Jiangsu Key Laboratory of Environmental Functional Materials

Suzhou Jiangsu, China

Jiangsu Key Laboratory of Environmental Functional Materials

Suzhou Jiangsu, China

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Chen Y.,Suzhou University of Science and Technology | Chen Y.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhang Q.,Suzhou University of Science and Technology | Zhang Q.,Jiangsu Key Laboratory of Environmental Functional Materials | And 6 more authors.
Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry | Year: 2016

A novel phosphorescent host material functionalized with bicarbazole and phosphine oxides, 6, 6'-Bis(diphenyl-phosphinoyl)-9, 9'-dihexyl-3, 3'-bicarbazole (DPDBC), was designed and synthesized. The structure was characterized by means of 1HNMR, 13CNMR, IR and HRMS. The photophysical properties and energy level structure of DPDBC were studied by ultraviolet-visble (UV-Vis) absorption, fluorescence, phosphorescent spectroscopies at 77 K, cyclic voltammetry (CV), thermogravimetric analysis(TGA), differential scanning calorimetry (DSC) and density functional theory(DFT). The results show that it has two absorption lands in dilute CH2Cl2 solution. The maximum absorption wavelength locates at 306 nm. DPDBC can emit blue photofluorescence at 420 nm in dilute CH2Cl2 solution, and exhibit phosphorescent emission at 447 nm from the highest energy vibronic subband at 77 K, from which the triplet state energy (ET) is estimated to be 2.77 eV. DPDBC can be used as host material for the blue emitter FIrpic in PhOLED. Cyclic voltammetry measurement shows that the HOMO energy level of DPDBC locates at -5.48 eV, which matches the energy levels of ITO; the LUMO energy level of DPDBC locates at -2.36 eV, which is close to the energy level of PBD (-2.82 eV). So as a host material for blue phosphorescent organic light-emitting diodes, DPDBC possesses bipolar properties of hole and electron transport, and has good thermal stability. © 2016, Science Press. All right reserved.


Xie J.,Suzhou University of Science and Technology | Xie J.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhao X.,Suzhou University of Science and Technology | Zhao X.,Jiangsu Key Laboratory of Environmental Functional Materials | And 3 more authors.
Shiyou Huagong/Petrochemical Technology | Year: 2012

A novel high temperature-resistant cationic starch filtrate reducer(HTS) used in drilling fluid was prepared from hexamethyldisilazane, phenyl amine, carboxylmethyl starch(CMS) and sodium 3-chloro-2-hydroxypropyl sulfonate. The chemical structure and thermal stability of HTS were studied by means of FTIR and DTA. The results show that phenyl cationic groups, organic silicon functional groups and sulfonic acid groups are introduced into the structure of CMS and the decomposition temperature of HTS is 232°C. The fresh water drilling fluid properties, hightemperature resistance and salt tolerance of HTS were also investigated. The results indicate that the filtration reduction property of the fresh water drilling fluid containing HTS before and after aging 16 h at 160°C is excellent, and the drilling fluid shows a small variation in rheological properties. HTS could resist 40°C higher temperature than those of traditional modified starch filtrate reducers. HTS exhibited a better filtrate reduction property in brine water drilling fluid with 4%(w) and 8%(w) NaCl, which indicated that the salt tolerance of HTS was improved due to the introduction of the sulfonic acid groups.


Yang H.,Suzhou University of Science and Technology | Yang H.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhao X.,Suzhou University of Science and Technology | Zhao X.,Jiangsu Key Laboratory of Environmental Functional Materials | And 3 more authors.
Shiyou Huagong/Petrochemical Technology | Year: 2013

Two novel bis-Schiff-base organic luminescent materials, 1, 4-bis(4-methoxyphenylmethylene) phenylenedi amine (M1) and 1, 4-bis (4-(N, N-diphenyl) aminophenylmethylene) phenylenediamine(M2), were synthesized from p-phenylenediamine and aromatic aldehydes. The structures of the two target compounds were characterized by means of FTIR, 1H NMR and elemental analysis. Their UV-Vis spectra, fluorescence spectra, electrochemical behavior and thermal stability were studied. The results show that M1 emits purple fluorescence in solution but its solid thin film emits blue fluorescence; both M2 in solution and its solid thin film emit green fluorescence. Their ionization potential energies are 5.10, 4.91 eV respectively, which matches with the work function(4.8 eV) of the positive electrode, so the barrier of the hole transporting can be reduced effectively. The results of the TG curves show that their thermal decomposition temperatures are 375 and 350°C respectively, and they have good thermal stability.


