect of calcination temperature and sulfating agent concentration toward structure and sulfur content.
Sauer, The surface structure of sulfated zirconia : periodic ab initio study of sulfuric acid adsorbed on ZrO2 (101) and ZrO2 (001), J.
Online since: July 2019
Authors: Tri Wicaksono Sigit, Yohannes Marudut Tua Silaen, Hosta Ardyananta, Salma Halimah, Amaliya Rasyida, Haniffudin Nurdiansah
Introduction
Tissue engineering (TE) is a multidisciplinary field focused on the solution of medical problems which involves the fundamental understanding of structure and function relationships in normal and pathological tissues and the development of biological substitutes that restore, maintain or improve tissue function.
The use of alginate as a biomaterial is because alginate can be easily modified physically and chemically to obtain properties, functions, applications and structures such as modified into hydrogels, microspheres, microcapsules, foam and fibers where alginate modification can increase application in various fields of desired biomaterials [2, 3].
Several parameters affect the swellingability such as structure of polymer network, and the interaction between polymer chains [13].
Chemistry, Biotechnology and Materials Science 2017, Pages 603-648 http://dx.doi.org/10.1016/B978-0-12-812360-7.00017-3 [13] Nasim Golafshana, R.Rezahasani et al.Nanohybrid hydrogels of laponite: PVA-Alginate as a potential wound healing material..
The use of alginate as a biomaterial is because alginate can be easily modified physically and chemically to obtain properties, functions, applications and structures such as modified into hydrogels, microspheres, microcapsules, foam and fibers where alginate modification can increase application in various fields of desired biomaterials [2, 3].
Several parameters affect the swellingability such as structure of polymer network, and the interaction between polymer chains [13].
Chemistry, Biotechnology and Materials Science 2017, Pages 603-648 http://dx.doi.org/10.1016/B978-0-12-812360-7.00017-3 [13] Nasim Golafshana, R.Rezahasani et al.Nanohybrid hydrogels of laponite: PVA-Alginate as a potential wound healing material..
Online since: March 2013
Authors: Mohamad Rusop, Muhamad Nur Amalina
The comparison made for the CuI deposition was done to investigate its interfacial contact between the CuI and porous structure of TiO2.
The mist-atomization is employed prior to usual CuI deposition in order to make better contact and better filling of CuI to the porous TiO2 structure.
Even though the S1 sample has the lowest CuI crystal size, we could clearly observe the porous structures with crystal grains and crystal boundaries.
Tennakone, Dye-Sensitized Solid-State Solar Cells: Use of Crystal Growth Inhibitors for Deposition of the Hole Collector, Chemistry of Materials 14 (2002) 954-955
The mist-atomization is employed prior to usual CuI deposition in order to make better contact and better filling of CuI to the porous TiO2 structure.
Even though the S1 sample has the lowest CuI crystal size, we could clearly observe the porous structures with crystal grains and crystal boundaries.
Tennakone, Dye-Sensitized Solid-State Solar Cells: Use of Crystal Growth Inhibitors for Deposition of the Hole Collector, Chemistry of Materials 14 (2002) 954-955
Online since: October 2014
Authors: A. van Riessen, Giulia Masi, William D.A. Rickard, Maria Chiara Bignozzi
The polymerised materials contain tetrahedral coordinated Al and Si, with charge balance of the Al tetrahedra being achieved by the presence of Na+ or K+ ions, organizing themselves in a continuous three dimensional structure [2].
Park, Control of pore size in ceramic foams: Influence of surfactant concentration, Materials Chemistry and Physics 113 (2009) 441-444
Rickard, A. van Riessen, Performance of solid and cellular structured fly ash geopolymers exposed to a simulated fire, Cement and Concrete Composites (2013)
[17] AS 1530.4, Methods for Fire Tests on Building Materials, Components and Structures-Fire-Resistance Test of Elements of Constructions, Australian Standard (2005).
Park, Control of pore size in ceramic foams: Influence of surfactant concentration, Materials Chemistry and Physics 113 (2009) 441-444
Rickard, A. van Riessen, Performance of solid and cellular structured fly ash geopolymers exposed to a simulated fire, Cement and Concrete Composites (2013)
[17] AS 1530.4, Methods for Fire Tests on Building Materials, Components and Structures-Fire-Resistance Test of Elements of Constructions, Australian Standard (2005).