Zhang Q.,Suzhou University of Science and Technology | Zhang Q.,Jiangsu Key Laboratory of Environmental Functional Materials | Wei H.,Suzhou University of Science and Technology | Wei H.,Jiangsu Key Laboratory of Environmental Functional Materials | And 8 more authors.
Heterocyclic Communications | Year: 2016

5-(N-Ethylcarbazol-3-yl)thiophene-2-carbaldehyde (ECTC), was synthesized by Suzuki coupling reaction and characterized by 1H NMR, 13C NMR and elemental analysis. This compound strongly quenches fluorescence of Fe3+ ion, whereas almost no quenching is observed in the presence of other metal ions including Na+, K+, Mg2+, Ca2+, Cu2+, Mn2+ and Co2+. Under optimized conditions, the fluorescence intensity of ECTC is quenched in a linear fashion by Fe3+ ion in a wide range of 0.1 μm-10 μm with the limit of detection below 0.1 μm. © 2016 Walter de Gruyter GmbH, Berlin/Boston 2016.


Shao J.,Suzhou University of Science and Technology | Shao J.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhao X.,Suzhou University of Science and Technology | Zhao X.,Jiangsu Key Laboratory of Environmental Functional Materials | And 5 more authors.
Asian Journal of Chemistry | Year: 2014

Novel phenothiazine derivatives were designed and synthesized for application as electroluminescent materials. They were characterized by means of 1H, 13C NMR and FTIR. The optical, electrochemical and thermal properties were also investigated. The relationship between the chemical structure and the properties of these materials was evaluated. Due to the introduction of thiophene ring, these compounds exhibited efficient emission from blue to green and red shifs in absorption and photoluminescence spectra. With respect to thermal properties and the oxidation potentials, it can be turned by varying the conjugation length of compounds and the length of alkyl chains. Mostly, all four compounds had suited HOMO and LUMO energy levels which can be used not only hole-transporting but also electrontansporting materials in organic light-emitting devices.


Lin H.-L.,Suzhou University of Science and Technology | Lin H.-L.,Jiangsu Key Laboratory of Environmental Functional Materials | Chen Y.,Suzhou University of Science and Technology | Chen Y.,Jiangsu Key Laboratory of Environmental Functional Materials | And 6 more authors.
Materials Science Forum | Year: 2016

A novel bipolar green phosphorescence host material, 3,5-bis(4-(9H- phenolthiazine- 9-yl)phenyl)-1,2,4-oxadiazole (PPOXD), was designed and synthesized, and its structure was characterized by means of1H NMR and13C NMR. The photophysical properties of PPOXD were studied by ultraviolet-visble(UV-Vis) absorption, fluorescence, phosphorescent spectroscopies at 77 K and cyclic voltammetry (CV) and density functional theory(DFT). The results show that the maximum absorption wavelength is located in about 210, 247, 270 and 307 nm, and the photofluorescence emission peaks in 378 and 448 nm in CH2Cl2solution. Its phosphorescence emission peaks were observed at 504 and 535 nm, and suitable triplet energy(2.46 eV) for PPOXD was achieved, which could meet the basic requirement of green host material for the green emitter Ir(ppy)3(2.40 eV). Cyclic voltammetry exhibits that HOMO and LUMO level of PPOXD is located in -5.25 and -2.32eV respectively. TGA and DSC results reveal that PPOXD has good thermal stability, the decomposition temperature and glass transition temperature are 275 and 170 ℃, respectively. Therefore, PPOXD is a potential green phosphorescence host material with bipolar feature. © 2016 Trans Tech Publications, Switzerland.


Liu Y.-J.,Suzhou University of Science and Technology | Liu Y.-J.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhao X.,Suzhou University of Science and Technology | Zhao X.,Jiangsu Key Laboratory of Environmental Functional Materials | And 6 more authors.
Materials Science Forum | Year: 2016

Novel phenanthroimidazole derivatives were designed and synthesized for in electroluminescent devices. They were characterized by means of 1H, 13C NMR, FTIR. The optical, electrochemical and thermal properties were also investigated. The relationship between the chemical structure and the properties of these materials was evaluated. Due to the conversion of the substituents onto the 2-imidazole position to the phenanthroimidazole ring, these compounds exhibite efficient emission from blue to yellow-green, red shifs in absorption and photoluminescence spectra. With respect to thermal properties and the oxidation potentials, it can be turned by varying the conjugation length of compounds and the length of alkyl chains. Mostly, all four compounds have suited HOMO and LUMO values, which can be used not only hole-transporting but also electon-tansporting materials in OLEDs. © 2016 Trans Tech Publications, Switzerland.


Zhang Y.,Suzhou University of Science and Technology | Han Y.,Suzhou University of Science and Technology | Wei J.,Suzhou University of Science and Technology | Wang D.,Suzhou University of Science and Technology | Wang D.,Jiangsu Key Laboratory of Environmental Functional Materials
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2014

In this study, alkali-modified water treatment sludge was prepared by impregnated in NaOH. The obtained adsorbent was further applied to remove NH4 + excessive from water. The adsorption efficiency was influenced by simulated wastewater pH, the dosage, initial NH4 + concentration, the temperature and time of adsorption, which were investigated in detail. It was indicated that in weak acid and neutral condition the final concentration of NH4 + in simulated wastewater could reach the secondary standard of ammonia emissions standard after 120 min adsorption at room temperature at the dosage of 20 g·L-1 for the initial NH4 + concentration of 50 mg·L-1. The experimental data were fitted to adsorption isothermal models and kinetic models, respectively. It was found that Langmuir isotherm model and pseudo-second order kinetic model were the best fit. The adsorption mechanism of NH4 + was proven to be electrostatic attraction and ion-exchange.


Zhao X.,Jiangsu Key Laboratory of Environmental Functional Materials | Zhao X.,Suzhou University of Science and Technology | Xia Z.,Jiangsu Key Laboratory of Environmental Functional Materials | Xia Z.,Suzhou University of Science and Technology | And 4 more authors.
Shiyou Huagong/Petrochemical Technology | Year: 2011

A novel organic di-Schiff base derivative containing thiadiazole ring, which could be used as photoelectric material, was synthesized. Firstly, the intermediate 5-(p-aminophenyl)-2-amino-1, 3, 4-thiadiazole was synthesized through two ways. Although the first way using 4-nitrobenzoic acid as the main raw material had one more step than the second way using 4-aminobenzoic acid as the main raw material, its intermediate yield was 18% higher. The intermediate reacted with 4-methoxybenzaldehyde, and then the target compound 2-(4-p-methoxy-phenyl-methyleneamino)-5-(4-p-methoxy-phenyl-methylene aminophenyl)-1, 3, 4-thiadiazole was obtained. The target compound was characterized by means of 1H NMR, FTIR and elemental analysis. Its UV-Vis spectrum, photo-luminescent spectrum, cyclic voltammetry curves and TG-DSC curves were studied. The UV-Vis result showed that the maximum absorption wavelength was 374 nm. The photo-luminescent result showed that it could emit blue fluorescence and the maximum emissive wavelength was around 442 nm. The cyclic voltammetry curves indicated that the electron affinity was 2.76 eV and ionization potential was 5.58 eV. The TG-DSC curves revealed its good thermal stability.


Chen Y.,Suzhou University of Science and Technology | Chen Y.,Jiangsu Key Laboratory of Environmental Functional Materials | Lin H.,Suzhou University of Science and Technology | Lin H.,Jiangsu Key Laboratory of Environmental Functional Materials | And 6 more authors.
Yingxiang Kexue yu Guanghuaxue/Imaging Science and Photochemistry | Year: 2015

A novel phosphorescent host materials, 9-(4-(4, 6-di-α-naphthoxy-1, 3, 5-triazin-2-yl) phenyl) carbazole (NOTPC), was designed and synthesized, and its structure was characterized by means of IR, 1HNMR, 13CNMR and elemental analysis. The photophysical properties and energy-level structure of NOTPC were studied by ultraviolet-visble (UV-Vis) absoption, fluorescence, phosphorescent spectroscopies at 77 K, cyclic voltammetry (CV), thermogravimetric analysis(TGA), differential scanning calorimetry (DSC) and calculated by density functional theory(DFT). The results show that the maximum absorption wavelengths are located at about 290 nm, 340 nm in dilute CH2Cl2 solution. NOTPC can emit blue fluorescence at 390 nm, 472 nm in dilute CH2Cl2 solution, and exhibits blue phosphorescent emission at 452 nm and its triplet state energy (ET) is estimated to be 2.80 eV. NOTPC can be used as host material for the blue emitter bis(4, 6-difluorophenylpyridine)(picolinate)(III) (Firpic) in PhOLED. DFT theoretical calculation reveals that the highest occupied molecular orbital (HOMO) of NOTPC is mainly distributed on N-phenly carbazole moiety, while the lowest unoccupied molecular orbital(LUMO) is mainly dispersed over the triazine moiety. Cyclic voltammetry measurement shows that HOMO energy level of NOTPC is located in -5.40 eV, which matches with the energy levels of ITO(-4.5 - -5.0 eV); LUMO energy level of NOTPC is located in -2.32 eV, which is close to the energy level of PBD (-2.82 eV). So NOTPC possesses bipolar properties of hole and electron transport, and has good thermal stability. © 2015, Science Press. All right reserved.

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